diff --git a/docs/404.html b/docs/404.html index 8f4d423..bd0b7f1 100644 --- a/docs/404.html +++ b/docs/404.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Crystal Image master-dev + Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master diff --git a/docs/CrImage.html b/docs/CrImage.html index 914cc23..035af15 100644 --- a/docs/CrImage.html +++ b/docs/CrImage.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage - Crystal Image master-dev + CrImage - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -428,77 +428,77 @@

- + cr-image.cr
- + cr-image/edge_policy.cr
- + cr-image/map.cr
- + cr-image/operation/bilinear_resize.cr
- + cr-image/region.cr
- + cr-image/window_view.cr
- + lib-formats/bindings/lib_jpeg_turbo.cr
- + lib-formats/bindings/lib_spng.cr
- + lib-formats/bindings/lib_webp.cr
- + pluto.cr
- + stumpy.cr diff --git a/docs/CrImage/BlackView.html b/docs/CrImage/BlackView.html index 0062906..e2de356 100644 --- a/docs/CrImage/BlackView.html +++ b/docs/CrImage/BlackView.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::BlackView(T) - Crystal Image master-dev + CrImage::BlackView(T) - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -430,7 +430,7 @@

- + cr-image/window_view.cr @@ -606,7 +606,7 @@


- [View source] + [View source]
@@ -636,7 +636,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/ChannelType.html b/docs/CrImage/ChannelType.html index 5800f57..952ebac 100644 --- a/docs/CrImage/ChannelType.html +++ b/docs/CrImage/ChannelType.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::ChannelType - Crystal Image master-dev + CrImage::ChannelType - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -429,7 +429,7 @@

- + cr-image/channel_type.cr @@ -598,7 +598,7 @@


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diff --git a/docs/CrImage/Color.html b/docs/CrImage/Color.html index 7028c62..02c5262 100644 --- a/docs/CrImage/Color.html +++ b/docs/CrImage/Color.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Color - Crystal Image master-dev + CrImage::Color - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -432,7 +432,7 @@

- + cr-image/color.cr @@ -588,7 +588,7 @@


- [View source] + [View source]
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diff --git a/docs/CrImage/ComplexMap.html b/docs/CrImage/ComplexMap.html index 6e579dc..4f0295d 100644 --- a/docs/CrImage/ComplexMap.html +++ b/docs/CrImage/ComplexMap.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::ComplexMap - Crystal Image master-dev + CrImage::ComplexMap - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -433,7 +433,7 @@

- + cr-image/map.cr @@ -823,7 +823,7 @@


- [View source] + [View source]
@@ -848,7 +848,7 @@


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@@ -864,7 +864,7 @@


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@@ -880,7 +880,7 @@


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diff --git a/docs/CrImage/EdgePolicy.html b/docs/CrImage/EdgePolicy.html index e8c2499..183fa6b 100644 --- a/docs/CrImage/EdgePolicy.html +++ b/docs/CrImage/EdgePolicy.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::EdgePolicy - Crystal Image master-dev + CrImage::EdgePolicy - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -428,7 +428,7 @@

- + cr-image/edge_policy.cr @@ -572,7 +572,7 @@


- [View source] + [View source]
@@ -588,7 +588,7 @@


- [View source] + [View source]
@@ -604,7 +604,7 @@


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diff --git a/docs/CrImage/ErrorView.html b/docs/CrImage/ErrorView.html index 16c9ca6..9cf305c 100644 --- a/docs/CrImage/ErrorView.html +++ b/docs/CrImage/ErrorView.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::ErrorView(T) - Crystal Image master-dev + CrImage::ErrorView(T) - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -430,7 +430,7 @@

- + cr-image/window_view.cr @@ -606,7 +606,7 @@


- [View source] + [View source]
@@ -636,7 +636,7 @@


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diff --git a/docs/CrImage/Exception.html b/docs/CrImage/Exception.html index 8c8b5b3..ef919c6 100644 --- a/docs/CrImage/Exception.html +++ b/docs/CrImage/Exception.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Exception - Crystal Image master-dev + CrImage::Exception - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -430,7 +430,7 @@

- + cr-image/exception.cr @@ -548,7 +548,7 @@


- [View source] + [View source]
@@ -564,7 +564,7 @@


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@@ -580,7 +580,7 @@


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diff --git a/docs/CrImage/FftUtil.html b/docs/CrImage/FftUtil.html index 25a2028..e61760f 100644 --- a/docs/CrImage/FftUtil.html +++ b/docs/CrImage/FftUtil.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::FftUtil - Crystal Image master-dev + CrImage::FftUtil - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -431,7 +431,7 @@

- + cr-image/fft_util.cr @@ -583,7 +583,7 @@


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@@ -605,7 +605,7 @@


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diff --git a/docs/CrImage/FloatMap.html b/docs/CrImage/FloatMap.html index ace1425..8f0b2e9 100644 --- a/docs/CrImage/FloatMap.html +++ b/docs/CrImage/FloatMap.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::FloatMap - Crystal Image master-dev + CrImage::FloatMap - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -444,7 +444,7 @@

- + cr-image/map.cr @@ -827,7 +827,7 @@


- [View source] + [View source]
@@ -843,7 +843,7 @@


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@@ -859,7 +859,7 @@


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diff --git a/docs/CrImage/Format.html b/docs/CrImage/Format.html index 386f6e5..57c58de 100644 --- a/docs/CrImage/Format.html +++ b/docs/CrImage/Format.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format - Crystal Image master-dev + CrImage::Format - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -437,7 +437,7 @@

- + cr-image/format/save.cr diff --git a/docs/CrImage/Format/JPEG.html b/docs/CrImage/Format/JPEG.html index 1a627b1..b0a428b 100644 --- a/docs/CrImage/Format/JPEG.html +++ b/docs/CrImage/Format/JPEG.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::JPEG - Crystal Image master-dev + CrImage::Format::JPEG - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

- + lib-formats/jpeg.cr @@ -522,7 +522,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Format/Open.html b/docs/CrImage/Format/Open.html index d1d895a..b4834d0 100644 --- a/docs/CrImage/Format/Open.html +++ b/docs/CrImage/Format/Open.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::Open - Crystal Image master-dev + CrImage::Format::Open - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -437,7 +437,7 @@

- + cr-image/format/open.cr @@ -509,7 +509,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Format/PNG.html b/docs/CrImage/Format/PNG.html index 8d25eb0..b514afe 100644 --- a/docs/CrImage/Format/PNG.html +++ b/docs/CrImage/Format/PNG.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::PNG - Crystal Image master-dev + CrImage::Format::PNG - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

- + lib-formats/png.cr @@ -522,7 +522,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Format/PPM.html b/docs/CrImage/Format/PPM.html index 1323719..5e8ae34 100644 --- a/docs/CrImage/Format/PPM.html +++ b/docs/CrImage/Format/PPM.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::PPM - Crystal Image master-dev + CrImage::Format::PPM - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

- + cr-image/format/ppm.cr @@ -522,7 +522,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Format/Save.html b/docs/CrImage/Format/Save.html index f776da1..a3b92b7 100644 --- a/docs/CrImage/Format/Save.html +++ b/docs/CrImage/Format/Save.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::Save - Crystal Image master-dev + CrImage::Format::Save - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -433,7 +433,7 @@

- + cr-image/format/save.cr @@ -507,7 +507,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/Format/WebP.html b/docs/CrImage/Format/WebP.html index bb86ebc..9f4cca9 100644 --- a/docs/CrImage/Format/WebP.html +++ b/docs/CrImage/Format/WebP.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Format::WebP - Crystal Image master-dev + CrImage::Format::WebP - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

- + lib-formats/webp.cr @@ -522,7 +522,7 @@


- [View source] + [View source]
diff --git a/docs/CrImage/GrayscaleImage.html b/docs/CrImage/GrayscaleImage.html index f07ec53..cd9c86e 100644 --- a/docs/CrImage/GrayscaleImage.html +++ b/docs/CrImage/GrayscaleImage.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::GrayscaleImage - Crystal Image master-dev + CrImage::GrayscaleImage - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -499,42 +499,42 @@

- + cr-image/grayscale_image.cr
- + jpeg.cr
- + pluto.cr
- + png.cr
- + stumpy.cr
- + webp.cr @@ -1667,7 +1667,7 @@


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diff --git a/docs/CrImage/GrayscaleImage/Pixel.html b/docs/CrImage/GrayscaleImage/Pixel.html index b0fb83f..7b46974 100644 --- a/docs/CrImage/GrayscaleImage/Pixel.html +++ b/docs/CrImage/GrayscaleImage/Pixel.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::GrayscaleImage::Pixel - Crystal Image master-dev + CrImage::GrayscaleImage::Pixel - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -419,7 +419,7 @@

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diff --git a/docs/CrImage/Image.html b/docs/CrImage/Image.html index d8d24b2..00e7d8c 100644 --- a/docs/CrImage/Image.html +++ b/docs/CrImage/Image.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Image - Crystal Image master-dev + CrImage::Image - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -447,7 +447,7 @@

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diff --git a/docs/CrImage/IntMap.html b/docs/CrImage/IntMap.html index 2e17baa..f861dcd 100644 --- a/docs/CrImage/IntMap.html +++ b/docs/CrImage/IntMap.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::IntMap - Crystal Image master-dev + CrImage::IntMap - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -444,7 +444,7 @@

- + cr-image/map.cr @@ -827,7 +827,7 @@


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diff --git a/docs/CrImage/Map.html b/docs/CrImage/Map.html index 3455cf0..4f0af78 100644 --- a/docs/CrImage/Map.html +++ b/docs/CrImage/Map.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Map(T) - Crystal Image master-dev + CrImage::Map(T) - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -446,7 +446,7 @@

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diff --git a/docs/CrImage/MapImpl.html b/docs/CrImage/MapImpl.html index 5bda1e1..65f6dd6 100644 --- a/docs/CrImage/MapImpl.html +++ b/docs/CrImage/MapImpl.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::MapImpl(T) - Crystal Image master-dev + CrImage::MapImpl(T) - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -463,7 +463,7 @@

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diff --git a/docs/CrImage/Operation.html b/docs/CrImage/Operation.html index e9a6beb..69acf7e 100644 --- a/docs/CrImage/Operation.html +++ b/docs/CrImage/Operation.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation - Crystal Image master-dev + CrImage::Operation - Crystal Image master @@ -45,7 +45,7 @@

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@@ -551,7 +551,7 @@


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diff --git a/docs/CrImage/Operation/ChannelSwap.html b/docs/CrImage/Operation/ChannelSwap.html index d200a92..4414ea1 100644 --- a/docs/CrImage/Operation/ChannelSwap.html +++ b/docs/CrImage/Operation/ChannelSwap.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::ChannelSwap - Crystal Image master-dev + CrImage::Operation::ChannelSwap - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -448,7 +448,7 @@

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diff --git a/docs/CrImage/Operation/Contrast.html b/docs/CrImage/Operation/Contrast.html index 7ca539e..09738a7 100644 --- a/docs/CrImage/Operation/Contrast.html +++ b/docs/CrImage/Operation/Contrast.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::Contrast - Crystal Image master-dev + CrImage::Operation::Contrast - Crystal Image master @@ -45,7 +45,7 @@

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- master-dev + master @@ -453,7 +453,7 @@

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diff --git a/docs/CrImage/Operation/GaussianBlur.html b/docs/CrImage/Operation/GaussianBlur.html index eefa760..7c060e7 100644 --- a/docs/CrImage/Operation/GaussianBlur.html +++ b/docs/CrImage/Operation/GaussianBlur.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::GaussianBlur - Crystal Image master-dev + CrImage::Operation::GaussianBlur - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

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- [View source] + [View source]
@@ -536,7 +536,7 @@


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- master-dev + master @@ -454,7 +454,7 @@

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diff --git a/docs/CrImage/Operation/HistogramEqualize/Histogram.html b/docs/CrImage/Operation/HistogramEqualize/Histogram.html index 0c4d2e4..7852673 100644 --- a/docs/CrImage/Operation/HistogramEqualize/Histogram.html +++ b/docs/CrImage/Operation/HistogramEqualize/Histogram.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::HistogramEqualize::Histogram - Crystal Image master-dev + CrImage::Operation::HistogramEqualize::Histogram - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -430,7 +430,7 @@

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diff --git a/docs/CrImage/Operation/HorizontalBlur.html b/docs/CrImage/Operation/HorizontalBlur.html index 1a06ac0..72bbc15 100644 --- a/docs/CrImage/Operation/HorizontalBlur.html +++ b/docs/CrImage/Operation/HorizontalBlur.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::HorizontalBlur - Crystal Image master-dev + CrImage::Operation::HorizontalBlur - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -450,7 +450,7 @@

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- [View source] + [View source]
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diff --git a/docs/CrImage/Operation/MaskApply.html b/docs/CrImage/Operation/MaskApply.html index 4a432a7..26249a9 100644 --- a/docs/CrImage/Operation/MaskApply.html +++ b/docs/CrImage/Operation/MaskApply.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::MaskApply - Crystal Image master-dev + CrImage::Operation::MaskApply - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -462,7 +462,7 @@

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diff --git a/docs/CrImage/Operation/Pad.html b/docs/CrImage/Operation/Pad.html index ff9ef32..4ed1537 100644 --- a/docs/CrImage/Operation/Pad.html +++ b/docs/CrImage/Operation/Pad.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Operation::Pad - Crystal Image master-dev + CrImage::Operation::Pad - Crystal Image master @@ -45,7 +45,7 @@

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- master-dev + master @@ -450,7 +450,7 @@

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- master-dev + master @@ -450,7 +450,7 @@

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- [View source] + [View source]
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- master-dev + master @@ -494,42 +494,42 @@

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diff --git a/docs/CrImage/Region.html b/docs/CrImage/Region.html index 4c3bd21..efad522 100644 --- a/docs/CrImage/Region.html +++ b/docs/CrImage/Region.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - CrImage::Region - Crystal Image master-dev + CrImage::Region - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -431,7 +431,7 @@

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- master-dev + master @@ -430,7 +430,7 @@

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@@ -838,7 +838,7 @@


- [View source] + [View source]
diff --git a/docs/Pluto.html b/docs/Pluto.html index b272f74..b305c3e 100644 --- a/docs/Pluto.html +++ b/docs/Pluto.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Pluto - Crystal Image master-dev + Pluto - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -440,21 +440,21 @@

- + lib/pluto/src/pluto.cr
- + lib/pluto/src/pluto/channel_type.cr
- + pluto.cr diff --git a/docs/Pluto/ImageGA.html b/docs/Pluto/ImageGA.html index 960c801..2a265dd 100644 --- a/docs/Pluto/ImageGA.html +++ b/docs/Pluto/ImageGA.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Pluto::ImageGA - Crystal Image master-dev + Pluto::ImageGA - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -453,14 +453,14 @@

- + lib/pluto/src/pluto/image_ga.cr
- + pluto.cr @@ -665,7 +665,7 @@


- [View source] + [View source]
diff --git a/docs/Pluto/ImageRGBA.html b/docs/Pluto/ImageRGBA.html index d29c25a..e20033b 100644 --- a/docs/Pluto/ImageRGBA.html +++ b/docs/Pluto/ImageRGBA.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Pluto::ImageRGBA - Crystal Image master-dev + Pluto::ImageRGBA - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -453,14 +453,14 @@

- + lib/pluto/src/pluto/image_rgba.cr
- + pluto.cr @@ -672,7 +672,7 @@


- [View source] + [View source]
diff --git a/docs/StumpyCore.html b/docs/StumpyCore.html index 5e95399..b2f69a4 100644 --- a/docs/StumpyCore.html +++ b/docs/StumpyCore.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - StumpyCore - Crystal Image master-dev + StumpyCore - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -428,77 +428,77 @@

- + lib/stumpy_core/src/stumpy_core/canvas.cr
- + lib/stumpy_core/src/stumpy_core/rgba.cr
- + lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr
- + lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr
- + lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr
- + lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr
- + lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr
- + lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr
- + lib/stumpy_core/src/stumpy_core/rgba/mixing.cr
- + lib/stumpy_core/src/stumpy_core/utils.cr
- + stumpy.cr diff --git a/docs/StumpyCore/Canvas.html b/docs/StumpyCore/Canvas.html index 4e2313a..b3c8c85 100644 --- a/docs/StumpyCore/Canvas.html +++ b/docs/StumpyCore/Canvas.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - StumpyCore::Canvas - Crystal Image master-dev + StumpyCore::Canvas - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -443,14 +443,14 @@

- + lib/stumpy_core/src/stumpy_core/canvas.cr
- + stumpy.cr @@ -535,7 +535,7 @@


- [View source] + [View source]
diff --git a/docs/Tutorial.html b/docs/Tutorial.html index afa4db9..f882f31 100644 --- a/docs/Tutorial.html +++ b/docs/Tutorial.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Tutorial - Crystal Image master-dev + Tutorial - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -434,14 +434,14 @@

- + tutorials/chromakey_tutorial.cr
- + tutorials/tutorial.cr diff --git a/docs/Tutorial/ChromaKey.html b/docs/Tutorial/ChromaKey.html index 10b14c4..0e314d6 100644 --- a/docs/Tutorial/ChromaKey.html +++ b/docs/Tutorial/ChromaKey.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Tutorial::ChromaKey - Crystal Image master-dev + Tutorial::ChromaKey - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -453,7 +453,7 @@

- + tutorials/chromakey_tutorial.cr diff --git a/docs/Tutorial/EdgeDetection.html b/docs/Tutorial/EdgeDetection.html index 6b61fd6..4ad051a 100644 --- a/docs/Tutorial/EdgeDetection.html +++ b/docs/Tutorial/EdgeDetection.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Tutorial::EdgeDetection - Crystal Image master-dev + Tutorial::EdgeDetection - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -455,7 +455,7 @@

- + tutorials/edge_detection_tutorial.cr diff --git a/docs/Tutorial/FindDifferences.html b/docs/Tutorial/FindDifferences.html index f3e6ed8..3362557 100644 --- a/docs/Tutorial/FindDifferences.html +++ b/docs/Tutorial/FindDifferences.html @@ -5,7 +5,7 @@ - + @@ -14,7 +14,7 @@ - Tutorial::FindDifferences - Crystal Image master-dev + Tutorial::FindDifferences - Crystal Image master @@ -45,7 +45,7 @@

- master-dev + master @@ -406,8 +406,8 @@

Given differences.jpg image:

Two almost identical images with subtle differences

We can programatically detect most of the differences between these two images:

-
require "../../src/cr-image"
-require "../../src/all_formats"
+
require "cr-image"
+require "cr-image/jpeg"
 
 image = CrImage::RGBAImage.open("differences.jpg")
 ret = image.clone
@@ -472,7 +472,7 @@ 

   

   
     
-      
+      
         tutorials/find_differences.cr
       
     
diff --git a/docs/index.html b/docs/index.html
index a187191..69e707f 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -5,7 +5,7 @@
 
 
 
-
+
 
 
 
@@ -14,7 +14,7 @@
 
 
   
-  Crystal Image master-dev
+  Crystal Image master
   
@@ -45,7 +45,7 @@ 

       

 
       
-        master-dev
+        master
       
     
   
diff --git a/docs/index.json b/docs/index.json
index 6688581..58a3e6e 100644
--- a/docs/index.json
+++ b/docs/index.json
@@ -1 +1 @@
-{"repository_name":"Crystal Image","body":"
Crystal Image (Processing)
\n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here originated as a fork from [Pluto](https://github.com/phenopolis/pluto) and further takes inspiration from [Stumpy](https://github.com/stumpycr/stumpy_core),\nand support converting to and from both of those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n   ```yaml\n   dependencies:\n     cr-image:\n       github: vici37/cr-image\n   ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n  .to_gray\n  .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n  moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See the tutorials](http://troy.sornson.io/cr-image/Tutorial.html) for more examples.\n\n### [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core) Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n**NOTE:** Currently Pluto and CrImage share the same bindings for `libturbojpeg`, `libspng`, and `libwebp`. If you\nuse Pluto, you _cannot_ use those formats from CrImage.\n\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n**NOTE:** Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image.cr#L20"},{"filename":"src/cr-image/edge_policy.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/edge_policy.cr#L1"},{"filename":"src/cr-image/map.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L1"},{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/region.cr#L1"},{"filename":"src/cr-image/window_view.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/pluto.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/pluto.cr#L35"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This module by itself isn't very interesting. Try taking a look through the [tutorials](./Tutorial.html) for better examples.","summary":"
This module by itself isn't very interesting.
","types":[{"html_id":"Crystal Image/CrImage/BlackView","path":"CrImage/BlackView.html","kind":"class","full_name":"CrImage::BlackView(T)","name":"BlackView","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},"ancestors":[{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/window_view.cr","line_number":76,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L76"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An implementation of `Window`, where the value of a point in the window that is off the edge of the underlying `Map` resolves to zero (or black)","summary":"
An implementation of Window, where the value of a point in the window that is off the edge of the underlying Map resolves to zero (or black)
","constructors":[{"html_id":"new(width,height,map,map_x,map_y)-class-method","name":"new","abstract":false,"args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"args_string":"(width, height, map, map_x, map_y)","args_html":"(width, height, map, map_x, map_y)","location":{"filename":"src/cr-image/window_view.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L17"},"def":{"name":"new","args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"visibility":"Public","body":"_ = BlackView(T).allocate\n_.initialize(width, height, map, map_x, map_y)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"[](x:Int32,y:Int32):T-instance-method","name":"[]","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32) : T","args_html":"(x : Int32, y : Int32) : T","location":{"filename":"src/cr-image/window_view.cr","line_number":77,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L77"},"def":{"name":"[]","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"return_type":"T","visibility":"Public","body":"adjusted_x = (x - @half_width) + @map_x\nadjusted_y = (y - @half_height) + @map_y\nif (adjusted_x < 0 || adjusted_x >= @map.width) || (adjusted_y < 0 || adjusted_y >= @map.height)\n  return T.zero\nend\n@map[(adjusted_y * @map.width) + adjusted_x]\n"}}]},{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_color_channel` and `GrayscaleImage#each_color_channel`","summary":"
Enum representing different image channels supported by CrImage
","instance_methods":[{"html_id":"alpha?-instance-method","name":"alpha?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":9,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L9"},"def":{"name":"alpha?","visibility":"Public","body":"self == Alpha"}},{"html_id":"blue?-instance-method","name":"blue?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L7"},"def":{"name":"blue?","visibility":"Public","body":"self == Blue"}},{"html_id":"default:UInt8-instance-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L11"},"def":{"name":"default","return_type":"UInt8","visibility":"Public","body":"alpha? ? 255_u8 : 0_u8"}},{"html_id":"gray?-instance-method","name":"gray?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L8"},"def":{"name":"gray?","visibility":"Public","body":"self == Gray"}},{"html_id":"green?-instance-method","name":"green?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L6"},"def":{"name":"green?","visibility":"Public","body":"self == Green"}},{"html_id":"red?-instance-method","name":"red?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L5"},"def":{"name":"red?","visibility":"Public","body":"self == Red"}}]},{"html_id":"Crystal Image/CrImage/Color","path":"CrImage/Color.html","kind":"class","full_name":"CrImage::Color","name":"Color","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/color.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Utility class for parsing and representing colors that can be used for certain\nmethods in CrImage.\n\nSee `Operation::MaskApply#apply_color`, `Operation::Draw#draw_square`, or `Operation::Draw#draw_circle`","summary":"
Utility class for parsing and representing colors that can be used for certain methods in CrImage.
","constructors":[{"html_id":"default:Color-class-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L11"},"def":{"name":"default","return_type":"Color","visibility":"Public","body":"new(ChannelType::Red.default, ChannelType::Green.default, ChannelType::Blue.default, ChannelType::Alpha.default)"}},{"html_id":"new(red:UInt8,green:UInt8,blue:UInt8,alpha:UInt8=ChannelType::Alpha.default)-class-method","name":"new","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"args_string":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","args_html":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","location":{"filename":"src/cr-image/color.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L8"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"visibility":"Public","body":"_ = allocate\n_.initialize(red, green, blue, alpha)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"of(color:String):Color-class-method","name":"of","doc":"Parse color from a hex string:\n\n```\nColor.of(\"#1\")        # same as \"#11\" => Color.new(17, 17, 17, 255)\nColor.of(\"#01\")       # => Color.new(1, 1, 1, 255)\nColor.of(\"#123\")      # same as \"#112233\" => Color.new(17, 34, 51, 255)\nColor.of(\"#1234\")     # same as \"#11223344\" => Color.new(34, 51, 68, 17)\nColor.of(\"#010203\")   # => Color.new(1, 2, 3, 255)\nColor.of(\"#01020304\") # => Color.new(2, 3, 4, 1)\n```","summary":"
Parse color from a hex string:
","abstract":false,"args":[{"name":"color","external_name":"color","restriction":"String"}],"args_string":"(color : String) : Color","args_html":"(color : String) : Color","location":{"filename":"src/cr-image/color.cr","line_number":49,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L49"},"def":{"name":"of","args":[{"name":"color","external_name":"color","restriction":"String"}],"return_type":"Color","visibility":"Public","body":"if ((!(color.starts_with?(\"#\"))) || (!({2, 3, 4, 5, 7, 9}.includes?(color.size)))) || (color.match(/^#[^0-9a-f]/i))\n  raise(\"Invalid hex color '#{color}': must start with '#' followed by 1, 2, 3, 4, 6, or 9 alphanumeric characters (0-9 or a-f)\")\nend\ncase color.size\nwhen 2\n  gray = (color[1].to_i(16)).to_u8\n  gray = (gray << 4) + gray\n  self.new(gray, gray, gray)\nwhen 3\n  gray = (color[1, 2].to_i(16)).to_u8\n  self.new(gray, gray, gray)\nwhen 4\n  red = (color[1].to_i(16)).to_u8\n  green = (color[2].to_i(16)).to_u8\n  blue = (color[3].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue)\nwhen 5\n  alpha = (color[1].to_i(16)).to_u8\n  red = (color[2].to_i(16)).to_u8\n  green = (color[3].to_i(16)).to_u8\n  blue = (color[4].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue, (alpha << 4) + alpha)\nwhen 7\n  red = (color[1, 2].to_i(16)).to_u8\n  green = (color[3, 2].to_i(16)).to_u8\n  blue = (color[5, 2].to_i(16)).to_u8\n  self.new(red, green, blue)\nelse\n  alpha = (color[1, 2].to_i(16)).to_u8\n  red = (color[3, 2].to_i(16)).to_u8\n  green = (color[5, 2].to_i(16)).to_u8\n  blue = (color[7, 2].to_i(16)).to_u8\n  self.new(red, green, blue, alpha)\nend\n"}},{"html_id":"random:Color-class-method","name":"random","doc":"Generate a random color with full (255) opacity","summary":"
Generate a random color with full (255) opacity
","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L16"},"def":{"name":"random","return_type":"Color","visibility":"Public","body":"r = Random.new\nnew(r.rand(UInt8), r.rand(UInt8), r.rand(UInt8), ChannelType::Alpha.default)\n"}}],"instance_methods":[{"html_id":"==(other:Color):Bool-instance-method","name":"==","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"}],"args_string":"(other : Color) : Bool","args_html":"(other : Color) : Bool","location":{"filename":"src/cr-image/color.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L93"},"def":{"name":"==","args":[{"name":"other","external_name":"other","restriction":"Color"}],"return_type":"Bool","visibility":"Public","body":"(((red == other.red) && (green == other.green)) && (blue == other.blue)) && (alpha == other.alpha)"}},{"html_id":"[](channel_type:ChannelType):UInt8-instance-method","name":"[]","doc":"Receive the UInt8 portion of this color corresponding to `channel_type`","summary":"
Receive the UInt8 portion of this color corresponding to channel_type
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Convert this Color to a single UInt8 gray value
","abstract":false,"args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"args_string":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","args_html":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L22"},"def":{"name":"gray","args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"return_type":"UInt8","visibility":"Public","body":"Math.min(255_u8, (((red * red_multiplier) + (blue * blue_multiplier)) + (green * green_multiplier)).to_u8)"}},{"html_id":"green:UInt8-instance-method","name":"green","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"green","visibility":"Public","body":"@green"}},{"html_id":"red:UInt8-instance-method","name":"red","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"red","visibility":"Public","body":"@red"}}]},{"html_id":"Crystal Image/CrImage/ComplexMap","path":"CrImage/ComplexMap.html","kind":"class","full_name":"CrImage::ComplexMap","name":"ComplexMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":606,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L606"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"instance_methods":[{"html_id":"ifft:FloatMap-instance-method","name":"ifft","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":609,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L609"},"def":{"name":"ifft","return_type":"FloatMap","visibility":"Public","body":"FloatMap.new(width, (FftUtil.ifft2d(width, raw)).map(&.real))"}},{"html_id":"to_c:ComplexMap-instance-method","name":"to_c","doc":"Convert this `Map` to a `ComplexMap`","summary":"
Convert this Map to a ComplexMap
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A general enum for determining behavior around edges of Image or Maps.
","instance_methods":[{"html_id":"black?-instance-method","name":"black?","abstract":false,"location":{"filename":"src/cr-image/edge_policy.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/edge_policy.cr#L4"},"def":{"name":"black?","visibility":"Public","body":"self == Black"}},{"html_id":"none?-instance-method","name":"none?","abstract":false,"location":{"filename":"src/cr-image/edge_policy.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/edge_policy.cr#L6"},"def":{"name":"none?","visibility":"Public","body":"self == None"}},{"html_id":"repeat?-instance-method","name":"repeat?","abstract":false,"location":{"filename":"src/cr-image/edge_policy.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/edge_policy.cr#L5"},"def":{"name":"repeat?","visibility":"Public","body":"self == Repeat"}}]},{"html_id":"Crystal Image/CrImage/ErrorView","path":"CrImage/ErrorView.html","kind":"class","full_name":"CrImage::ErrorView(T)","name":"ErrorView","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},"ancestors":[{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/window_view.cr","line_number":61,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L61"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An implementation of `Window`, where the value of a point in the window that is off the edge of teh underlying `Map` causes an error","summary":"
An implementation of Window, where the value of a point in the window that is off the edge of teh underlying Map causes an error
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Exception class for any errors thrown by CrImage
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Utility class for Fast Fourier Transforms
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Perform Fast Fourier Transform on inp.
","abstract":false,"args":[{"name":"inp","external_name":"inp","restriction":"Array(Float64)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"args_string":"(inp : Array(Float64), buffer : Array(Complex) | Nil = nil) : Array(Complex)","args_html":"(inp : Array(Float64), buffer : Array(Complex) | Nil = nil) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L59"},"def":{"name":"fft1d","args":[{"name":"inp","external_name":"inp","restriction":"Array(Float64)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"return_type":"Array(Complex)","visibility":"Public","body":"if buf = buffer\nelse\n  buf = Array(Complex).new(inp.size) do\n    Complex.zero\n  end\nend\nFftUtil.fft1d(Array(Complex).new(inp.size) do |i|\n  Complex.new(inp.unsafe_fetch(i))\nend, buf)\n"}},{"html_id":"fft1d(inp:Array(Complex),buffer:Array(Complex)=inp.dup):Array(Complex)-class-method","name":"fft1d","doc":"Perform Fast Fourier Transform on `inp`.\n\nCan optionally pass in `buffer` which must be the same length as `inp`","summary":"
Perform Fast Fourier Transform on inp.
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Calculates Fast Fourier Transform of ret.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, using and rewriting ret for the output, as a 2 dimensional array with width.
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Perform Inverse Fast Fourier Transform on inp.
","abstract":false,"args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","args_html":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":165,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L165"},"def":{"name":"ifft1d","args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"if inp.size == inp.size.next_power_of_two\nelse\n  raise(Exception.new(\"Input is of size #{inp.size}, which is not a power of 2 (next power of 2: #{inp.size.next_power_of_two})\"))\nend\nFftUtil.ifft1d_unsafe(inp.dup, buffer)\n"}},{"html_id":"ifft1d_unsafe(ret:Array(Complex)|Slice(Complex),buffer:Array(Complex)=ret.dup):Array(Complex)|Slice(Complex)-class-method","name":"ifft1d_unsafe","doc":"Perform Inverse Fast Fourier Transform on `ret`. Will use and overwrite the original values in `ret` to do so.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`. This method makes no bound checks or error checks.","summary":"
Perform Inverse Fast Fourier Transform on ret.
","abstract":false,"args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","args_html":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":173,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L173"},"def":{"name":"ifft1d_unsafe","args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex) | Slice(Complex)","visibility":"Public","body":"shape = 1\nhalf = ret.size\nreal_half = (ret.size >> 1)\nwhile half > 1\n  double_half = half\n  half = half >> 1\n  neg_i_pi_div_shape = Math::PI.i / shape\n  buffer.to_unsafe.copy_from(ret.to_unsafe, ret.size)\n  half_offset = half\n  shape.times do |i|\n    term = Math.exp(neg_i_pi_div_shape * i)\n    half.times do |j|\n      offset = j + half_offset\n      buffer.unsafe_put(offset, (buffer.unsafe_fetch(offset)) * term)\n    end\n    half_offset = half_offset + double_half\n  end\n  offset = -1\n  counter = -1\n  real_half.times do |i|\n    offset = offset + 1\n    counter = counter + 1\n    if counter == half\n      counter = 0\n      offset = offset + half\n    end\n    ret.unsafe_put(i, (buffer.unsafe_fetch(offset)) + (buffer.unsafe_fetch(offset + half)))\n    ret.unsafe_put(i + real_half, (buffer.unsafe_fetch(offset)) - (buffer.unsafe_fetch(offset + half)))\n  end\n  shape = shape << 1\nend\nret.map!(&./(ret.size))\n"}},{"html_id":"ifft2d(width:Int32,inp:Array(Complex),buffer:Array(Complex)|Nil=nil):Array(Complex)-class-method","name":"ifft2d","doc":"Perform Inverse Fast Fourier Transform, treating as `inp` as a 2 dimensional array with `width`.\n\nCan optionally pass in `buffer` which must be an array at least the larger of `width` or `inp.size // width`.","summary":"
Perform Inverse Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"args_string":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","args_html":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":124,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L124"},"def":{"name":"ifft2d","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"return_type":"Array(Complex)","visibility":"Public","body":"if width == width.next_power_of_two\nelse\n  raise(Exception.new(\"Width #{width} must be power of 2 (next power of two: #{width.next_power_of_two})\"))\nend\nheight = inp.size // width\nif height == height.next_power_of_two\nelse\n  raise(Exception.new(\"Input height #{height} must be power of 2 (next power of two: #{(height).next_power_of_two})\"))\nend\nif buf = buffer\nelse\n  buf = Array(Complex).new(Math.max(width, inp.size // width)) do\n    Complex.zero\n  end\nend\nFftUtil.ifft2d_unsafe(width, inp.dup, buf)\n"}},{"html_id":"ifft2d_unsafe(width:Int32,ret:Array(Complex),buffer:Array(Complex)):Array(Complex)-class-method","name":"ifft2d_unsafe","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":135,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L135"},"def":{"name":"ifft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.ifft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.ifft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}}]},{"html_id":"Crystal Image/CrImage/FloatMap","path":"CrImage/FloatMap.html","kind":"class","full_name":"CrImage::FloatMap","name":"FloatMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":508,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L508"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Implementation of `MapImpl` for `Float64` types.","summary":"
Implementation of MapImpl for Float64 types.
","instance_methods":[{"html_id":"to_f:FloatMap-instance-method","name":"to_f","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":519,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L519"},"def":{"name":"to_f","return_type":"FloatMap","visibility":"Public","body":"self"}},{"html_id":"to_f64:self-instance-method","name":"to_f64","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":511,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L511"},"def":{"name":"to_f64","return_type":"self","visibility":"Public","body":"self"}},{"html_id":"to_i:IntMap-instance-method","name":"to_i","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":515,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L515"},"def":{"name":"to_i","return_type":"IntMap","visibility":"Public","body":"IntMap.new(width, @raw.map(&.to_i))"}}],"macros":[{"html_id":"method_missing(call)-macro","name":"method_missing","abstract":false,"args":[{"name":"call","external_name":"call","restriction":""}],"args_string":"(call)","args_html":"(call)","location":{"filename":"src/cr-image/map.cr","line_number":509,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L509"},"def":{"name":"method_missing","args":[{"name":"call","external_name":"call","restriction":""}],"visibility":"Public","body":"          def \n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n : self\n            self.class.new(width, @raw.map(&.\n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n))\n          \nend\n        \n"}}]},{"html_id":"Crystal Image/CrImage/Format","path":"CrImage/Format.html","kind":"module","full_name":"CrImage::Format","name":"Format","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"constants":[{"id":"SUPPORTED_FORMATS","name":"SUPPORTED_FORMATS","value":"[{extension: \".ppm\", method: \"ppm\"}, {extension: \".jpeg\", method: \"jpeg\"}, {extension: \".jpg\", method: \"jpeg\"}, {extension: \".png\", method: \"png\"}, {extension: \".webp\", method: \"webp\"}] of Nil"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Provides a convenience method for saving image files to the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage.save(\"image.jpg\")\n```\nSee `Open` for a convenience method to read images from the filesystem","summary":"
Provides a convenience method for saving image files to the filesystem.
","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"
Provides methods to read from and write to jpeg.
","instance_methods":[{"html_id":"to_jpeg(io:IO,quality:Int32=100):Nil-instance-method","name":"to_jpeg","doc":"Output the image as JPEG to `io`","summary":"
Output the image as JPEG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, quality : Int32 = 100) : Nil","args_html":"(io : IO, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/jpeg.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/jpeg.cr#L74"},"def":{"name":"to_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"return_type":"Nil","visibility":"Public","body":"handle = LibJPEGTurbo.init_compress\nimage_data = IO::Memory.new(size * 3)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\nend\nbuffer = Pointer(UInt8).null\ncheck_jpeg(handle, LibJPEGTurbo.compress2(handle, image_data.buffer, @width, 0, @height, LibJPEGTurbo::PixelFormat::RGB, pointerof(buffer), out size, LibJPEGTurbo::Subsampling::S444, quality, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibJPEGTurbo.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/open.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"
Provides a convenience method for opening up image files from the filesystem.
","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"
Reads this image from file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n    case filename\n    {% for format in SUPPORTED_FORMATS %}\n      when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n    {% end %}\n      else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n  __arg0[:extension].id\nend.join(\", \")).id }}\"\n    end\n    {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"
Provides methods to read from and write to PNG.
","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"
Output the image as PNG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"
Provides methods to read from and write to PPM.
","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"
Output this image to io using PPM image encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n  io.write_byte(red.unsafe_fetch(index))\n  io.write_byte(green.unsafe_fetch(index))\n  io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"
Write this image to file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n  {% if true %}\n        case filename\n        {% for format in SUPPORTED_FORMATS %}\n          when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n        {% end %}\n          else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n    __arg0[:extension].id\n  end.join(\", \")).id }}\"\n        end\n        {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"
Provides methods to read from and write to WebP.
","instance_methods":[{"html_id":"to_webp(io:IO,*,lossy:Bool=false,quality:Int32=100):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"
Write image to io using WebP encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","args_html":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/webp.cr#L59"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"splat_index":1,"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nsize, buffer = lossy ? lossy_encode(image_data, quality) : lossless_encode(image_data)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal 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Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"
An image in Grayscale.
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Read image_data as JPEG encoded bytes
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Construct an Image from reading in bytes from io
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Read image_data and PNG encoded bytes
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Construct an Image by reading bytes from io
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Read image_data as PPM encoded bytes
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Read bytes from io as PPM encoded
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Read image_data as WebP encoded bytes
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Read bytes from io as WebP encoded
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Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)
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Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)
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Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)
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Return a Pixel representing this cell in the image.
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Return the Array(UInt8) corresponding to channel_type
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Set the underlying Array(UInt8) of channel_type to the new channel.
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Return #alpha channel
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Return the "#blue" channel (returns #gray)
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Create a new GrayscaleImage as a copy of this one
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Run provided block with the ChannelType::Gray channels and channel types.
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Run provided block with the ChannelType::Gray channels and channel types.
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Return the "#green" channel (returns #gray)
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Height of image
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Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).
","abstract":false,"location":{"filename":"src/cr-image/grayscale_image.cr","line_number":171,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/grayscale_image.cr#L171"},"def":{"name":"invert","visibility":"Public","body":"clone.invert!"}},{"html_id":"invert!-instance-method","name":"invert!","doc":"Invert grayscale pixels (replace each pixel will `255 - p` for all `p` in `@gray`). Modifies self.\n\n\"Woman\n\nBecomes\n\n\"Woman","summary":"
Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).
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Return the "#red" channel (returns #gray)
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Return the number of pixels this image contains
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Construct a simple threshold Mask containing all pixels with a UInt8 value greater than #threshold Given sample image:
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Convert this Map to a GrayscaleImage.
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Mask is a wrapper around BitArray, where each flag represents a boolean bit of information about a pixel from an image.
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Construct a new Mask of width x height, preset to initial
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Construct a new Mask from an integer (useful for testing or small mask construction)
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Construct a new Mask from the dimensions of passed in image with an initial bit
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Construct a new Mask with a set width and bits from #bits
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Construct a new Mask of width x height using &block to determine if a bit should be true or not (passed in x and y coordinates)
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Construct a new Mask from an array of BitArray.
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at x and y
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Return a new BitArray corresponding to the partial row specified
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Return a new BitArray corresponding to the partial column specified
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at index
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Set the bit for coordinate x and y
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Set the bits for partial row xs at column y
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Set the bits for row x and partial columns ys
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Set the bits for partial rows xs and partial columns ys
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Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).
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Convert this Mask to a GrayscaleImage, with false bits becoming 0, and true bits becoming 255
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Blurs the image
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Brightens an image (increases white value)
","instance_methods":[{"html_id":"brightness(value:Float64):self-instance-method","name":"brightness","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/brightness.cr#L12"},"def":{"name":"brightness","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.brightness!(value)"}},{"html_id":"brightness!(value:Float64):self-instance-method","name":"brightness!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/brightness.cr#L16"},"def":{"name":"brightness!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"each_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, (    (channel.unsafe_fetch(index)) * value))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","path":"CrImage/Operation/ChannelSwap.html","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap","abstract":false,"locations":[{"filename":"src/cr-image/operation/channel_swap.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Swaps channels of `ChannelType` supported by an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.channel_swap(:green, :red) # Crystal autocasting of symbols to Pluto::ChannelType enum is magic\n```\n\"Channel","summary":"
Swaps channels of ChannelType supported by an image
","instance_methods":[{"html_id":"channel_swap(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L12"},"def":{"name":"channel_swap","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"clone.channel_swap!(a, b)"}},{"html_id":"channel_swap!(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap!","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L16"},"def":{"name":"channel_swap!","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"ch_a, ch_b = self[a], self[b]\nself[a] = ch_b\nself[b] = ch_a\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Contrast","path":"CrImage/Operation/Contrast.html","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast","abstract":false,"locations":[{"filename":"src/cr-image/operation/contrast.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Increases contrast of an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.contrast(20)\n```\n\"Contrasted","summary":"
Increases contrast of an image
","instance_methods":[{"html_id":"contrast(value:Float64):self-instance-method","name":"contrast","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L12"},"def":{"name":"contrast","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.contrast!(value)"}},{"html_id":"contrast!(value:Float64):self-instance-method","name":"contrast!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L16"},"def":{"name":"contrast!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"factor = (259 * (value + 255)) / (255 * (259 - value))\neach_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, Math.max(0, (factor * ((channel.unsafe_fetch(index)).to_i - 128)) + 128))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Crop","path":"CrImage/Operation/Crop.html","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop","abstract":false,"locations":[{"filename":"src/cr-image/operation/crop.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Crops an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\n# These calls are equivalent\nimage.crop(40, 30, 80, 80)\nimage[40...120, 30...110]\n```\n\"Cropped","summary":"
Crops an image
","instance_methods":[{"html_id":"[](xrange:Range,yrange:Range):self-instance-method","name":"[]","abstract":false,"args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"args_string":"(xrange : Range, yrange : Range) : self","args_html":"(xrange : Range, yrange : Range) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L22"},"def":{"name":"[]","args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"return_type":"self","visibility":"Public","body":"xstart, xcount = resolve_to_start_and_count(xrange, width)\nystart, ycount = resolve_to_start_and_count(yrange, height)\ncrop(xstart, ystart, xcount, ycount)\n"}},{"html_id":"crop(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : 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self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L14"},"def":{"name":"crop","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop(*region.to_tuple)"}},{"html_id":"crop!(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":32,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L32"},"def":{"name":"crop!","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n  self[channel_type] = (UInt8Map.new(width, channel))[x, new_width, y, new_height].raw\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"Crystal Image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L17"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\nimage.draw_line(50, 50, 70, 90, CrImage::Color.of(\"#0f0\"))\n```\n\"Woman\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"
Draws shapes in the image
","instance_methods":[{"html_id":"draw_circle(x:Int,y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle centered at x, y with radius","summary":"
Draw a circle centered at x, y with radius
","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L59"},"def":{"name":"draw_circle","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(x, y, radius, color, fill: fill)"}},{"html_id":"draw_circle(region:Region,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L54"},"def":{"name":"draw_circle","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":3,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_circle!(center_x:Int,center_y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle!","abstract":false,"args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":68,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L68"},"def":{"name":"draw_circle!","args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"min_x = Math.max(0, center_x - radius)\nmax_x = Math.min(width - 1, center_x + radius)\nmax_y = Math.min(height - 1, center_y + radius)\neach_color_channel do |channel, channel_type|\n  0.upto(radius) do |y|\n    theta_0 = Math.asin((Math.max(0, (    y - 1))) / radius.to_f)\n    theta_1 = Math.asin(y / radius.to_f)\n    x_0 = (radius * (Math.cos(theta_0))).round\n    x_1 = (radius * (Math.cos(theta_1))).round\n    lower_x_outer = (Math.max(min_x, center_x - x_0)).to_i\n    lower_x_inner = (Math.max(min_x, center_x - x_1)).to_i\n    upper_x_outer = (Math.min(max_x, center_x + x_0)).to_i\n    upper_x_inner = (Math.min(max_x, center_x + x_1)).to_i\n    lower_y = center_y - y\n    upper_y = center_y + y\n    lower_y_outside_of_image = (center_y - y) < 0 || (center_y - y) > max_y\n    upper_y_outside_of_image = (center_y + y) < 0 || (center_y + y) > max_y\n    left_outer_x_beyond_right_of_image = (center_x - x_0) > max_x\n    right_outer_x_beyond_left_of_image = (center_x + x_0) < 0\n    left_inner_x_beyond_left_of_image = (center_x - x_1) < 0\n    right_inner_x_beyond_right_of_image = (center_x + x_1) > max_x\n    if fill\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n    else\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, lower_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, upper_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n    end\n  end\nend\nself\n"}},{"html_id":"draw_circle!(region:Region,color:Color,*,fill:Bool=false,radius:Int32|Nil=nil):self-instance-method","name":"draw_circle!","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
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Implementation of http://www.edepot.com/linec.html
","abstract":false,"args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","args_html":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":139,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L139"},"def":{"name":"draw_line!","args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"if (0 <= x1 && x1 < width) && (0 <= y1 && y1 < height)\nelse\n  raise(Exception.new(\"First point (#{x1},#{y1}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nif (0 <= x2 && x2 < width) && (0 <= y2 && y2 < height)\nelse\n  raise(Exception.new(\"Second point (#{x2},#{y2}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nrise_by_height = false\nshort = y2 - y1\nlong = x2 - x1\nif short.abs > long.abs\n  short, long = long, short\n  rise_by_height = true\nend\nend_val = long\ngradient = long == 0 ? short : short / long.abs.to_f\nif rise_by_height\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + jump.to_i, y1 + i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nelse\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + i, y1 + jump.to_i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L22"},"def":{"name":"draw_square","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"clone.draw_square!(x, y, box_width, box_height, color, fill: fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L18"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L30"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n  raise(\"Box dimensions extend #{((x + box_width) - width) + 1} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n  raise(\"Box dimensions extend #{((y + box_height) - height) + 1} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_color_channel do |channel, channel_type|\n  channel[(  (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  box_height.times do |i|\n    if i == 0\n      next\n    end\n    if fill\n      channel[(      ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n        color[channel_type]\n      end\n    else\n      channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n      channel.unsafe_put(((((y_i + i) * width) + x_i) + box_width) - 1, color[channel_type])\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":26,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L26"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Applies a 3x3 Gaussian blur.
","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n  w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n  sizes << (if i < m\n    w_l\n  else\n    w_l + 2\n  end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"
Provides methods for histogram and histogram equalization.
","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":107,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L107"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":111,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L111"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":115,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L115"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_color_channel do |channel, channel_type|\n  if channel_type.alpha?\n    next\n  end\n  remap = (histogram(channel_type)).equalize\n  size.times do |i|\n    channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n  end\nend\nself\n"}}],"types":[{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"
A histogram of an Image for a specific ChannelType
","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L24"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"
Get the cumulative distribution for the image's histogram
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L56"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n  original = total\n  total = total + probability\n  {pixel, original}\nend.to_h)\n"}},{"html_id":"channel_type:CrImage::ChannelType-instance-method","name":"channel_type","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"channel_type","visibility":"Public","body":"@channel_type"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"
Get the raw counts for a given pixel value (0-255) in the image
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L30"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"
Remap the cumalitive distribution of pixels to get a new, more spread out pixel value
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L66"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n  {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"image:CrImage::Image-instance-method","name":"image","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"image","visibility":"Public","body":"@image"}},{"html_id":"mean:Float64-instance-method","name":"mean","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L74"},"def":{"name":"mean","return_type":"Float64","visibility":"Public","body":"@mean || (@mean = counts.sum do |pixel, count|\n  pixel.to_i64 * count\nend.to_f64 / @image.size)"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"
Get pixel counts normalized - all values between 0.0 and 1.0
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":47,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L47"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n  {pixel, count.to_f / @image.size}\nend.to_h"}},{"html_id":"std_dev:Float64-instance-method","name":"std_dev","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":80,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L80"},"def":{"name":"std_dev","return_type":"Float64","visibility":"Public","body":"@std_dev || (@std_dev = Math.sqrt(counts.sum do |value, count|\n  count * ((value.to_i64 - mean) ** 2)\nend.to_f64 / @image.size))"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the horizontal axis
","instance_methods":[{"html_id":"horizontal_blur(k:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(k)"}},{"html_id":"horizontal_blur!(k:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((k + k) + 1)\neach_color_channel do |channel|\n  @height.times do |y|\n    center_index : Int32 = y * @width\n    left__bound : Int32 = center_index\n    right_bound : Int32 = center_index + k\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last__value : Int32 = (channel.unsafe_fetch((center_index + @width) - 1)).to_i\n    current_sum : Int32 = (k + 1) * first_value\n    (0..(k - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + i))\n    end\n    (0..k).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      center_index = center_index + 1\n    end\n    ((k + 1)..((@width - k) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n    ((@width - k)..(@width - 1)).each do\n      current_sum = current_sum + (last__value - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |pixel, channel_type, x, y|\n  Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"
Apply a mask to an image
","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"
Black out all pixels but those found in the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"
Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"
TODO  add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? pixel : 0_u8\n  end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? (block.call(pixel, channel_type, i % width, i // width)) || pixel : pixel\n  end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"
Change the color of all pixels that match the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, channel_type|\n  color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/Pad","path":"CrImage/Operation/Pad.html","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad","abstract":false,"locations":[{"filename":"src/cr-image/operation/pad.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Pads an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.pad(left: 50, right: 50)\nimage.pad(left: 50, right: 50, pad_type: CrImage::EdgePolicy::Repeat)\n```\n\"Picture\n\"Picture","summary":"
Pads an image
","instance_methods":[{"html_id":"pad(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L14"},"def":{"name":"pad","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.pad!(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type)"}},{"html_id":"pad!(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad!","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L18"},"def":{"name":"pad!","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"orig_width = width\neach_channel do |channel, channel_type|\n  padded = (UInt8Map.new(orig_width, channel)).pad(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type, pad_black_value: channel_type.default)\n  self[channel_type] = padded.raw\n  @width = padded.width\n  @height = padded.height\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Rotate","path":"CrImage/Operation/Rotate.html","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate","abstract":false,"locations":[{"filename":"src/cr-image/operation/rotate.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Rotates an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.rotate(45)\nimage.rotate(45, pad: true)\n```\n\"Rotated\n\"Rotated","summary":"
Rotates an image
","instance_methods":[{"html_id":"rotate(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate","doc":"Rotates an image by `degrees`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L20"},"def":{"name":"rotate","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.rotate!(degrees, center_x: center_x, center_y: center_y, radius: radius, pad: pad, pad_type: pad_type)"}},{"html_id":"rotate!(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate!","doc":"Rotates an image by `degrees`. Modifies `self`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees.
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L38"},"def":{"name":"rotate!","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"if pad_type.none?\n  raise(Exception.new(\"Edge policy None doesn't apply to rotation\"))\nend\nif pad && radius >= 0\n  raise(Exception.new(\"Can't pad image and limit rotation by radius\"))\nend\nradians = ((-Math::PI) * degrees) / 180\nsin = Math.sin(radians)\ncos = Math.cos(radians)\nradius_sq = radius * radius\nnew_width, new_size, out_center_x, out_center_y = output_dimensions(pad, degrees, center_x, center_y)\neach_channel do |channel, channel_type|\n  new_x = -1\n  new_y = 0\n  self[channel_type] = Array.new(new_size) do |i|\n    new_x = new_x + 1\n    if new_x == new_width\n      new_x = 0\n      new_y = new_y + 1\n    end\n    if radius >= 0 && (((new_x - center_x) ** 2) + ((new_y - center_y) ** 2)) > radius_sq\n      next channel.unsafe_fetch(i)\n    end\n    orig_x = (((cos * (new_x - out_center_x)) - (sin * (new_y - out_center_y))) + center_x).round.to_i\n    orig_y = (((sin * (new_x - out_center_x)) + (cos * (new_y - out_center_y))) + center_y).round.to_i\n    if pad_type.black?\n      if ((orig_x < 0 || orig_x >= width) || orig_y < 0) || orig_y >= height\n        next channel_type.default\n      end\n    else\n      orig_x = orig_x.clamp(0, width - 1)\n      orig_y = orig_y.clamp(0, height - 1)\n    end\n    channel.unsafe_fetch((orig_y * width) + orig_x)\n  end\nend\n@width = new_width\n@height = new_size // new_width\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the vertical axis
","instance_methods":[{"html_id":"vertical_blur(value:Int32):self-instance-method","name":"vertical_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L14"},"def":{"name":"vertical_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.vertical_blur!(value)"}},{"html_id":"vertical_blur!(value:Int32):self-instance-method","name":"vertical_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L18"},"def":{"name":"vertical_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_color_channel do |channel|\n  @width.times do |x|\n    center_index : Int32 = x\n    left_bound : Int32 = center_index\n    right_bound : Int32 = center_index + (value * @width)\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last_value : Int32 = (channel.unsafe_fetch(center_index + (@width * (@height - 1)))).to_i\n    current_sum : Int32 = (value + 1) * first_value\n    (0..(value - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + (i * @width)))\n    end\n    (0..value).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((value + 1)..((@height - value) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((@height - value)..(@height - 1)).each do\n      current_sum = current_sum + (last_value - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      center_index = center_index + @width\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]}]},{"html_id":"Crystal Image/CrImage/Region","path":"CrImage/Region.html","kind":"struct","full_name":"CrImage::Region","name":"Region","abstract":false,"superclass":{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},"ancestors":[{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/region.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Represents a rectangular area on an `Image` from its upper left corner `x` and `y` coordinates, and a `width` and `height`.\n\nSee `Operation::Crop#crop` and `Operation::Draw#draw_square` for examples using it.","summary":"
Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.
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Return the {x, y} tuple of the center coordinates of this Region
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Read image_data as JPEG encoded bytes
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Construct an Image from reading in bytes from io
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Read image_data and PNG encoded bytes
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Construct an Image by reading bytes from io
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Read image_data as PPM encoded bytes
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Read bytes from io as PPM encoded
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Read image_data as WebP encoded bytes
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Read bytes from io as WebP encoded
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Set the corresponding channel_type with channel
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Return the alpha channel
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Return the blue channel
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Create a copy of this image
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Run provided block with the ChannelType::Red, ChannelType::Green, and ChannelType::Blue channels.
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Run provided block with the ChannelType::Red, ChannelType::Green, and ChannelType::Blue channels.
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Return the green channel
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Height of image
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Return the red channel
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Return the number of pixels in this image
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Convert color image to GrayscaleImage, using the NTSC formula as default values.
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Image/Pluto/Operation/VerticalBlur","kind":"module","full_name":"Pluto::Operation::VerticalBlur","name":"VerticalBlur"}],"namespace":{"html_id":"Crystal Image/Pluto","kind":"module","full_name":"Pluto","name":"Pluto"},"instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","doc":"Con","summary":"
Con
","abstract":false,"location":{"filename":"src/pluto.cr","line_number":23,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/pluto.cr#L23"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"CrImage::RGBAImage.new(red.clone, green.clone, blue.clone, alpha.clone, width, height)"}}]}]},{"html_id":"Crystal Image/StumpyCore","path":"StumpyCore.html","kind":"module","full_name":"StumpyCore","name":"StumpyCore","abstract":false,"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":3,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/canvas.cr#L3"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba.cr#L4"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/mixing.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/mixing.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/utils.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/utils.cr#L1"},{"filename":"src/stumpy.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"A module owned by [StumpyCr](https://github.com/stumpycr/stumpy_core)","summary":"
A module owned by StumpyCr
","types":[{"html_id":"Crystal Image/StumpyCore/Canvas","path":"StumpyCore/Canvas.html","kind":"class","full_name":"StumpyCore::Canvas","name":"Canvas","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":31,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/canvas.cr#L31"},{"filename":"src/stumpy.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L6"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/StumpyCore","kind":"module","full_name":"StumpyCore","name":"StumpyCore"},"doc":"A canvas is 2D array of `RGBA` pixels\n\nTo create a canvas of size `400` x `200`\n\n```\ncanvas = StumpyCore::Canvas.new(400, 200)\n```\n\nThe default background color is transparent,\nbut it can be passed in as a parameter or as a block\nthat returns the color value for each `{x, y}` pair.\n\n```\ncanvas2 = StumpyCore::Canvas.new(400, 200, RGBA::WHITE)\n```\n\n```\ncanvas3 = StumpyCore::Canvas.new(256, 256) do |x, y|\n  RGBA.from_rgb_n(x, y, 255, 8)\nend\n```\n![image](https://github.com/stumpycr/stumpy_core/blob/feature/images/rainbow.png?raw=true)\n\nBecause of the way pixels are stored in a `Slice`,\n`Canvas`es are limited to `Int32::MAX = 2147483647` pixels in total,\ne.g. a maximal size of 46340x46340 for a square image.","summary":"
A canvas is 2D array of RGBA pixels
","instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","abstract":false,"location":{"filename":"src/stumpy.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L7"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"size = width * height\nred = Array(UInt8).new(size)\ngreen = Array(UInt8).new(size)\nblue = Array(UInt8).new(size)\nalpha = Array(UInt8).new(size)\neach_row do |row|\n  row.each do |rgba|\n    red << (rgba.r >> 8).to_u8\n    green << (rgba.g >> 8).to_u8\n    blue << (rgba.b >> 8).to_u8\n    alpha << (rgba.a >> 8).to_u8\n  end\nend\nCrImage::RGBAImage.new(red, green, blue, alpha, width, height)\n"}}]}]},{"html_id":"Crystal Image/Tutorial","path":"Tutorial.html","kind":"module","full_name":"Tutorial","name":"Tutorial","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/chromakey_tutorial.cr#L35"},{"filename":"src/tutorials/tutorial.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/tutorial.cr#L7"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This fictional module exists to provide tutorials for using CrImage in the documentation\n\nSee:\n* `EdgeDetection`\n* `ChromaKey`\n* `FindDifferences`","summary":"
This fictional module exists to provide tutorials for using CrImage in the documentation
","types":[{"html_id":"Crystal Image/Tutorial/ChromaKey","path":"Tutorial/ChromaKey.html","kind":"module","full_name":"Tutorial::ChromaKey","name":"ChromaKey","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/chromakey_tutorial.cr#L35"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can swap out the background by creating a mask representing the pixels that are close in color, and replacing them using an `MaskApply#apply_color` method.\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"sample.jpg\")\n\n# Grab a color from the background, for comparison\nbackground = image[10, 10]\n\n# Construct a mask of all pixels within a color distance of our background\nbackground_mask = image.mask_from do |color|\n  # 25 chosen through trial-and-error\n  color.dist(background) < 25\nend\n  .closing! # Remove small `true` regions\n  .opening! # Remove small `false` regions\n\n# Now make the background blue\nimage\n  .apply_color(background_mask, CrImage::Color.of(\"#0000cc\"))\n  .save(\"chromakey.jpg\")\n```\n\nResults in image:\n\n\"Background\n\nThis script ran on my machine in `4ms` in `--release` mode.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/EdgeDetection","path":"Tutorial/EdgeDetection.html","kind":"module","full_name":"Tutorial::EdgeDetection","name":"EdgeDetection","abstract":false,"locations":[{"filename":"src/tutorials/edge_detection_tutorial.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/edge_detection_tutorial.cr#L38"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can run the [Sobel Operator](https://en.wikipedia.org/wiki/Sobel_operator) to detect edges in it:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nvertical_sobel = CrImage::IntMap.new([\n  [-1, -2, -1],\n  [0, 0, 0],\n  [1, 2, 1],\n])\n\nhorizontal_sobel = CrImage::IntMap.new([\n  [-1, 0, 1],\n  [-2, 0, 2],\n  [-1, 0, 1],\n])\n\nimage = CrImage::GrayscaleImage.open(\"sample.jpg\")\n\ndx = image.cross_correlate(horizontal_sobel)\ndy = image.cross_correlate(vertical_sobel)\n\n(dx ** 2 + dy ** 2).to_gray(scale: true).save(\"edge_detection.jpg\")\n```\n\nResults in image:\n\n\"Black\n\nThis script ran on my machine in `11ms` in `--release` mode.\n\n**Note**: This tutorial is using `cross_correlate`. For large images (or medium-to-large operators), the `cross_correlate_fft` may perform better.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/FindDifferences","path":"Tutorial/FindDifferences.html","kind":"module","full_name":"Tutorial::FindDifferences","name":"FindDifferences","abstract":false,"locations":[{"filename":"src/tutorials/find_differences.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/find_differences.cr#L55"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `differences.jpg` image:\n\n\"Two\n\nWe can programatically detect _most_ of the differences between these two images:\n\n```\nrequire \"../../src/cr-image\"\nrequire \"../../src/all_formats\"\n\nimage = CrImage::RGBAImage.open(\"differences.jpg\")\nret = image.clone\n\n# Perform a blur to remove random noise\nimg1 = image.gaussian_blur(1)[2...340, ..]\nimg2 = image.gaussian_blur(1)[361...699, ..]\n\n# Convert each color channel into a IntMap\nred_img1 = CrImage::UInt8Map.new(img1.width, img1.red).to_i\ngre_img1 = CrImage::UInt8Map.new(img1.width, img1.green).to_i\nblu_img1 = CrImage::UInt8Map.new(img1.width, img1.blue).to_i\nred_img2 = CrImage::UInt8Map.new(img2.width, img2.red).to_i\ngre_img2 = CrImage::UInt8Map.new(img2.width, img2.green).to_i\nblu_img2 = CrImage::UInt8Map.new(img2.width, img2.blue).to_i\n\n# Calculate a pixel by pixel difference calculation, convert it to a `Mask`\nred_mask = (red_img1 - red_img2).abs.>(50)\ngre_mask = (gre_img1 - gre_img2).abs.>(50)\nblu_mask = (blu_img1 - blu_img2).abs.>(50)\n\n# Combine the different color channel masks\ncombo_mask = (red_mask | blu_mask | gre_mask).dilate!\n\n# Expensive way to make a thick box.\n3.times do\n  combo_mask.dilate!.segments.each do |v|\n    # Draw a box in the first image\n    ret.draw_square!(v.region.x + 2, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n    # ... and the second image\n    ret.draw_square!(v.region.x + 361, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n  end\nend\n\nret.save(\"differences_end.jpg\")\n```\n\nResults in image:\n\n\"Two\n\nThis script ran on my machine in `66ms` in `--release` mode.\n\n**NOTE**: There's a difference in the seeds on one of the watermelons that don't survive the blurring process, and so aren't picked\nup by the differences algorithm above.","summary":"
Given differences.jpg image:
"}]}]}}
\ No newline at end of file
+{"repository_name":"Crystal Image","body":"
Crystal Image (Processing)
\n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here originated as a fork from [Pluto](https://github.com/phenopolis/pluto) and further takes inspiration from [Stumpy](https://github.com/stumpycr/stumpy_core),\nand support converting to and from both of those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n   ```yaml\n   dependencies:\n     cr-image:\n       github: vici37/cr-image\n   ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n  .to_gray\n  .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n  moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See the tutorials](http://troy.sornson.io/cr-image/Tutorial.html) for more examples.\n\n### [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core) Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n**NOTE:** Currently Pluto and CrImage share the same bindings for `libturbojpeg`, `libspng`, and `libwebp`. If you\nuse Pluto, you _cannot_ use those formats from CrImage.\n\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n**NOTE:** Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image.cr#L20"},{"filename":"src/cr-image/edge_policy.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/edge_policy.cr#L1"},{"filename":"src/cr-image/map.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L1"},{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L1"},{"filename":"src/cr-image/window_view.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/pluto.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L35"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This module by itself isn't very interesting. Try taking a look through the [tutorials](./Tutorial.html) for better examples.","summary":"
This module by itself isn't very interesting.
","types":[{"html_id":"Crystal Image/CrImage/BlackView","path":"CrImage/BlackView.html","kind":"class","full_name":"CrImage::BlackView(T)","name":"BlackView","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},"ancestors":[{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/window_view.cr","line_number":76,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L76"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An implementation of `Window`, where the value of a point in the window that is off the edge of the underlying `Map` resolves to zero (or black)","summary":"
An implementation of Window, where the value of a point in the window that is off the edge of the underlying Map resolves to zero (or black)
","constructors":[{"html_id":"new(width,height,map,map_x,map_y)-class-method","name":"new","abstract":false,"args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"args_string":"(width, height, map, map_x, map_y)","args_html":"(width, height, map, map_x, map_y)","location":{"filename":"src/cr-image/window_view.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L17"},"def":{"name":"new","args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"visibility":"Public","body":"_ = BlackView(T).allocate\n_.initialize(width, height, map, map_x, map_y)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"[](x:Int32,y:Int32):T-instance-method","name":"[]","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32) : T","args_html":"(x : Int32, y : Int32) : T","location":{"filename":"src/cr-image/window_view.cr","line_number":77,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L77"},"def":{"name":"[]","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"return_type":"T","visibility":"Public","body":"adjusted_x = (x - @half_width) + @map_x\nadjusted_y = (y - @half_height) + @map_y\nif (adjusted_x < 0 || adjusted_x >= @map.width) || (adjusted_y < 0 || adjusted_y >= @map.height)\n  return T.zero\nend\n@map[(adjusted_y * @map.width) + adjusted_x]\n"}}]},{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_color_channel` and `GrayscaleImage#each_color_channel`","summary":"
Enum representing different image channels supported by CrImage
","instance_methods":[{"html_id":"alpha?-instance-method","name":"alpha?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":9,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L9"},"def":{"name":"alpha?","visibility":"Public","body":"self == Alpha"}},{"html_id":"blue?-instance-method","name":"blue?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L7"},"def":{"name":"blue?","visibility":"Public","body":"self == Blue"}},{"html_id":"default:UInt8-instance-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L11"},"def":{"name":"default","return_type":"UInt8","visibility":"Public","body":"alpha? ? 255_u8 : 0_u8"}},{"html_id":"gray?-instance-method","name":"gray?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L8"},"def":{"name":"gray?","visibility":"Public","body":"self == Gray"}},{"html_id":"green?-instance-method","name":"green?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L6"},"def":{"name":"green?","visibility":"Public","body":"self == Green"}},{"html_id":"red?-instance-method","name":"red?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L5"},"def":{"name":"red?","visibility":"Public","body":"self == Red"}}]},{"html_id":"Crystal Image/CrImage/Color","path":"CrImage/Color.html","kind":"class","full_name":"CrImage::Color","name":"Color","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/color.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Utility class for parsing and representing colors that can be used for certain\nmethods in CrImage.\n\nSee `Operation::MaskApply#apply_color`, `Operation::Draw#draw_square`, or `Operation::Draw#draw_circle`","summary":"
Utility class for parsing and representing colors that can be used for certain methods in CrImage.
","constructors":[{"html_id":"default:Color-class-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L11"},"def":{"name":"default","return_type":"Color","visibility":"Public","body":"new(ChannelType::Red.default, ChannelType::Green.default, ChannelType::Blue.default, ChannelType::Alpha.default)"}},{"html_id":"new(red:UInt8,green:UInt8,blue:UInt8,alpha:UInt8=ChannelType::Alpha.default)-class-method","name":"new","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"args_string":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","args_html":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","location":{"filename":"src/cr-image/color.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L8"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"visibility":"Public","body":"_ = allocate\n_.initialize(red, green, blue, alpha)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"of(color:String):Color-class-method","name":"of","doc":"Parse color from a hex string:\n\n```\nColor.of(\"#1\")        # same as \"#11\" => Color.new(17, 17, 17, 255)\nColor.of(\"#01\")       # => Color.new(1, 1, 1, 255)\nColor.of(\"#123\")      # same as \"#112233\" => Color.new(17, 34, 51, 255)\nColor.of(\"#1234\")     # same as \"#11223344\" => Color.new(34, 51, 68, 17)\nColor.of(\"#010203\")   # => Color.new(1, 2, 3, 255)\nColor.of(\"#01020304\") # => Color.new(2, 3, 4, 1)\n```","summary":"
Parse color from a hex string:
","abstract":false,"args":[{"name":"color","external_name":"color","restriction":"String"}],"args_string":"(color : String) : Color","args_html":"(color : String) : Color","location":{"filename":"src/cr-image/color.cr","line_number":49,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L49"},"def":{"name":"of","args":[{"name":"color","external_name":"color","restriction":"String"}],"return_type":"Color","visibility":"Public","body":"if ((!(color.starts_with?(\"#\"))) || (!({2, 3, 4, 5, 7, 9}.includes?(color.size)))) || (color.match(/^#[^0-9a-f]/i))\n  raise(\"Invalid hex color '#{color}': must start with '#' followed by 1, 2, 3, 4, 6, or 9 alphanumeric characters (0-9 or a-f)\")\nend\ncase color.size\nwhen 2\n  gray = (color[1].to_i(16)).to_u8\n  gray = (gray << 4) + gray\n  self.new(gray, gray, gray)\nwhen 3\n  gray = (color[1, 2].to_i(16)).to_u8\n  self.new(gray, gray, gray)\nwhen 4\n  red = (color[1].to_i(16)).to_u8\n  green = (color[2].to_i(16)).to_u8\n  blue = (color[3].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue)\nwhen 5\n  alpha = (color[1].to_i(16)).to_u8\n  red = (color[2].to_i(16)).to_u8\n  green = (color[3].to_i(16)).to_u8\n  blue = (color[4].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue, (alpha << 4) + alpha)\nwhen 7\n  red = (color[1, 2].to_i(16)).to_u8\n  green = (color[3, 2].to_i(16)).to_u8\n  blue = (color[5, 2].to_i(16)).to_u8\n  self.new(red, green, blue)\nelse\n  alpha = (color[1, 2].to_i(16)).to_u8\n  red = (color[3, 2].to_i(16)).to_u8\n  green = (color[5, 2].to_i(16)).to_u8\n  blue = (color[7, 2].to_i(16)).to_u8\n  self.new(red, green, blue, alpha)\nend\n"}},{"html_id":"random:Color-class-method","name":"random","doc":"Generate a random color with full (255) opacity","summary":"
Generate a random color with full (255) opacity
","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L16"},"def":{"name":"random","return_type":"Color","visibility":"Public","body":"r = Random.new\nnew(r.rand(UInt8), r.rand(UInt8), r.rand(UInt8), ChannelType::Alpha.default)\n"}}],"instance_methods":[{"html_id":"==(other:Color):Bool-instance-method","name":"==","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"}],"args_string":"(other : Color) : Bool","args_html":"(other : Color) : Bool","location":{"filename":"src/cr-image/color.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L93"},"def":{"name":"==","args":[{"name":"other","external_name":"other","restriction":"Color"}],"return_type":"Bool","visibility":"Public","body":"(((red == other.red) && (green == other.green)) && (blue == other.blue)) && (alpha == other.alpha)"}},{"html_id":"[](channel_type:ChannelType):UInt8-instance-method","name":"[]","doc":"Receive the UInt8 portion of this color corresponding to `channel_type`","summary":"
Receive the UInt8 portion of this color corresponding to channel_type
","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : UInt8","args_html":"(channel_type : ChannelType) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L29"},"def":{"name":"[]","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"UInt8","visibility":"Public","body":"case channel_type\nin ChannelType::Red\n  red\nin ChannelType::Green\n  green\nin ChannelType::Blue\n  blue\nin ChannelType::Alpha\n  alpha\nin ChannelType::Gray\n  gray\nend"}},{"html_id":"alpha:UInt8-instance-method","name":"alpha","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"alpha","visibility":"Public","body":"@alpha"}},{"html_id":"blue:UInt8-instance-method","name":"blue","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"blue","visibility":"Public","body":"@blue"}},{"html_id":"dist(other:Color,*,manhattan:Bool=false):Float64-instance-method","name":"dist","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"args_string":"(other : Color, *, manhattan : Bool = false) : Float64","args_html":"(other : Color, *, manhattan : Bool = false) : Float64","location":{"filename":"src/cr-image/color.cr","line_number":100,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L100"},"def":{"name":"dist","args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"splat_index":1,"return_type":"Float64","visibility":"Public","body":"if manhattan\n  ((red.to_f - other.red).abs + (blue.to_i - other.blue).abs) + (green.to_i - other.green).abs\nelse\n  Math.sqrt((((red.to_i - other.red) ** 2) + ((green.to_i - other.green) ** 2)) + ((blue.to_i - other.blue) ** 2))\nend"}},{"html_id":"gray(red_multiplier:Float=0.299,green_multiplier:Float=0.587,blue_multiplier:Float=0.114):UInt8-instance-method","name":"gray","doc":"Convert this Color to a single UInt8 gray value","summary":"
Convert this Color to a single UInt8 gray value
","abstract":false,"args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"args_string":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","args_html":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L22"},"def":{"name":"gray","args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"return_type":"UInt8","visibility":"Public","body":"Math.min(255_u8, (((red * red_multiplier) + (blue * blue_multiplier)) + (green * green_multiplier)).to_u8)"}},{"html_id":"green:UInt8-instance-method","name":"green","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"green","visibility":"Public","body":"@green"}},{"html_id":"red:UInt8-instance-method","name":"red","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"red","visibility":"Public","body":"@red"}}]},{"html_id":"Crystal Image/CrImage/ComplexMap","path":"CrImage/ComplexMap.html","kind":"class","full_name":"CrImage::ComplexMap","name":"ComplexMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":606,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L606"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"instance_methods":[{"html_id":"ifft:FloatMap-instance-method","name":"ifft","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":609,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L609"},"def":{"name":"ifft","return_type":"FloatMap","visibility":"Public","body":"FloatMap.new(width, (FftUtil.ifft2d(width, raw)).map(&.real))"}},{"html_id":"to_c:ComplexMap-instance-method","name":"to_c","doc":"Convert this `Map` to a `ComplexMap`","summary":"
Convert this Map to a ComplexMap
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A general enum for determining behavior around edges of Image or Maps.
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Utility class for Fast Fourier Transforms
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Perform Fast Fourier Transform on inp.
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Perform Fast Fourier Transform on inp.
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Calculates Fast Fourier Transform of ret.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, using and rewriting ret for the output, as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L28"},"def":{"name":"fft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.fft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.fft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}},{"html_id":"ifft1d(inp:Array(Complex),buffer:Array(Complex)=inp.dup):Array(Complex)-class-method","name":"ifft1d","doc":"Perform Inverse Fast Fourier Transform on `inp`.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`.","summary":"
Perform Inverse Fast Fourier Transform on inp.
","abstract":false,"args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","args_html":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":165,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L165"},"def":{"name":"ifft1d","args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"if inp.size == inp.size.next_power_of_two\nelse\n  raise(Exception.new(\"Input is of size #{inp.size}, which is not a power of 2 (next power of 2: #{inp.size.next_power_of_two})\"))\nend\nFftUtil.ifft1d_unsafe(inp.dup, buffer)\n"}},{"html_id":"ifft1d_unsafe(ret:Array(Complex)|Slice(Complex),buffer:Array(Complex)=ret.dup):Array(Complex)|Slice(Complex)-class-method","name":"ifft1d_unsafe","doc":"Perform Inverse Fast Fourier Transform on `ret`. Will use and overwrite the original values in `ret` to do so.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`. This method makes no bound checks or error checks.","summary":"
Perform Inverse Fast Fourier Transform on ret.
","abstract":false,"args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","args_html":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":173,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L173"},"def":{"name":"ifft1d_unsafe","args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex) | Slice(Complex)","visibility":"Public","body":"shape = 1\nhalf = ret.size\nreal_half = (ret.size >> 1)\nwhile half > 1\n  double_half = half\n  half = half >> 1\n  neg_i_pi_div_shape = Math::PI.i / shape\n  buffer.to_unsafe.copy_from(ret.to_unsafe, ret.size)\n  half_offset = half\n  shape.times do |i|\n    term = Math.exp(neg_i_pi_div_shape * i)\n    half.times do |j|\n      offset = j + half_offset\n      buffer.unsafe_put(offset, (buffer.unsafe_fetch(offset)) * term)\n    end\n    half_offset = half_offset + double_half\n  end\n  offset = -1\n  counter = -1\n  real_half.times do |i|\n    offset = offset + 1\n    counter = counter + 1\n    if counter == half\n      counter = 0\n      offset = offset + half\n    end\n    ret.unsafe_put(i, (buffer.unsafe_fetch(offset)) + (buffer.unsafe_fetch(offset + half)))\n    ret.unsafe_put(i + real_half, (buffer.unsafe_fetch(offset)) - (buffer.unsafe_fetch(offset + half)))\n  end\n  shape = shape << 1\nend\nret.map!(&./(ret.size))\n"}},{"html_id":"ifft2d(width:Int32,inp:Array(Complex),buffer:Array(Complex)|Nil=nil):Array(Complex)-class-method","name":"ifft2d","doc":"Perform Inverse Fast Fourier Transform, treating as `inp` as a 2 dimensional array with `width`.\n\nCan optionally pass in `buffer` which must be an array at least the larger of `width` or `inp.size // width`.","summary":"
Perform Inverse Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"args_string":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","args_html":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":124,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L124"},"def":{"name":"ifft2d","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"return_type":"Array(Complex)","visibility":"Public","body":"if width == width.next_power_of_two\nelse\n  raise(Exception.new(\"Width #{width} must be power of 2 (next power of two: #{width.next_power_of_two})\"))\nend\nheight = inp.size // width\nif height == height.next_power_of_two\nelse\n  raise(Exception.new(\"Input height #{height} must be power of 2 (next power of two: #{(height).next_power_of_two})\"))\nend\nif buf = buffer\nelse\n  buf = Array(Complex).new(Math.max(width, inp.size // width)) do\n    Complex.zero\n  end\nend\nFftUtil.ifft2d_unsafe(width, inp.dup, buf)\n"}},{"html_id":"ifft2d_unsafe(width:Int32,ret:Array(Complex),buffer:Array(Complex)):Array(Complex)-class-method","name":"ifft2d_unsafe","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":135,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L135"},"def":{"name":"ifft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.ifft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.ifft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}}]},{"html_id":"Crystal Image/CrImage/FloatMap","path":"CrImage/FloatMap.html","kind":"class","full_name":"CrImage::FloatMap","name":"FloatMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":508,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L508"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Implementation of `MapImpl` for `Float64` types.","summary":"
Implementation of MapImpl for Float64 types.
","instance_methods":[{"html_id":"to_f:FloatMap-instance-method","name":"to_f","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":519,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L519"},"def":{"name":"to_f","return_type":"FloatMap","visibility":"Public","body":"self"}},{"html_id":"to_f64:self-instance-method","name":"to_f64","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":511,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L511"},"def":{"name":"to_f64","return_type":"self","visibility":"Public","body":"self"}},{"html_id":"to_i:IntMap-instance-method","name":"to_i","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":515,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L515"},"def":{"name":"to_i","return_type":"IntMap","visibility":"Public","body":"IntMap.new(width, @raw.map(&.to_i))"}}],"macros":[{"html_id":"method_missing(call)-macro","name":"method_missing","abstract":false,"args":[{"name":"call","external_name":"call","restriction":""}],"args_string":"(call)","args_html":"(call)","location":{"filename":"src/cr-image/map.cr","line_number":509,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L509"},"def":{"name":"method_missing","args":[{"name":"call","external_name":"call","restriction":""}],"visibility":"Public","body":"          def \n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n : self\n            self.class.new(width, @raw.map(&.\n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n))\n          \nend\n        \n"}}]},{"html_id":"Crystal Image/CrImage/Format","path":"CrImage/Format.html","kind":"module","full_name":"CrImage::Format","name":"Format","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"constants":[{"id":"SUPPORTED_FORMATS","name":"SUPPORTED_FORMATS","value":"[{extension: \".ppm\", method: \"ppm\"}, {extension: \".jpeg\", method: \"jpeg\"}, {extension: \".jpg\", method: \"jpeg\"}, {extension: \".png\", method: \"png\"}, {extension: \".webp\", method: \"webp\"}] of Nil"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Provides a convenience method for saving image files to the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage.save(\"image.jpg\")\n```\nSee `Open` for a convenience method to read images from the filesystem","summary":"
Provides a convenience method for saving image files to the filesystem.
","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"
Provides methods to read from and write to jpeg.
","instance_methods":[{"html_id":"to_jpeg(io:IO,quality:Int32=100):Nil-instance-method","name":"to_jpeg","doc":"Output the image as JPEG to `io`","summary":"
Output the image as JPEG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, quality : Int32 = 100) : Nil","args_html":"(io : IO, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/jpeg.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/jpeg.cr#L74"},"def":{"name":"to_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"return_type":"Nil","visibility":"Public","body":"handle = LibJPEGTurbo.init_compress\nimage_data = IO::Memory.new(size * 3)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\nend\nbuffer = Pointer(UInt8).null\ncheck_jpeg(handle, LibJPEGTurbo.compress2(handle, image_data.buffer, @width, 0, @height, LibJPEGTurbo::PixelFormat::RGB, pointerof(buffer), out size, LibJPEGTurbo::Subsampling::S444, quality, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibJPEGTurbo.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/open.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"
Provides a convenience method for opening up image files from the filesystem.
","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"
Reads this image from file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n    case filename\n    {% for format in SUPPORTED_FORMATS %}\n      when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n    {% end %}\n      else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n  __arg0[:extension].id\nend.join(\", \")).id }}\"\n    end\n    {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"
Provides methods to read from and write to PNG.
","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"
Output the image as PNG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"
Provides methods to read from and write to PPM.
","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"
Output this image to io using PPM image encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n  io.write_byte(red.unsafe_fetch(index))\n  io.write_byte(green.unsafe_fetch(index))\n  io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"
Write this image to file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n  {% if true %}\n        case filename\n        {% for format in SUPPORTED_FORMATS %}\n          when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n        {% end %}\n          else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n    __arg0[:extension].id\n  end.join(\", \")).id }}\"\n        end\n        {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"
Provides methods to read from and write to WebP.
","instance_methods":[{"html_id":"to_webp(io:IO,*,lossy:Bool=false,quality:Int32=100):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"
Write image to io using WebP encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","args_html":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/webp.cr#L59"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"splat_index":1,"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nsize, buffer = lossy ? lossy_encode(image_data, quality) : lossless_encode(image_data)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/grayscale_image.cr#L13"},{"filename":"src/jpeg.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/jpeg.cr#L4"},{"filename":"src/pluto.cr","line_number":42,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L42"},{"filename":"src/png.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/png.cr#L4"},{"filename":"src/stumpy.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L38"},{"filename":"src/webp.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/webp.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"
An image in Grayscale.
","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"
Read image_data as JPEG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_jpeg","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"handle = LibJPEGTurbo.init_decompress\ncheck_jpeg(handle, LibJPEGTurbo.decompress_header3(handle, image_data, image_data.size, out width, out height, out _subsampling, out _colorspace))\nbuffer = Bytes.new((width * height) * 3, 0)\ncheck_jpeg(handle, LibJPEGTurbo.decompress2(handle, image_data, LibC::ULong.new(image_data.size), buffer, width, 0, height, LibJPEGTurbo::PixelFormat::RGB, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nred = Array.new(width * height) do\n  ChannelType::Red.default\nend\ngreen = Array.new(width * height) do\n  ChannelType::Green.default\nend\nblue = Array.new(width * height) do\n  ChannelType::Blue.default\nend\nalpha = Array.new(width * height) do\n  ChannelType::Alpha.default\nend\n(width * height).times do |index|\n  red.unsafe_put(index, buffer[index * 3])\n  green.unsafe_put(index, buffer[(index * 3) + 1])\n  blue.unsafe_put(index, buffer[(index * 3) + 2])\nend\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_jpeg(io:IO):self-class-method","name":"from_jpeg","doc":"Construct an Image from reading in bytes from `io`","summary":"
Construct an Image from reading in bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_jpeg(io.getb_to_end)"}},{"html_id":"from_png(image_data:Bytes):self-class-method","name":"from_png","doc":"Read `image_data` and PNG encoded bytes","summary":"
Read image_data and PNG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_png","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"ctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::None)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_png_buffer(ctx, image_data, image_data.size)\ncheck_png(LibSPNG.get_ihdr(ctx, out ihdr))\ncheck_png(LibSPNG.decoded_image_size(ctx, LibSPNG::Format::RGBA8, out image_size))\nimage = Bytes.new(image_size.to_i, 0_u8)\ncheck_png(LibSPNG.decode_image(ctx, image, image_size, LibSPNG::Format::RGBA8, LibSPNG::DecodeFlags::None))\nLibSPNG.ctx_free(ctx)\nsize = image_size // 4\nwidth = size // ihdr.height\nheight = ihdr.height\nred = Array.new(size) do\n  0_u8\nend\ngreen = Array.new(size) do\n  0_u8\nend\nblue = Array.new(size) do\n  0_u8\nend\nalpha = Array.new(size) do\n  0_u8\nend\nsize.times do |index|\n  position = index * 4\n  red.unsafe_put(index, image[position + 0])\n  green.unsafe_put(index, image[position + 1])\n  blue.unsafe_put(index, image[position + 2])\n  alpha.unsafe_put(index, image[position + 3])\nend\nnew(red, green, blue, alpha, width.to_i, height.to_i)\n"}},{"html_id":"from_png(io:IO):self-class-method","name":"from_png","doc":"Construct an Image by reading bytes from `io`","summary":"
Construct an Image by reading bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_png(io.getb_to_end)"}},{"html_id":"from_ppm(image_data:Bytes):self-class-method","name":"from_ppm","doc":"Read `image_data` as PPM encoded bytes","summary":"
Read image_data as PPM encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_ppm","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"from_ppm(IO::Memory.new(image_data))"}},{"html_id":"from_ppm(io:IO):self-class-method","name":"from_ppm","doc":"Read bytes from `io` as PPM encoded","summary":"
Read bytes from io as PPM encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"_magic_number = io.gets(\"\\n\", chomp: true)\nwidth = (io.gets(\" \", chomp: true)).try(&.to_i)\nheight = (io.gets(\"\\n\", chomp: true)).try(&.to_i)\n_maximum_color_value = io.gets(\"\\n\", chomp: true)\nif width && height\n  red = Array.new(width * height) do\n    ChannelType::Red.default\n  end\n  green = Array.new(width * height) do\n    ChannelType::Green.default\n  end\n  blue = Array.new(width * height) do\n    ChannelType::Blue.default\n  end\n  alpha = Array.new(width * height) do\n    ChannelType::Alpha.default\n  end\n  (width * height).times do |index|\n    red_byte = io.read_byte\n    green_byte = io.read_byte\n    blue_byte = io.read_byte\n    if (red_byte && green_byte) && blue_byte\n      red.unsafe_put(index, red_byte)\n      green.unsafe_put(index, green_byte)\n      blue.unsafe_put(index, blue_byte)\n    else\n      raise(\"The image ends prematurely\")\n    end\n  end\n  new(red, green, blue, alpha, width, height)\nelse\n  raise(\"The image doesn't have width or height\")\nend\n"}},{"html_id":"from_webp(image_data:Bytes):self-class-method","name":"from_webp","doc":"Read `image_data` as WebP encoded bytes","summary":"
Read image_data as WebP encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_webp","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"check_webp(LibWebP.get_info(image_data, image_data.size, out width, out height))\nbuffer = LibWebP.decode_rgba(image_data, image_data.size, pointerof(width), pointerof(height))\nred = Array.new(width * height) do\n  0_u8\nend\ngreen = Array.new(width * height) do\n  0_u8\nend\nblue = Array.new(width * height) do\n  0_u8\nend\nalpha = Array.new(width * height) do\n  0_u8\nend\n(width * height).times do |index|\n  position = index * 4\n  red.unsafe_put(index, buffer[position])\n  green.unsafe_put(index, buffer[position + 1])\n  blue.unsafe_put(index, buffer[position + 2])\n  alpha.unsafe_put(index, buffer[position + 3])\nend\nLibWebP.free(buffer)\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_webp(io:IO):self-class-method","name":"from_webp","doc":"Read bytes from `io` as WebP encoded","summary":"
Read bytes from io as WebP encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_webp(io.getb_to_end)"}},{"html_id":"new(red:Array(UInt8),green:Array(UInt8),blue:Array(UInt8),alpha:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","doc":"Create a GrayscaleImage from a set of color channels (delegates to `RGBAImage#to_gray`)","summary":"
Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)
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Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)
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Run provided block with the ChannelType::Gray channels and channel types.
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Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).
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Construct a Mask identify all pixels larger than or equal to num.
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Crop the map, returning only the values in column at xstart
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Get element at index, or nil if out of bounds
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Get a single dimensional Map representing teh column at x
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Perform a brute force cross correlation calculation with provided template.
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Perform a Fast Fourier Transform cross correlation (convolution?) with provided template.
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Performe a Fast Fourier Transform, padding out this Map so dimensions are a power of 2.
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Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not
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Return the maximum value in this Map
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Return the minimum value in this Map
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Pad the borders of this Map corresponding to pad_type.
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Return the raw array underlying the map
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Size of the map - width * height
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Return the sum of all values in this Map
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Receive a copy of the underlying #raw array.
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Convert this Map to a ComplexMap
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Convert this Map to a GrayscaleImage.
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Mask is a wrapper around BitArray, where each flag represents a boolean bit of information about a pixel from an image.
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Construct a new Mask of width x height, preset to initial
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Construct a new Mask from an integer (useful for testing or small mask construction)
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Construct a new Mask from the dimensions of passed in image with an initial bit
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Construct a new Mask with a set width and bits from #bits
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Construct a new Mask of width x height using &block to determine if a bit should be true or not (passed in x and y coordinates)
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Construct a new Mask from an array of BitArray.
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at x and y
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Return a new BitArray corresponding to the partial row specified
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at index
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Set the bit for coordinate x and y
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Set the bits for partial row xs at column y
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Set the bits for row x and partial columns ys
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Closing operator
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Dilation operator
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Dilation operator
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Erosion operator
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Erosion operator
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Invert all bits in this instance of Mask.
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Opening operator
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Opening operator
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Returns the bounding box of the mask where all true bits are contained.
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Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).
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Set the bit for coordinate x and y
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How many bits are stored in this Mask
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","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"args_string":"(width : Int32, height : Int32) : self","args_html":"(width : Int32, height : Int32) : self","location":{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/bilinear_resize.cr#L21"},"def":{"name":"bilinear_resize!","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"x_ratio = width > 1 ? (@width - 1) / (width - 1) : 0\ny_ratio = height > 1 ? (@height - 1) / (height - 1) : 0\neach_channel do |channel, channel_type|\n  resized_channel = Array.new(width * height) do\n    0_u8\n  end\n  height.times do |h|\n    width.times do |w|\n      x = w * x_ratio\n      y = h * y_ratio\n      x_ceil = Math.min(@width - 1, x.ceil.to_i)\n      x_floor = x.floor.to_i\n      y_ceil = Math.min(@height - 1, y.ceil.to_i)\n      y_floor = y.floor.to_i\n      value = case\n      when (x_ceil == x_floor) && (y_ceil == y_floor)\n        x_index = x.to_i\n        y_index = y.to_i\n        channel.unsafe_fetch((@width * y_index) + x_index)\n      when x_ceil == x_floor\n        x_index = x.to_i\n        q_1 = channel.unsafe_fetch((@width * y_ceil) + x_index)\n        q_2 = channel.unsafe_fetch((@width * y_floor) + x_index)\n        ((q_2 * (y_ceil - y)) + (q_1 * (y - y_floor))).to_u8\n      when y_ceil == y_floor\n        y_index = y.to_i\n        q_1 = channel.unsafe_fetch((@width * y_index) + x_ceil)\n        q_2 = channel.unsafe_fetch((@width * y_index) + x_floor)\n        ((q_2 * (x_ceil - x)) + (q_1 * (x - x_floor))).to_u8\n      else\n        v_1 = channel.unsafe_fetch((@width * y_floor) + x_floor)\n        v_2 = channel.unsafe_fetch((@width * y_floor) + x_ceil)\n        v_3 = channel.unsafe_fetch((@width * y_ceil) + x_floor)\n        v_4 = channel.unsafe_fetch((@width * y_ceil) + x_ceil)\n        q_1 = (v_1 * (x_ceil - x)) + (v_2 * (x - x_floor))\n        q_2 = (v_3 * (x_ceil - x)) + (v_4 * (x - x_floor))\n        ((q_1 * (y_ceil - y)) + (q_2 * (y - y_floor))).to_u8\n      end\n      resized_channel.unsafe_put((width * h) + w, value)\n    end\n  end\n  self[channel_type] = resized_channel\nend\n@width = width\n@height = height\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","path":"CrImage/Operation/BoxBlur.html","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/box_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/box_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blurs the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.box_blur(1).save(\"blurred_1_sample.jpg\")\nimage.box_blur(5).save(\"blurred_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blurs the image
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Brightens an image (increases white value)
","instance_methods":[{"html_id":"brightness(value:Float64):self-instance-method","name":"brightness","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/brightness.cr#L12"},"def":{"name":"brightness","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.brightness!(value)"}},{"html_id":"brightness!(value:Float64):self-instance-method","name":"brightness!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/brightness.cr#L16"},"def":{"name":"brightness!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"each_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, (    (channel.unsafe_fetch(index)) * value))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","path":"CrImage/Operation/ChannelSwap.html","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap","abstract":false,"locations":[{"filename":"src/cr-image/operation/channel_swap.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Swaps channels of `ChannelType` supported by an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.channel_swap(:green, :red) # Crystal autocasting of symbols to Pluto::ChannelType enum is magic\n```\n\"Channel","summary":"
Swaps channels of ChannelType supported by an image
","instance_methods":[{"html_id":"channel_swap(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L12"},"def":{"name":"channel_swap","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"clone.channel_swap!(a, b)"}},{"html_id":"channel_swap!(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap!","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L16"},"def":{"name":"channel_swap!","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"ch_a, ch_b = self[a], self[b]\nself[a] = ch_b\nself[b] = ch_a\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Contrast","path":"CrImage/Operation/Contrast.html","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast","abstract":false,"locations":[{"filename":"src/cr-image/operation/contrast.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Increases contrast of an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.contrast(20)\n```\n\"Contrasted","summary":"
Increases contrast of an image
","instance_methods":[{"html_id":"contrast(value:Float64):self-instance-method","name":"contrast","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L12"},"def":{"name":"contrast","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.contrast!(value)"}},{"html_id":"contrast!(value:Float64):self-instance-method","name":"contrast!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L16"},"def":{"name":"contrast!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"factor = (259 * (value + 255)) / (255 * (259 - value))\neach_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, Math.max(0, (factor * ((channel.unsafe_fetch(index)).to_i - 128)) + 128))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Crop","path":"CrImage/Operation/Crop.html","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop","abstract":false,"locations":[{"filename":"src/cr-image/operation/crop.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Crops an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\n# These calls are equivalent\nimage.crop(40, 30, 80, 80)\nimage[40...120, 30...110]\n```\n\"Cropped","summary":"
Crops an image
","instance_methods":[{"html_id":"[](xrange:Range,yrange:Range):self-instance-method","name":"[]","abstract":false,"args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"args_string":"(xrange : Range, yrange : Range) : self","args_html":"(xrange : Range, yrange : Range) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L22"},"def":{"name":"[]","args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"return_type":"self","visibility":"Public","body":"xstart, xcount = resolve_to_start_and_count(xrange, width)\nystart, ycount = resolve_to_start_and_count(yrange, height)\ncrop(xstart, ystart, xcount, ycount)\n"}},{"html_id":"crop(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L18"},"def":{"name":"crop","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.crop!(x, y, new_width, new_height)"}},{"html_id":"crop(region:Region):self-instance-method","name":"crop","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L14"},"def":{"name":"crop","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop(*region.to_tuple)"}},{"html_id":"crop!(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":32,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L32"},"def":{"name":"crop!","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n  self[channel_type] = (UInt8Map.new(width, channel))[x, new_width, y, new_height].raw\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"Crystal Image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L17"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\nimage.draw_line(50, 50, 70, 90, CrImage::Color.of(\"#0f0\"))\n```\n\"Woman\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"
Draws shapes in the image
","instance_methods":[{"html_id":"draw_circle(x:Int,y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle centered at x, y with radius","summary":"
Draw a circle centered at x, y with radius
","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L59"},"def":{"name":"draw_circle","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(x, y, radius, color, fill: fill)"}},{"html_id":"draw_circle(region:Region,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L54"},"def":{"name":"draw_circle","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":3,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_circle!(center_x:Int,center_y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle!","abstract":false,"args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":68,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L68"},"def":{"name":"draw_circle!","args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"min_x = Math.max(0, center_x - radius)\nmax_x = Math.min(width - 1, center_x + radius)\nmax_y = Math.min(height - 1, center_y + radius)\neach_color_channel do |channel, channel_type|\n  0.upto(radius) do |y|\n    theta_0 = Math.asin((Math.max(0, (    y - 1))) / radius.to_f)\n    theta_1 = Math.asin(y / radius.to_f)\n    x_0 = (radius * (Math.cos(theta_0))).round\n    x_1 = (radius * (Math.cos(theta_1))).round\n    lower_x_outer = (Math.max(min_x, center_x - x_0)).to_i\n    lower_x_inner = (Math.max(min_x, center_x - x_1)).to_i\n    upper_x_outer = (Math.min(max_x, center_x + x_0)).to_i\n    upper_x_inner = (Math.min(max_x, center_x + x_1)).to_i\n    lower_y = center_y - y\n    upper_y = center_y + y\n    lower_y_outside_of_image = (center_y - y) < 0 || (center_y - y) > max_y\n    upper_y_outside_of_image = (center_y + y) < 0 || (center_y + y) > max_y\n    left_outer_x_beyond_right_of_image = (center_x - x_0) > max_x\n    right_outer_x_beyond_left_of_image = (center_x + x_0) < 0\n    left_inner_x_beyond_left_of_image = (center_x - x_1) < 0\n    right_inner_x_beyond_right_of_image = (center_x + x_1) > max_x\n    if fill\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n    else\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, lower_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, upper_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n    end\n  end\nend\nself\n"}},{"html_id":"draw_circle!(region:Region,color:Color,*,fill:Bool=false,radius:Int32|Nil=nil):self-instance-method","name":"draw_circle!","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
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Implementation of http://www.edepot.com/linec.html
","abstract":false,"args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","args_html":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":139,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L139"},"def":{"name":"draw_line!","args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"if (0 <= x1 && x1 < width) && (0 <= y1 && y1 < height)\nelse\n  raise(Exception.new(\"First point (#{x1},#{y1}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nif (0 <= x2 && x2 < width) && (0 <= y2 && y2 < height)\nelse\n  raise(Exception.new(\"Second point (#{x2},#{y2}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nrise_by_height = false\nshort = y2 - y1\nlong = x2 - x1\nif short.abs > long.abs\n  short, long = long, short\n  rise_by_height = true\nend\nend_val = long\ngradient = long == 0 ? short : short / long.abs.to_f\nif rise_by_height\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + jump.to_i, y1 + i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nelse\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + i, y1 + jump.to_i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : 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fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L18"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L30"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n  raise(\"Box dimensions extend #{((x + box_width) - width) + 1} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n  raise(\"Box dimensions extend #{((y + box_height) - height) + 1} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_color_channel do |channel, channel_type|\n  channel[(  (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  box_height.times do |i|\n    if i == 0\n      next\n    end\n    if fill\n      channel[(      ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n        color[channel_type]\n      end\n    else\n      channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n      channel.unsafe_put(((((y_i + i) * width) + x_i) + box_width) - 1, color[channel_type])\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : 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Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Applies a 3x3 Gaussian blur.
","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n  w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n  sizes << (if i < m\n    w_l\n  else\n    w_l + 2\n  end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"
Provides methods for histogram and histogram equalization.
","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":107,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L107"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":111,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L111"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":115,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L115"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_color_channel do |channel, channel_type|\n  if channel_type.alpha?\n    next\n  end\n  remap = (histogram(channel_type)).equalize\n  size.times do |i|\n    channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n  end\nend\nself\n"}}],"types":[{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"
A histogram of an Image for a specific ChannelType
","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L24"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"
Get the cumulative distribution for the image's histogram
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L56"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n  original = total\n  total = total + probability\n  {pixel, original}\nend.to_h)\n"}},{"html_id":"channel_type:CrImage::ChannelType-instance-method","name":"channel_type","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"channel_type","visibility":"Public","body":"@channel_type"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"
Get the raw counts for a given pixel value (0-255) in the image
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L30"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"
Remap the cumalitive distribution of pixels to get a new, more spread out pixel value
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L66"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n  {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"image:CrImage::Image-instance-method","name":"image","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"image","visibility":"Public","body":"@image"}},{"html_id":"mean:Float64-instance-method","name":"mean","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L74"},"def":{"name":"mean","return_type":"Float64","visibility":"Public","body":"@mean || (@mean = counts.sum do |pixel, count|\n  pixel.to_i64 * count\nend.to_f64 / @image.size)"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"
Get pixel counts normalized - all values between 0.0 and 1.0
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":47,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L47"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n  {pixel, count.to_f / @image.size}\nend.to_h"}},{"html_id":"std_dev:Float64-instance-method","name":"std_dev","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":80,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L80"},"def":{"name":"std_dev","return_type":"Float64","visibility":"Public","body":"@std_dev || (@std_dev = Math.sqrt(counts.sum do |value, count|\n  count * ((value.to_i64 - mean) ** 2)\nend.to_f64 / @image.size))"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the horizontal axis
","instance_methods":[{"html_id":"horizontal_blur(k:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(k)"}},{"html_id":"horizontal_blur!(k:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((k + k) + 1)\neach_color_channel do |channel|\n  @height.times do |y|\n    center_index : Int32 = y * @width\n    left__bound : Int32 = center_index\n    right_bound : Int32 = center_index + k\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last__value : Int32 = (channel.unsafe_fetch((center_index + @width) - 1)).to_i\n    current_sum : Int32 = (k + 1) * first_value\n    (0..(k - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + i))\n    end\n    (0..k).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      center_index = center_index + 1\n    end\n    ((k + 1)..((@width - k) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n    ((@width - k)..(@width - 1)).each do\n      current_sum = current_sum + (last__value - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |pixel, channel_type, x, y|\n  Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"
Apply a mask to an image
","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"
Black out all pixels but those found in the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"
Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"
TODO  add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? pixel : 0_u8\n  end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? (block.call(pixel, channel_type, i % width, i // width)) || pixel : pixel\n  end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"
Change the color of all pixels that match the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, channel_type|\n  color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/Pad","path":"CrImage/Operation/Pad.html","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad","abstract":false,"locations":[{"filename":"src/cr-image/operation/pad.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Pads an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.pad(left: 50, right: 50)\nimage.pad(left: 50, right: 50, pad_type: CrImage::EdgePolicy::Repeat)\n```\n\"Picture\n\"Picture","summary":"
Pads an image
","instance_methods":[{"html_id":"pad(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L14"},"def":{"name":"pad","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.pad!(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type)"}},{"html_id":"pad!(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad!","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L18"},"def":{"name":"pad!","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"orig_width = width\neach_channel do |channel, channel_type|\n  padded = (UInt8Map.new(orig_width, channel)).pad(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type, pad_black_value: channel_type.default)\n  self[channel_type] = padded.raw\n  @width = padded.width\n  @height = padded.height\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Rotate","path":"CrImage/Operation/Rotate.html","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate","abstract":false,"locations":[{"filename":"src/cr-image/operation/rotate.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Rotates an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.rotate(45)\nimage.rotate(45, pad: true)\n```\n\"Rotated\n\"Rotated","summary":"
Rotates an image
","instance_methods":[{"html_id":"rotate(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate","doc":"Rotates an image by `degrees`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L20"},"def":{"name":"rotate","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.rotate!(degrees, center_x: center_x, center_y: center_y, radius: radius, pad: pad, pad_type: pad_type)"}},{"html_id":"rotate!(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate!","doc":"Rotates an image by `degrees`. Modifies `self`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees.
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L38"},"def":{"name":"rotate!","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"if pad_type.none?\n  raise(Exception.new(\"Edge policy None doesn't apply to rotation\"))\nend\nif pad && radius >= 0\n  raise(Exception.new(\"Can't pad image and limit rotation by radius\"))\nend\nradians = ((-Math::PI) * degrees) / 180\nsin = Math.sin(radians)\ncos = Math.cos(radians)\nradius_sq = radius * radius\nnew_width, new_size, out_center_x, out_center_y = output_dimensions(pad, degrees, center_x, center_y)\neach_channel do |channel, channel_type|\n  new_x = -1\n  new_y = 0\n  self[channel_type] = Array.new(new_size) do |i|\n    new_x = new_x + 1\n    if new_x == new_width\n      new_x = 0\n      new_y = new_y + 1\n    end\n    if radius >= 0 && (((new_x - center_x) ** 2) + ((new_y - center_y) ** 2)) > radius_sq\n      next channel.unsafe_fetch(i)\n    end\n    orig_x = (((cos * (new_x - out_center_x)) - (sin * (new_y - out_center_y))) + center_x).round.to_i\n    orig_y = (((sin * (new_x - out_center_x)) + (cos * (new_y - out_center_y))) + center_y).round.to_i\n    if pad_type.black?\n      if ((orig_x < 0 || orig_x >= width) || orig_y < 0) || orig_y >= height\n        next channel_type.default\n      end\n    else\n      orig_x = orig_x.clamp(0, width - 1)\n      orig_y = orig_y.clamp(0, height - 1)\n    end\n    channel.unsafe_fetch((orig_y * width) + orig_x)\n  end\nend\n@width = new_width\n@height = new_size // new_width\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the vertical axis
","instance_methods":[{"html_id":"vertical_blur(value:Int32):self-instance-method","name":"vertical_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L14"},"def":{"name":"vertical_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.vertical_blur!(value)"}},{"html_id":"vertical_blur!(value:Int32):self-instance-method","name":"vertical_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L18"},"def":{"name":"vertical_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_color_channel do |channel|\n  @width.times do |x|\n    center_index : Int32 = x\n    left_bound : Int32 = center_index\n    right_bound : Int32 = center_index + (value * @width)\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last_value : Int32 = (channel.unsafe_fetch(center_index + (@width * (@height - 1)))).to_i\n    current_sum : Int32 = (value + 1) * first_value\n    (0..(value - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + (i * @width)))\n    end\n    (0..value).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((value + 1)..((@height - value) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((@height - value)..(@height - 1)).each do\n      current_sum = current_sum + (last_value - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      center_index = center_index + @width\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]}]},{"html_id":"Crystal Image/CrImage/Region","path":"CrImage/Region.html","kind":"struct","full_name":"CrImage::Region","name":"Region","abstract":false,"superclass":{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},"ancestors":[{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Represents a rectangular area on an `Image` from its upper left corner `x` and `y` coordinates, and a `width` and `height`.\n\nSee `Operation::Crop#crop` and `Operation::Draw#draw_square` for examples using it.","summary":"
Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.
","constructors":[{"html_id":"center(x:UInt16,y:UInt16,width:UInt16,height:UInt16):Region-class-method","name":"center","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","location":{"filename":"src/cr-image/region.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L11"},"def":{"name":"center","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"return_type":"Region","visibility":"Public","body":"new(x - (width // 2), y - (height // 2), width, height)"}},{"html_id":"new(x:UInt16,y:UInt16,width:UInt16,height:UInt16)-class-method","name":"new","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","location":{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L5"},"def":{"name":"new","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"visibility":"Public","body":"_ = allocate\n_.initialize(x, y, width, height)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"center:Tuple(Int32,Int32)-instance-method","name":"center","doc":"Return the `{x, y}` tuple of the center coordinates of this `Region`","summary":"
Return the {x, y} tuple of the center coordinates of this Region
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Crop a provided Image with this region, using Operation::Crop#crop
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Read image_data as JPEG encoded bytes
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Construct an Image from reading in bytes from io
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Read image_data and PNG encoded bytes
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Construct an Image by reading bytes from io
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Read image_data as PPM encoded bytes
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Read bytes from io as PPM encoded
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Read image_data as WebP encoded bytes
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Read bytes from io as WebP encoded
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Image/Pluto/Operation/VerticalBlur","kind":"module","full_name":"Pluto::Operation::VerticalBlur","name":"VerticalBlur"}],"namespace":{"html_id":"Crystal Image/Pluto","kind":"module","full_name":"Pluto","name":"Pluto"},"instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","doc":"Con","summary":"
Con
","abstract":false,"location":{"filename":"src/pluto.cr","line_number":23,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L23"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"CrImage::RGBAImage.new(red.clone, green.clone, blue.clone, alpha.clone, width, height)"}}]}]},{"html_id":"Crystal Image/StumpyCore","path":"StumpyCore.html","kind":"module","full_name":"StumpyCore","name":"StumpyCore","abstract":false,"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":3,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/canvas.cr#L3"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba.cr#L4"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/mixing.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/mixing.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/utils.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/utils.cr#L1"},{"filename":"src/stumpy.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"A module owned by [StumpyCr](https://github.com/stumpycr/stumpy_core)","summary":"
A module owned by StumpyCr
","types":[{"html_id":"Crystal Image/StumpyCore/Canvas","path":"StumpyCore/Canvas.html","kind":"class","full_name":"StumpyCore::Canvas","name":"Canvas","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":31,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/canvas.cr#L31"},{"filename":"src/stumpy.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L6"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/StumpyCore","kind":"module","full_name":"StumpyCore","name":"StumpyCore"},"doc":"A canvas is 2D array of `RGBA` pixels\n\nTo create a canvas of size `400` x `200`\n\n```\ncanvas = StumpyCore::Canvas.new(400, 200)\n```\n\nThe default background color is transparent,\nbut it can be passed in as a parameter or as a block\nthat returns the color value for each `{x, y}` pair.\n\n```\ncanvas2 = StumpyCore::Canvas.new(400, 200, RGBA::WHITE)\n```\n\n```\ncanvas3 = StumpyCore::Canvas.new(256, 256) do |x, y|\n  RGBA.from_rgb_n(x, y, 255, 8)\nend\n```\n![image](https://github.com/stumpycr/stumpy_core/blob/feature/images/rainbow.png?raw=true)\n\nBecause of the way pixels are stored in a `Slice`,\n`Canvas`es are limited to `Int32::MAX = 2147483647` pixels in total,\ne.g. a maximal size of 46340x46340 for a square image.","summary":"
A canvas is 2D array of RGBA pixels
","instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","abstract":false,"location":{"filename":"src/stumpy.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L7"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"size = width * height\nred = Array(UInt8).new(size)\ngreen = Array(UInt8).new(size)\nblue = Array(UInt8).new(size)\nalpha = Array(UInt8).new(size)\neach_row do |row|\n  row.each do |rgba|\n    red << (rgba.r >> 8).to_u8\n    green << (rgba.g >> 8).to_u8\n    blue << (rgba.b >> 8).to_u8\n    alpha << (rgba.a >> 8).to_u8\n  end\nend\nCrImage::RGBAImage.new(red, green, blue, alpha, width, height)\n"}}]}]},{"html_id":"Crystal Image/Tutorial","path":"Tutorial.html","kind":"module","full_name":"Tutorial","name":"Tutorial","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/chromakey_tutorial.cr#L35"},{"filename":"src/tutorials/tutorial.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/tutorial.cr#L7"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This fictional module exists to provide tutorials for using CrImage in the documentation\n\nSee:\n* `EdgeDetection`\n* `ChromaKey`\n* `FindDifferences`","summary":"
This fictional module exists to provide tutorials for using CrImage in the documentation
","types":[{"html_id":"Crystal Image/Tutorial/ChromaKey","path":"Tutorial/ChromaKey.html","kind":"module","full_name":"Tutorial::ChromaKey","name":"ChromaKey","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/chromakey_tutorial.cr#L35"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can swap out the background by creating a mask representing the pixels that are close in color, and replacing them using an `MaskApply#apply_color` method.\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"sample.jpg\")\n\n# Grab a color from the background, for comparison\nbackground = image[10, 10]\n\n# Construct a mask of all pixels within a color distance of our background\nbackground_mask = image.mask_from do |color|\n  # 25 chosen through trial-and-error\n  color.dist(background) < 25\nend\n  .closing! # Remove small `true` regions\n  .opening! # Remove small `false` regions\n\n# Now make the background blue\nimage\n  .apply_color(background_mask, CrImage::Color.of(\"#0000cc\"))\n  .save(\"chromakey.jpg\")\n```\n\nResults in image:\n\n\"Background\n\nThis script ran on my machine in `4ms` in `--release` mode.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/EdgeDetection","path":"Tutorial/EdgeDetection.html","kind":"module","full_name":"Tutorial::EdgeDetection","name":"EdgeDetection","abstract":false,"locations":[{"filename":"src/tutorials/edge_detection_tutorial.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/edge_detection_tutorial.cr#L38"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can run the [Sobel Operator](https://en.wikipedia.org/wiki/Sobel_operator) to detect edges in it:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nvertical_sobel = CrImage::IntMap.new([\n  [-1, -2, -1],\n  [0, 0, 0],\n  [1, 2, 1],\n])\n\nhorizontal_sobel = CrImage::IntMap.new([\n  [-1, 0, 1],\n  [-2, 0, 2],\n  [-1, 0, 1],\n])\n\nimage = CrImage::GrayscaleImage.open(\"sample.jpg\")\n\ndx = image.cross_correlate(horizontal_sobel)\ndy = image.cross_correlate(vertical_sobel)\n\n(dx ** 2 + dy ** 2).to_gray(scale: true).save(\"edge_detection.jpg\")\n```\n\nResults in image:\n\n\"Black\n\nThis script ran on my machine in `11ms` in `--release` mode.\n\n**Note**: This tutorial is using `cross_correlate`. For large images (or medium-to-large operators), the `cross_correlate_fft` may perform better.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/FindDifferences","path":"Tutorial/FindDifferences.html","kind":"module","full_name":"Tutorial::FindDifferences","name":"FindDifferences","abstract":false,"locations":[{"filename":"src/tutorials/find_differences.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/find_differences.cr#L55"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `differences.jpg` image:\n\n\"Two\n\nWe can programatically detect _most_ of the differences between these two images:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"differences.jpg\")\nret = image.clone\n\n# Perform a blur to remove random noise\nimg1 = image.gaussian_blur(1)[2...340, ..]\nimg2 = image.gaussian_blur(1)[361...699, ..]\n\n# Convert each color channel into a IntMap\nred_img1 = CrImage::UInt8Map.new(img1.width, img1.red).to_i\ngre_img1 = CrImage::UInt8Map.new(img1.width, img1.green).to_i\nblu_img1 = CrImage::UInt8Map.new(img1.width, img1.blue).to_i\nred_img2 = CrImage::UInt8Map.new(img2.width, img2.red).to_i\ngre_img2 = CrImage::UInt8Map.new(img2.width, img2.green).to_i\nblu_img2 = CrImage::UInt8Map.new(img2.width, img2.blue).to_i\n\n# Calculate a pixel by pixel difference calculation, convert it to a `Mask`\nred_mask = (red_img1 - red_img2).abs.>(50)\ngre_mask = (gre_img1 - gre_img2).abs.>(50)\nblu_mask = (blu_img1 - blu_img2).abs.>(50)\n\n# Combine the different color channel masks\ncombo_mask = (red_mask | blu_mask | gre_mask).dilate!\n\n# Expensive way to make a thick box.\n3.times do\n  combo_mask.dilate!.segments.each do |v|\n    # Draw a box in the first image\n    ret.draw_square!(v.region.x + 2, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n    # ... and the second image\n    ret.draw_square!(v.region.x + 361, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n  end\nend\n\nret.save(\"differences_end.jpg\")\n```\n\nResults in image:\n\n\"Two\n\nThis script ran on my machine in `66ms` in `--release` mode.\n\n**NOTE**: There's a difference in the seeds on one of the watermelons that don't survive the blurring process, and so aren't picked\nup by the differences algorithm above.","summary":"
Given differences.jpg image:
"}]}]}}
\ No newline at end of file
diff --git a/docs/search-index.js b/docs/search-index.js
index 890b535..ac1bf20 100644
--- a/docs/search-index.js
+++ b/docs/search-index.js
@@ -1 +1 @@
-crystal_doc_search_index_callback({"repository_name":"Crystal Image","body":"
Crystal Image (Processing)
\n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here originated as a fork from [Pluto](https://github.com/phenopolis/pluto) and further takes inspiration from [Stumpy](https://github.com/stumpycr/stumpy_core),\nand support converting to and from both of those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n   ```yaml\n   dependencies:\n     cr-image:\n       github: vici37/cr-image\n   ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n  .to_gray\n  .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n  moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See the tutorials](http://troy.sornson.io/cr-image/Tutorial.html) for more examples.\n\n### [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core) Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n**NOTE:** Currently Pluto and CrImage share the same bindings for `libturbojpeg`, `libspng`, and `libwebp`. If you\nuse Pluto, you _cannot_ use those formats from CrImage.\n\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n**NOTE:** Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image.cr#L20"},{"filename":"src/cr-image/edge_policy.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/edge_policy.cr#L1"},{"filename":"src/cr-image/map.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L1"},{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/region.cr#L1"},{"filename":"src/cr-image/window_view.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/pluto.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/pluto.cr#L35"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This module by itself isn't very interesting. Try taking a look through the [tutorials](./Tutorial.html) for better examples.","summary":"
This module by itself isn't very interesting.
","types":[{"html_id":"Crystal Image/CrImage/BlackView","path":"CrImage/BlackView.html","kind":"class","full_name":"CrImage::BlackView(T)","name":"BlackView","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},"ancestors":[{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/window_view.cr","line_number":76,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L76"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An implementation of `Window`, where the value of a point in the window that is off the edge of the underlying `Map` resolves to zero (or black)","summary":"
An implementation of Window, where the value of a point in the window that is off the edge of the underlying Map resolves to zero (or black)
","constructors":[{"html_id":"new(width,height,map,map_x,map_y)-class-method","name":"new","abstract":false,"args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"args_string":"(width, height, map, map_x, map_y)","args_html":"(width, height, map, map_x, map_y)","location":{"filename":"src/cr-image/window_view.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L17"},"def":{"name":"new","args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"visibility":"Public","body":"_ = BlackView(T).allocate\n_.initialize(width, height, map, map_x, map_y)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"[](x:Int32,y:Int32):T-instance-method","name":"[]","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32) : T","args_html":"(x : Int32, y : Int32) : T","location":{"filename":"src/cr-image/window_view.cr","line_number":77,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/window_view.cr#L77"},"def":{"name":"[]","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"return_type":"T","visibility":"Public","body":"adjusted_x = (x - @half_width) + @map_x\nadjusted_y = (y - @half_height) + @map_y\nif (adjusted_x < 0 || adjusted_x >= @map.width) || (adjusted_y < 0 || adjusted_y >= @map.height)\n  return T.zero\nend\n@map[(adjusted_y * @map.width) + adjusted_x]\n"}}]},{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_color_channel` and `GrayscaleImage#each_color_channel`","summary":"
Enum representing different image channels supported by CrImage
","instance_methods":[{"html_id":"alpha?-instance-method","name":"alpha?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":9,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L9"},"def":{"name":"alpha?","visibility":"Public","body":"self == Alpha"}},{"html_id":"blue?-instance-method","name":"blue?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L7"},"def":{"name":"blue?","visibility":"Public","body":"self == Blue"}},{"html_id":"default:UInt8-instance-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L11"},"def":{"name":"default","return_type":"UInt8","visibility":"Public","body":"alpha? ? 255_u8 : 0_u8"}},{"html_id":"gray?-instance-method","name":"gray?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L8"},"def":{"name":"gray?","visibility":"Public","body":"self == Gray"}},{"html_id":"green?-instance-method","name":"green?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L6"},"def":{"name":"green?","visibility":"Public","body":"self == Green"}},{"html_id":"red?-instance-method","name":"red?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/channel_type.cr#L5"},"def":{"name":"red?","visibility":"Public","body":"self == Red"}}]},{"html_id":"Crystal Image/CrImage/Color","path":"CrImage/Color.html","kind":"class","full_name":"CrImage::Color","name":"Color","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/color.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Utility class for parsing and representing colors that can be used for certain\nmethods in CrImage.\n\nSee `Operation::MaskApply#apply_color`, `Operation::Draw#draw_square`, or `Operation::Draw#draw_circle`","summary":"
Utility class for parsing and representing colors that can be used for certain methods in CrImage.
","constructors":[{"html_id":"default:Color-class-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L11"},"def":{"name":"default","return_type":"Color","visibility":"Public","body":"new(ChannelType::Red.default, ChannelType::Green.default, ChannelType::Blue.default, ChannelType::Alpha.default)"}},{"html_id":"new(red:UInt8,green:UInt8,blue:UInt8,alpha:UInt8=ChannelType::Alpha.default)-class-method","name":"new","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"args_string":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","args_html":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","location":{"filename":"src/cr-image/color.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L8"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"visibility":"Public","body":"_ = allocate\n_.initialize(red, green, blue, alpha)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"of(color:String):Color-class-method","name":"of","doc":"Parse color from a hex string:\n\n```\nColor.of(\"#1\")        # same as \"#11\" => Color.new(17, 17, 17, 255)\nColor.of(\"#01\")       # => Color.new(1, 1, 1, 255)\nColor.of(\"#123\")      # same as \"#112233\" => Color.new(17, 34, 51, 255)\nColor.of(\"#1234\")     # same as \"#11223344\" => Color.new(34, 51, 68, 17)\nColor.of(\"#010203\")   # => Color.new(1, 2, 3, 255)\nColor.of(\"#01020304\") # => Color.new(2, 3, 4, 1)\n```","summary":"
Parse color from a hex string:
","abstract":false,"args":[{"name":"color","external_name":"color","restriction":"String"}],"args_string":"(color : String) : Color","args_html":"(color : String) : Color","location":{"filename":"src/cr-image/color.cr","line_number":49,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L49"},"def":{"name":"of","args":[{"name":"color","external_name":"color","restriction":"String"}],"return_type":"Color","visibility":"Public","body":"if ((!(color.starts_with?(\"#\"))) || (!({2, 3, 4, 5, 7, 9}.includes?(color.size)))) || (color.match(/^#[^0-9a-f]/i))\n  raise(\"Invalid hex color '#{color}': must start with '#' followed by 1, 2, 3, 4, 6, or 9 alphanumeric characters (0-9 or a-f)\")\nend\ncase color.size\nwhen 2\n  gray = (color[1].to_i(16)).to_u8\n  gray = (gray << 4) + gray\n  self.new(gray, gray, gray)\nwhen 3\n  gray = (color[1, 2].to_i(16)).to_u8\n  self.new(gray, gray, gray)\nwhen 4\n  red = (color[1].to_i(16)).to_u8\n  green = (color[2].to_i(16)).to_u8\n  blue = (color[3].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue)\nwhen 5\n  alpha = (color[1].to_i(16)).to_u8\n  red = (color[2].to_i(16)).to_u8\n  green = (color[3].to_i(16)).to_u8\n  blue = (color[4].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue, (alpha << 4) + alpha)\nwhen 7\n  red = (color[1, 2].to_i(16)).to_u8\n  green = (color[3, 2].to_i(16)).to_u8\n  blue = (color[5, 2].to_i(16)).to_u8\n  self.new(red, green, blue)\nelse\n  alpha = (color[1, 2].to_i(16)).to_u8\n  red = (color[3, 2].to_i(16)).to_u8\n  green = (color[5, 2].to_i(16)).to_u8\n  blue = (color[7, 2].to_i(16)).to_u8\n  self.new(red, green, blue, alpha)\nend\n"}},{"html_id":"random:Color-class-method","name":"random","doc":"Generate a random color with full (255) opacity","summary":"
Generate a random color with full (255) opacity
","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L16"},"def":{"name":"random","return_type":"Color","visibility":"Public","body":"r = Random.new\nnew(r.rand(UInt8), r.rand(UInt8), r.rand(UInt8), ChannelType::Alpha.default)\n"}}],"instance_methods":[{"html_id":"==(other:Color):Bool-instance-method","name":"==","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"}],"args_string":"(other : Color) : Bool","args_html":"(other : Color) : Bool","location":{"filename":"src/cr-image/color.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L93"},"def":{"name":"==","args":[{"name":"other","external_name":"other","restriction":"Color"}],"return_type":"Bool","visibility":"Public","body":"(((red == other.red) && (green == other.green)) && (blue == other.blue)) && (alpha == other.alpha)"}},{"html_id":"[](channel_type:ChannelType):UInt8-instance-method","name":"[]","doc":"Receive the UInt8 portion of this color corresponding to `channel_type`","summary":"
Receive the UInt8 portion of this color corresponding to channel_type
","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : UInt8","args_html":"(channel_type : ChannelType) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L29"},"def":{"name":"[]","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"UInt8","visibility":"Public","body":"case channel_type\nin ChannelType::Red\n  red\nin ChannelType::Green\n  green\nin ChannelType::Blue\n  blue\nin ChannelType::Alpha\n  alpha\nin ChannelType::Gray\n  gray\nend"}},{"html_id":"alpha:UInt8-instance-method","name":"alpha","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"alpha","visibility":"Public","body":"@alpha"}},{"html_id":"blue:UInt8-instance-method","name":"blue","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"blue","visibility":"Public","body":"@blue"}},{"html_id":"dist(other:Color,*,manhattan:Bool=false):Float64-instance-method","name":"dist","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"args_string":"(other : Color, *, manhattan : Bool = false) : Float64","args_html":"(other : Color, *, manhattan : Bool = false) : Float64","location":{"filename":"src/cr-image/color.cr","line_number":100,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L100"},"def":{"name":"dist","args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"splat_index":1,"return_type":"Float64","visibility":"Public","body":"if manhattan\n  ((red.to_f - other.red).abs + (blue.to_i - other.blue).abs) + (green.to_i - other.green).abs\nelse\n  Math.sqrt((((red.to_i - other.red) ** 2) + ((green.to_i - other.green) ** 2)) + ((blue.to_i - other.blue) ** 2))\nend"}},{"html_id":"gray(red_multiplier:Float=0.299,green_multiplier:Float=0.587,blue_multiplier:Float=0.114):UInt8-instance-method","name":"gray","doc":"Convert this Color to a single UInt8 gray value","summary":"
Convert this Color to a single UInt8 gray value
","abstract":false,"args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"args_string":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","args_html":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L22"},"def":{"name":"gray","args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"return_type":"UInt8","visibility":"Public","body":"Math.min(255_u8, (((red * red_multiplier) + (blue * blue_multiplier)) + (green * green_multiplier)).to_u8)"}},{"html_id":"green:UInt8-instance-method","name":"green","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"green","visibility":"Public","body":"@green"}},{"html_id":"red:UInt8-instance-method","name":"red","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/color.cr#L6"},"def":{"name":"red","visibility":"Public","body":"@red"}}]},{"html_id":"Crystal Image/CrImage/ComplexMap","path":"CrImage/ComplexMap.html","kind":"class","full_name":"CrImage::ComplexMap","name":"ComplexMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":606,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L606"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"instance_methods":[{"html_id":"ifft:FloatMap-instance-method","name":"ifft","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":609,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L609"},"def":{"name":"ifft","return_type":"FloatMap","visibility":"Public","body":"FloatMap.new(width, (FftUtil.ifft2d(width, raw)).map(&.real))"}},{"html_id":"to_c:ComplexMap-instance-method","name":"to_c","doc":"Convert this `Map` to a `ComplexMap`","summary":"
Convert this Map to a ComplexMap
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A general enum for determining behavior around edges of Image or Maps.
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Exception class for any errors thrown by CrImage
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Utility class for Fast Fourier Transforms
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Perform Fast Fourier Transform on inp.
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Perform Fast Fourier Transform on inp.
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Calculates Fast Fourier Transform of ret.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, using and rewriting ret for the output, as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L28"},"def":{"name":"fft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.fft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.fft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}},{"html_id":"ifft1d(inp:Array(Complex),buffer:Array(Complex)=inp.dup):Array(Complex)-class-method","name":"ifft1d","doc":"Perform Inverse Fast Fourier Transform on `inp`.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`.","summary":"
Perform Inverse Fast Fourier Transform on inp.
","abstract":false,"args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","args_html":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":165,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L165"},"def":{"name":"ifft1d","args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"if inp.size == inp.size.next_power_of_two\nelse\n  raise(Exception.new(\"Input is of size #{inp.size}, which is not a power of 2 (next power of 2: #{inp.size.next_power_of_two})\"))\nend\nFftUtil.ifft1d_unsafe(inp.dup, buffer)\n"}},{"html_id":"ifft1d_unsafe(ret:Array(Complex)|Slice(Complex),buffer:Array(Complex)=ret.dup):Array(Complex)|Slice(Complex)-class-method","name":"ifft1d_unsafe","doc":"Perform Inverse Fast Fourier Transform on `ret`. Will use and overwrite the original values in `ret` to do so.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`. This method makes no bound checks or error checks.","summary":"
Perform Inverse Fast Fourier Transform on ret.
","abstract":false,"args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","args_html":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":173,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L173"},"def":{"name":"ifft1d_unsafe","args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex) | Slice(Complex)","visibility":"Public","body":"shape = 1\nhalf = ret.size\nreal_half = (ret.size >> 1)\nwhile half > 1\n  double_half = half\n  half = half >> 1\n  neg_i_pi_div_shape = Math::PI.i / shape\n  buffer.to_unsafe.copy_from(ret.to_unsafe, ret.size)\n  half_offset = half\n  shape.times do |i|\n    term = Math.exp(neg_i_pi_div_shape * i)\n    half.times do |j|\n      offset = j + half_offset\n      buffer.unsafe_put(offset, (buffer.unsafe_fetch(offset)) * term)\n    end\n    half_offset = half_offset + double_half\n  end\n  offset = -1\n  counter = -1\n  real_half.times do |i|\n    offset = offset + 1\n    counter = counter + 1\n    if counter == half\n      counter = 0\n      offset = offset + half\n    end\n    ret.unsafe_put(i, (buffer.unsafe_fetch(offset)) + (buffer.unsafe_fetch(offset + half)))\n    ret.unsafe_put(i + real_half, (buffer.unsafe_fetch(offset)) - (buffer.unsafe_fetch(offset + half)))\n  end\n  shape = shape << 1\nend\nret.map!(&./(ret.size))\n"}},{"html_id":"ifft2d(width:Int32,inp:Array(Complex),buffer:Array(Complex)|Nil=nil):Array(Complex)-class-method","name":"ifft2d","doc":"Perform Inverse Fast Fourier Transform, treating as `inp` as a 2 dimensional array with `width`.\n\nCan optionally pass in `buffer` which must be an array at least the larger of `width` or `inp.size // width`.","summary":"
Perform Inverse Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"args_string":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","args_html":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":124,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L124"},"def":{"name":"ifft2d","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"return_type":"Array(Complex)","visibility":"Public","body":"if width == width.next_power_of_two\nelse\n  raise(Exception.new(\"Width #{width} must be power of 2 (next power of two: #{width.next_power_of_two})\"))\nend\nheight = inp.size // width\nif height == height.next_power_of_two\nelse\n  raise(Exception.new(\"Input height #{height} must be power of 2 (next power of two: #{(height).next_power_of_two})\"))\nend\nif buf = buffer\nelse\n  buf = Array(Complex).new(Math.max(width, inp.size // width)) do\n    Complex.zero\n  end\nend\nFftUtil.ifft2d_unsafe(width, inp.dup, buf)\n"}},{"html_id":"ifft2d_unsafe(width:Int32,ret:Array(Complex),buffer:Array(Complex)):Array(Complex)-class-method","name":"ifft2d_unsafe","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":135,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/fft_util.cr#L135"},"def":{"name":"ifft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.ifft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.ifft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}}]},{"html_id":"Crystal Image/CrImage/FloatMap","path":"CrImage/FloatMap.html","kind":"class","full_name":"CrImage::FloatMap","name":"FloatMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":508,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L508"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Implementation of `MapImpl` for `Float64` types.","summary":"
Implementation of MapImpl for Float64 types.
","instance_methods":[{"html_id":"to_f:FloatMap-instance-method","name":"to_f","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":519,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L519"},"def":{"name":"to_f","return_type":"FloatMap","visibility":"Public","body":"self"}},{"html_id":"to_f64:self-instance-method","name":"to_f64","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":511,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L511"},"def":{"name":"to_f64","return_type":"self","visibility":"Public","body":"self"}},{"html_id":"to_i:IntMap-instance-method","name":"to_i","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":515,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L515"},"def":{"name":"to_i","return_type":"IntMap","visibility":"Public","body":"IntMap.new(width, @raw.map(&.to_i))"}}],"macros":[{"html_id":"method_missing(call)-macro","name":"method_missing","abstract":false,"args":[{"name":"call","external_name":"call","restriction":""}],"args_string":"(call)","args_html":"(call)","location":{"filename":"src/cr-image/map.cr","line_number":509,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/map.cr#L509"},"def":{"name":"method_missing","args":[{"name":"call","external_name":"call","restriction":""}],"visibility":"Public","body":"          def \n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n : self\n            self.class.new(width, @raw.map(&.\n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n))\n          \nend\n        \n"}}]},{"html_id":"Crystal Image/CrImage/Format","path":"CrImage/Format.html","kind":"module","full_name":"CrImage::Format","name":"Format","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"constants":[{"id":"SUPPORTED_FORMATS","name":"SUPPORTED_FORMATS","value":"[{extension: \".ppm\", method: \"ppm\"}, {extension: \".jpeg\", method: \"jpeg\"}, {extension: \".jpg\", method: \"jpeg\"}, {extension: \".png\", method: \"png\"}, {extension: \".webp\", method: \"webp\"}] of Nil"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Provides a convenience method for saving image files to the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage.save(\"image.jpg\")\n```\nSee `Open` for a convenience method to read images from the filesystem","summary":"
Provides a convenience method for saving image files to the filesystem.
","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"
Provides methods to read from and write to jpeg.
","instance_methods":[{"html_id":"to_jpeg(io:IO,quality:Int32=100):Nil-instance-method","name":"to_jpeg","doc":"Output the image as JPEG to `io`","summary":"
Output the image as JPEG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, quality : Int32 = 100) : Nil","args_html":"(io : IO, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/jpeg.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/jpeg.cr#L74"},"def":{"name":"to_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"return_type":"Nil","visibility":"Public","body":"handle = LibJPEGTurbo.init_compress\nimage_data = IO::Memory.new(size * 3)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\nend\nbuffer = Pointer(UInt8).null\ncheck_jpeg(handle, LibJPEGTurbo.compress2(handle, image_data.buffer, @width, 0, @height, LibJPEGTurbo::PixelFormat::RGB, pointerof(buffer), out size, LibJPEGTurbo::Subsampling::S444, quality, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibJPEGTurbo.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/open.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"
Provides a convenience method for opening up image files from the filesystem.
","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"
Reads this image from file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n    case filename\n    {% for format in SUPPORTED_FORMATS %}\n      when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n    {% end %}\n      else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n  __arg0[:extension].id\nend.join(\", \")).id }}\"\n    end\n    {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"
Provides methods to read from and write to PNG.
","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"
Output the image as PNG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"
Provides methods to read from and write to PPM.
","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"
Output this image to io using PPM image encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n  io.write_byte(red.unsafe_fetch(index))\n  io.write_byte(green.unsafe_fetch(index))\n  io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"
Write this image to file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n  {% if true %}\n        case filename\n        {% for format in SUPPORTED_FORMATS %}\n          when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n        {% end %}\n          else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n    __arg0[:extension].id\n  end.join(\", \")).id }}\"\n        end\n        {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"
Provides methods to read from and write to WebP.
","instance_methods":[{"html_id":"to_webp(io:IO,*,lossy:Bool=false,quality:Int32=100):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"
Write image to io using WebP encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","args_html":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/lib-formats/webp.cr#L59"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"splat_index":1,"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nsize, buffer = lossy ? lossy_encode(image_data, quality) : lossless_encode(image_data)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/grayscale_image.cr#L13"},{"filename":"src/jpeg.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/jpeg.cr#L4"},{"filename":"src/pluto.cr","line_number":42,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/pluto.cr#L42"},{"filename":"src/png.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/png.cr#L4"},{"filename":"src/stumpy.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L38"},{"filename":"src/webp.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/webp.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"
An image in Grayscale.
","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"
Read image_data as JPEG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_jpeg","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"handle = LibJPEGTurbo.init_decompress\ncheck_jpeg(handle, LibJPEGTurbo.decompress_header3(handle, image_data, image_data.size, out width, out height, out _subsampling, out _colorspace))\nbuffer = Bytes.new((width * height) * 3, 0)\ncheck_jpeg(handle, LibJPEGTurbo.decompress2(handle, image_data, LibC::ULong.new(image_data.size), buffer, width, 0, height, LibJPEGTurbo::PixelFormat::RGB, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nred = Array.new(width * height) do\n  ChannelType::Red.default\nend\ngreen = Array.new(width * height) do\n  ChannelType::Green.default\nend\nblue = Array.new(width * height) do\n  ChannelType::Blue.default\nend\nalpha = Array.new(width * height) do\n  ChannelType::Alpha.default\nend\n(width * height).times do |index|\n  red.unsafe_put(index, buffer[index * 3])\n  green.unsafe_put(index, buffer[(index * 3) + 1])\n  blue.unsafe_put(index, buffer[(index * 3) + 2])\nend\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_jpeg(io:IO):self-class-method","name":"from_jpeg","doc":"Construct an Image from reading in bytes from `io`","summary":"
Construct an Image from reading in bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_jpeg(io.getb_to_end)"}},{"html_id":"from_png(image_data:Bytes):self-class-method","name":"from_png","doc":"Read `image_data` and PNG encoded bytes","summary":"
Read image_data and PNG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_png","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"ctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::None)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_png_buffer(ctx, image_data, image_data.size)\ncheck_png(LibSPNG.get_ihdr(ctx, out ihdr))\ncheck_png(LibSPNG.decoded_image_size(ctx, LibSPNG::Format::RGBA8, out image_size))\nimage = Bytes.new(image_size.to_i, 0_u8)\ncheck_png(LibSPNG.decode_image(ctx, image, image_size, LibSPNG::Format::RGBA8, LibSPNG::DecodeFlags::None))\nLibSPNG.ctx_free(ctx)\nsize = image_size // 4\nwidth = size // ihdr.height\nheight = ihdr.height\nred = Array.new(size) do\n  0_u8\nend\ngreen = Array.new(size) do\n  0_u8\nend\nblue = Array.new(size) do\n  0_u8\nend\nalpha = Array.new(size) do\n  0_u8\nend\nsize.times do |index|\n  position = index * 4\n  red.unsafe_put(index, image[position + 0])\n  green.unsafe_put(index, image[position + 1])\n  blue.unsafe_put(index, image[position + 2])\n  alpha.unsafe_put(index, image[position + 3])\nend\nnew(red, green, blue, alpha, width.to_i, height.to_i)\n"}},{"html_id":"from_png(io:IO):self-class-method","name":"from_png","doc":"Construct an Image by reading bytes from `io`","summary":"
Construct an Image by reading bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_png(io.getb_to_end)"}},{"html_id":"from_ppm(image_data:Bytes):self-class-method","name":"from_ppm","doc":"Read `image_data` as PPM encoded bytes","summary":"
Read image_data as PPM encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_ppm","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"from_ppm(IO::Memory.new(image_data))"}},{"html_id":"from_ppm(io:IO):self-class-method","name":"from_ppm","doc":"Read bytes from `io` as PPM encoded","summary":"
Read bytes from io as PPM encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"_magic_number = io.gets(\"\\n\", chomp: true)\nwidth = (io.gets(\" \", chomp: true)).try(&.to_i)\nheight = (io.gets(\"\\n\", chomp: true)).try(&.to_i)\n_maximum_color_value = io.gets(\"\\n\", chomp: true)\nif width && height\n  red = Array.new(width * height) do\n    ChannelType::Red.default\n  end\n  green = Array.new(width * height) do\n    ChannelType::Green.default\n  end\n  blue = Array.new(width * height) do\n    ChannelType::Blue.default\n  end\n  alpha = Array.new(width * height) do\n    ChannelType::Alpha.default\n  end\n  (width * height).times do |index|\n    red_byte = io.read_byte\n    green_byte = io.read_byte\n    blue_byte = io.read_byte\n    if (red_byte && green_byte) && blue_byte\n      red.unsafe_put(index, red_byte)\n      green.unsafe_put(index, green_byte)\n      blue.unsafe_put(index, blue_byte)\n    else\n      raise(\"The image ends prematurely\")\n    end\n  end\n  new(red, green, blue, alpha, width, height)\nelse\n  raise(\"The image doesn't have width or height\")\nend\n"}},{"html_id":"from_webp(image_data:Bytes):self-class-method","name":"from_webp","doc":"Read `image_data` as WebP encoded bytes","summary":"
Read image_data as WebP encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_webp","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"check_webp(LibWebP.get_info(image_data, image_data.size, out width, out height))\nbuffer = LibWebP.decode_rgba(image_data, image_data.size, pointerof(width), pointerof(height))\nred = Array.new(width * height) do\n  0_u8\nend\ngreen = Array.new(width * height) do\n  0_u8\nend\nblue = Array.new(width * height) do\n  0_u8\nend\nalpha = Array.new(width * height) do\n  0_u8\nend\n(width * height).times do |index|\n  position = index * 4\n  red.unsafe_put(index, buffer[position])\n  green.unsafe_put(index, buffer[position + 1])\n  blue.unsafe_put(index, buffer[position + 2])\n  alpha.unsafe_put(index, buffer[position + 3])\nend\nLibWebP.free(buffer)\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_webp(io:IO):self-class-method","name":"from_webp","doc":"Read bytes from `io` as WebP encoded","summary":"
Read bytes from io as WebP encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_webp(io.getb_to_end)"}},{"html_id":"new(red:Array(UInt8),green:Array(UInt8),blue:Array(UInt8),alpha:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","doc":"Create a GrayscaleImage from a set of color channels (delegates to `RGBAImage#to_gray`)","summary":"
Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)
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Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)
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Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).
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Construct a simple threshold Mask containing all pixels with a UInt8 value greater than #threshold Given sample image:
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Construct a Mask identify all pixels larger than or equal to num.
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Crop the map, returning only the values in column at xstart
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Perform a brute force cross correlation calculation with provided template.
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Perform a Fast Fourier Transform cross correlation (convolution?) with provided template.
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Performe a Fast Fourier Transform, padding out this Map so dimensions are a power of 2.
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Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not
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Return the maximum value in this Map
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Return the minimum value in this Map
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Pad the borders of this Map corresponding to pad_type.
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Return the raw array underlying the map
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Return the shape of the map - {width, height}
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Size of the map - width * height
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Return the sum of all values in this Map
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Receive a copy of the underlying #raw array.
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Convert this Map to a ComplexMap
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Convert this Map to a GrayscaleImage.
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Mask is a wrapper around BitArray, where each flag represents a boolean bit of information about a pixel from an image.
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Construct a new Mask of width x height, preset to initial
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Construct a new Mask from an integer (useful for testing or small mask construction)
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Construct a new Mask from the dimensions of passed in image with an initial bit
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Construct a new Mask with a set width and bits from #bits
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Construct a new Mask of width x height using &block to determine if a bit should be true or not (passed in x and y coordinates)
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Construct a new Mask from an array of BitArray.
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at x and y
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Return a new BitArray corresponding to the partial row specified
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Return a new BitArray corresponding to the partial column specified
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Set the bit for coordinate x and y
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Set the bits for partial row xs at column y
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Set the bits for row x and partial columns ys
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Set the bits for partial rows xs and partial columns ys
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Apply this mask to the provided image with Operation::MaskApply#apply
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Apply this mask to the provided image with Operation::MaskApply#apply
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Closing operator
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Dilation operator
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Dilation operator
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Erosion operator
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Erosion operator
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Invert all bits in this instance of Mask.
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Opening operator
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Opening operator
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Returns the bounding box of the mask where all true bits are contained.
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Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).
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Blurs the image
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Brightens an image (increases white value)
","instance_methods":[{"html_id":"brightness(value:Float64):self-instance-method","name":"brightness","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/brightness.cr#L12"},"def":{"name":"brightness","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.brightness!(value)"}},{"html_id":"brightness!(value:Float64):self-instance-method","name":"brightness!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/brightness.cr#L16"},"def":{"name":"brightness!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"each_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, (    (channel.unsafe_fetch(index)) * value))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","path":"CrImage/Operation/ChannelSwap.html","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap","abstract":false,"locations":[{"filename":"src/cr-image/operation/channel_swap.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Swaps channels of `ChannelType` supported by an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.channel_swap(:green, :red) # Crystal autocasting of symbols to Pluto::ChannelType enum is magic\n```\n\"Channel","summary":"
Swaps channels of ChannelType supported by an image
","instance_methods":[{"html_id":"channel_swap(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L12"},"def":{"name":"channel_swap","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"clone.channel_swap!(a, b)"}},{"html_id":"channel_swap!(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap!","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/channel_swap.cr#L16"},"def":{"name":"channel_swap!","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"ch_a, ch_b = self[a], self[b]\nself[a] = ch_b\nself[b] = ch_a\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Contrast","path":"CrImage/Operation/Contrast.html","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast","abstract":false,"locations":[{"filename":"src/cr-image/operation/contrast.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Increases contrast of an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.contrast(20)\n```\n\"Contrasted","summary":"
Increases contrast of an image
","instance_methods":[{"html_id":"contrast(value:Float64):self-instance-method","name":"contrast","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L12"},"def":{"name":"contrast","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.contrast!(value)"}},{"html_id":"contrast!(value:Float64):self-instance-method","name":"contrast!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/contrast.cr#L16"},"def":{"name":"contrast!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"factor = (259 * (value + 255)) / (255 * (259 - value))\neach_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, Math.max(0, (factor * ((channel.unsafe_fetch(index)).to_i - 128)) + 128))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Crop","path":"CrImage/Operation/Crop.html","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop","abstract":false,"locations":[{"filename":"src/cr-image/operation/crop.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Crops an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\n# These calls are equivalent\nimage.crop(40, 30, 80, 80)\nimage[40...120, 30...110]\n```\n\"Cropped","summary":"
Crops an image
","instance_methods":[{"html_id":"[](xrange:Range,yrange:Range):self-instance-method","name":"[]","abstract":false,"args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"args_string":"(xrange : Range, yrange : Range) : self","args_html":"(xrange : Range, yrange : Range) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L22"},"def":{"name":"[]","args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"return_type":"self","visibility":"Public","body":"xstart, xcount = resolve_to_start_and_count(xrange, width)\nystart, ycount = resolve_to_start_and_count(yrange, height)\ncrop(xstart, ystart, xcount, ycount)\n"}},{"html_id":"crop(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : 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self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L14"},"def":{"name":"crop","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop(*region.to_tuple)"}},{"html_id":"crop!(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":32,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L32"},"def":{"name":"crop!","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n  self[channel_type] = (UInt8Map.new(width, channel))[x, new_width, y, new_height].raw\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"Crystal Image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L17"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\nimage.draw_line(50, 50, 70, 90, CrImage::Color.of(\"#0f0\"))\n```\n\"Woman\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"
Draws shapes in the image
","instance_methods":[{"html_id":"draw_circle(x:Int,y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle centered at x, y with radius","summary":"
Draw a circle centered at x, y with radius
","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L59"},"def":{"name":"draw_circle","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(x, y, radius, color, fill: fill)"}},{"html_id":"draw_circle(region:Region,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L54"},"def":{"name":"draw_circle","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":3,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_circle!(center_x:Int,center_y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle!","abstract":false,"args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":68,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L68"},"def":{"name":"draw_circle!","args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"min_x = Math.max(0, center_x - radius)\nmax_x = Math.min(width - 1, center_x + radius)\nmax_y = Math.min(height - 1, center_y + radius)\neach_color_channel do |channel, channel_type|\n  0.upto(radius) do |y|\n    theta_0 = Math.asin((Math.max(0, (    y - 1))) / radius.to_f)\n    theta_1 = Math.asin(y / radius.to_f)\n    x_0 = (radius * (Math.cos(theta_0))).round\n    x_1 = (radius * (Math.cos(theta_1))).round\n    lower_x_outer = (Math.max(min_x, center_x - x_0)).to_i\n    lower_x_inner = (Math.max(min_x, center_x - x_1)).to_i\n    upper_x_outer = (Math.min(max_x, center_x + x_0)).to_i\n    upper_x_inner = (Math.min(max_x, center_x + x_1)).to_i\n    lower_y = center_y - y\n    upper_y = center_y + y\n    lower_y_outside_of_image = (center_y - y) < 0 || (center_y - y) > max_y\n    upper_y_outside_of_image = (center_y + y) < 0 || (center_y + y) > max_y\n    left_outer_x_beyond_right_of_image = (center_x - x_0) > max_x\n    right_outer_x_beyond_left_of_image = (center_x + x_0) < 0\n    left_inner_x_beyond_left_of_image = (center_x - x_1) < 0\n    right_inner_x_beyond_right_of_image = (center_x + x_1) > max_x\n    if fill\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n    else\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, lower_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, upper_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n    end\n  end\nend\nself\n"}},{"html_id":"draw_circle!(region:Region,color:Color,*,fill:Bool=false,radius:Int32|Nil=nil):self-instance-method","name":"draw_circle!","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
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Implementation of http://www.edepot.com/linec.html
","abstract":false,"args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","args_html":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":139,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L139"},"def":{"name":"draw_line!","args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"if (0 <= x1 && x1 < width) && (0 <= y1 && y1 < height)\nelse\n  raise(Exception.new(\"First point (#{x1},#{y1}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nif (0 <= x2 && x2 < width) && (0 <= y2 && y2 < height)\nelse\n  raise(Exception.new(\"Second point (#{x2},#{y2}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nrise_by_height = false\nshort = y2 - y1\nlong = x2 - x1\nif short.abs > long.abs\n  short, long = long, short\n  rise_by_height = true\nend\nend_val = long\ngradient = long == 0 ? short : short / long.abs.to_f\nif rise_by_height\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + jump.to_i, y1 + i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nelse\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + i, y1 + jump.to_i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L22"},"def":{"name":"draw_square","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"clone.draw_square!(x, y, box_width, box_height, color, fill: fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L18"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L30"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n  raise(\"Box dimensions extend #{((x + box_width) - width) + 1} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n  raise(\"Box dimensions extend #{((y + box_height) - height) + 1} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_color_channel do |channel, channel_type|\n  channel[(  (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  box_height.times do |i|\n    if i == 0\n      next\n    end\n    if fill\n      channel[(      ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n        color[channel_type]\n      end\n    else\n      channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n      channel.unsafe_put(((((y_i + i) * width) + x_i) + box_width) - 1, color[channel_type])\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":26,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/draw.cr#L26"},"def":{"name":"draw_square!","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"draw_square!(*region.to_tuple, color, fill: fill)"}}]},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Applies a 3x3 Gaussian blur.
","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n  w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n  sizes << (if i < m\n    w_l\n  else\n    w_l + 2\n  end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"
Provides methods for histogram and histogram equalization.
","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":107,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L107"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":111,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L111"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":115,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L115"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_color_channel do |channel, channel_type|\n  if channel_type.alpha?\n    next\n  end\n  remap = (histogram(channel_type)).equalize\n  size.times do |i|\n    channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n  end\nend\nself\n"}}],"types":[{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"
A histogram of an Image for a specific ChannelType
","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L24"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"
Get the cumulative distribution for the image's histogram
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L56"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n  original = total\n  total = total + probability\n  {pixel, original}\nend.to_h)\n"}},{"html_id":"channel_type:CrImage::ChannelType-instance-method","name":"channel_type","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"channel_type","visibility":"Public","body":"@channel_type"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"
Get the raw counts for a given pixel value (0-255) in the image
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L30"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"
Remap the cumalitive distribution of pixels to get a new, more spread out pixel value
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L66"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n  {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"image:CrImage::Image-instance-method","name":"image","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"image","visibility":"Public","body":"@image"}},{"html_id":"mean:Float64-instance-method","name":"mean","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L74"},"def":{"name":"mean","return_type":"Float64","visibility":"Public","body":"@mean || (@mean = counts.sum do |pixel, count|\n  pixel.to_i64 * count\nend.to_f64 / @image.size)"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"
Get pixel counts normalized - all values between 0.0 and 1.0
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":47,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L47"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n  {pixel, count.to_f / @image.size}\nend.to_h"}},{"html_id":"std_dev:Float64-instance-method","name":"std_dev","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":80,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/histogram.cr#L80"},"def":{"name":"std_dev","return_type":"Float64","visibility":"Public","body":"@std_dev || (@std_dev = Math.sqrt(counts.sum do |value, count|\n  count * ((value.to_i64 - mean) ** 2)\nend.to_f64 / @image.size))"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the horizontal axis
","instance_methods":[{"html_id":"horizontal_blur(k:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(k)"}},{"html_id":"horizontal_blur!(k:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((k + k) + 1)\neach_color_channel do |channel|\n  @height.times do |y|\n    center_index : Int32 = y * @width\n    left__bound : Int32 = center_index\n    right_bound : Int32 = center_index + k\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last__value : Int32 = (channel.unsafe_fetch((center_index + @width) - 1)).to_i\n    current_sum : Int32 = (k + 1) * first_value\n    (0..(k - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + i))\n    end\n    (0..k).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      center_index = center_index + 1\n    end\n    ((k + 1)..((@width - k) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n    ((@width - k)..(@width - 1)).each do\n      current_sum = current_sum + (last__value - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |pixel, channel_type, x, y|\n  Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"
Apply a mask to an image
","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"
Black out all pixels but those found in the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"
Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"
TODO  add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? pixel : 0_u8\n  end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? (block.call(pixel, channel_type, i % width, i // width)) || pixel : pixel\n  end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"
Change the color of all pixels that match the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, channel_type|\n  color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/Pad","path":"CrImage/Operation/Pad.html","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad","abstract":false,"locations":[{"filename":"src/cr-image/operation/pad.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Pads an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.pad(left: 50, right: 50)\nimage.pad(left: 50, right: 50, pad_type: CrImage::EdgePolicy::Repeat)\n```\n\"Picture\n\"Picture","summary":"
Pads an image
","instance_methods":[{"html_id":"pad(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L14"},"def":{"name":"pad","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.pad!(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type)"}},{"html_id":"pad!(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad!","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/pad.cr#L18"},"def":{"name":"pad!","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"orig_width = width\neach_channel do |channel, channel_type|\n  padded = (UInt8Map.new(orig_width, channel)).pad(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type, pad_black_value: channel_type.default)\n  self[channel_type] = padded.raw\n  @width = padded.width\n  @height = padded.height\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Rotate","path":"CrImage/Operation/Rotate.html","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate","abstract":false,"locations":[{"filename":"src/cr-image/operation/rotate.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Rotates an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.rotate(45)\nimage.rotate(45, pad: true)\n```\n\"Rotated\n\"Rotated","summary":"
Rotates an image
","instance_methods":[{"html_id":"rotate(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate","doc":"Rotates an image by `degrees`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L20"},"def":{"name":"rotate","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.rotate!(degrees, center_x: center_x, center_y: center_y, radius: radius, pad: pad, pad_type: pad_type)"}},{"html_id":"rotate!(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate!","doc":"Rotates an image by `degrees`. Modifies `self`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees.
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/rotate.cr#L38"},"def":{"name":"rotate!","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"if pad_type.none?\n  raise(Exception.new(\"Edge policy None doesn't apply to rotation\"))\nend\nif pad && radius >= 0\n  raise(Exception.new(\"Can't pad image and limit rotation by radius\"))\nend\nradians = ((-Math::PI) * degrees) / 180\nsin = Math.sin(radians)\ncos = Math.cos(radians)\nradius_sq = radius * radius\nnew_width, new_size, out_center_x, out_center_y = output_dimensions(pad, degrees, center_x, center_y)\neach_channel do |channel, channel_type|\n  new_x = -1\n  new_y = 0\n  self[channel_type] = Array.new(new_size) do |i|\n    new_x = new_x + 1\n    if new_x == new_width\n      new_x = 0\n      new_y = new_y + 1\n    end\n    if radius >= 0 && (((new_x - center_x) ** 2) + ((new_y - center_y) ** 2)) > radius_sq\n      next channel.unsafe_fetch(i)\n    end\n    orig_x = (((cos * (new_x - out_center_x)) - (sin * (new_y - out_center_y))) + center_x).round.to_i\n    orig_y = (((sin * (new_x - out_center_x)) + (cos * (new_y - out_center_y))) + center_y).round.to_i\n    if pad_type.black?\n      if ((orig_x < 0 || orig_x >= width) || orig_y < 0) || orig_y >= height\n        next channel_type.default\n      end\n    else\n      orig_x = orig_x.clamp(0, width - 1)\n      orig_y = orig_y.clamp(0, height - 1)\n    end\n    channel.unsafe_fetch((orig_y * width) + orig_x)\n  end\nend\n@width = new_width\n@height = new_size // new_width\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the vertical axis
","instance_methods":[{"html_id":"vertical_blur(value:Int32):self-instance-method","name":"vertical_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L14"},"def":{"name":"vertical_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.vertical_blur!(value)"}},{"html_id":"vertical_blur!(value:Int32):self-instance-method","name":"vertical_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/operation/vertical_blur.cr#L18"},"def":{"name":"vertical_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_color_channel do |channel|\n  @width.times do |x|\n    center_index : Int32 = x\n    left_bound : Int32 = center_index\n    right_bound : Int32 = center_index + (value * @width)\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last_value : Int32 = (channel.unsafe_fetch(center_index + (@width * (@height - 1)))).to_i\n    current_sum : Int32 = (value + 1) * first_value\n    (0..(value - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + (i * @width)))\n    end\n    (0..value).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((value + 1)..((@height - value) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((@height - value)..(@height - 1)).each do\n      current_sum = current_sum + (last_value - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      center_index = center_index + @width\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]}]},{"html_id":"Crystal Image/CrImage/Region","path":"CrImage/Region.html","kind":"struct","full_name":"CrImage::Region","name":"Region","abstract":false,"superclass":{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},"ancestors":[{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/cr-image/region.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Represents a rectangular area on an `Image` from its upper left corner `x` and `y` coordinates, and a `width` and `height`.\n\nSee `Operation::Crop#crop` and `Operation::Draw#draw_square` for examples using it.","summary":"
Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.
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Return the {x, y} tuple of the center coordinates of this Region
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Read image_data as JPEG encoded bytes
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Construct an Image from reading in bytes from io
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Read image_data and PNG encoded bytes
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Construct an Image by reading bytes from io
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Read image_data as PPM encoded bytes
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Read bytes from io as PPM encoded
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Read image_data as WebP encoded bytes
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Read bytes from io as WebP encoded
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Set the corresponding channel_type with channel
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Return the alpha channel
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Return the blue channel
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Create a copy of this image
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Run provided block with the ChannelType::Red, ChannelType::Green, and ChannelType::Blue channels.
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Run provided block with the ChannelType::Red, ChannelType::Green, and ChannelType::Blue channels.
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Return the green channel
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Height of image
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Return the red channel
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Return the number of pixels in this image
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Convert color image to GrayscaleImage, using the NTSC formula as default values.
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Image/Pluto/Operation/VerticalBlur","kind":"module","full_name":"Pluto::Operation::VerticalBlur","name":"VerticalBlur"}],"namespace":{"html_id":"Crystal Image/Pluto","kind":"module","full_name":"Pluto","name":"Pluto"},"instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","doc":"Con","summary":"
Con
","abstract":false,"location":{"filename":"src/pluto.cr","line_number":23,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/pluto.cr#L23"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"CrImage::RGBAImage.new(red.clone, green.clone, blue.clone, alpha.clone, width, height)"}}]}]},{"html_id":"Crystal Image/StumpyCore","path":"StumpyCore.html","kind":"module","full_name":"StumpyCore","name":"StumpyCore","abstract":false,"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":3,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/canvas.cr#L3"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba.cr#L4"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/mixing.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/rgba/mixing.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/utils.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/utils.cr#L1"},{"filename":"src/stumpy.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"A module owned by [StumpyCr](https://github.com/stumpycr/stumpy_core)","summary":"
A module owned by StumpyCr
","types":[{"html_id":"Crystal Image/StumpyCore/Canvas","path":"StumpyCore/Canvas.html","kind":"class","full_name":"StumpyCore::Canvas","name":"Canvas","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":31,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/lib/stumpy_core/src/stumpy_core/canvas.cr#L31"},{"filename":"src/stumpy.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L6"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/StumpyCore","kind":"module","full_name":"StumpyCore","name":"StumpyCore"},"doc":"A canvas is 2D array of `RGBA` pixels\n\nTo create a canvas of size `400` x `200`\n\n```\ncanvas = StumpyCore::Canvas.new(400, 200)\n```\n\nThe default background color is transparent,\nbut it can be passed in as a parameter or as a block\nthat returns the color value for each `{x, y}` pair.\n\n```\ncanvas2 = StumpyCore::Canvas.new(400, 200, RGBA::WHITE)\n```\n\n```\ncanvas3 = StumpyCore::Canvas.new(256, 256) do |x, y|\n  RGBA.from_rgb_n(x, y, 255, 8)\nend\n```\n![image](https://github.com/stumpycr/stumpy_core/blob/feature/images/rainbow.png?raw=true)\n\nBecause of the way pixels are stored in a `Slice`,\n`Canvas`es are limited to `Int32::MAX = 2147483647` pixels in total,\ne.g. a maximal size of 46340x46340 for a square image.","summary":"
A canvas is 2D array of RGBA pixels
","instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","abstract":false,"location":{"filename":"src/stumpy.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/stumpy.cr#L7"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"size = width * height\nred = Array(UInt8).new(size)\ngreen = Array(UInt8).new(size)\nblue = Array(UInt8).new(size)\nalpha = Array(UInt8).new(size)\neach_row do |row|\n  row.each do |rgba|\n    red << (rgba.r >> 8).to_u8\n    green << (rgba.g >> 8).to_u8\n    blue << (rgba.b >> 8).to_u8\n    alpha << (rgba.a >> 8).to_u8\n  end\nend\nCrImage::RGBAImage.new(red, green, blue, alpha, width, height)\n"}}]}]},{"html_id":"Crystal Image/Tutorial","path":"Tutorial.html","kind":"module","full_name":"Tutorial","name":"Tutorial","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/chromakey_tutorial.cr#L35"},{"filename":"src/tutorials/tutorial.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/tutorial.cr#L7"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This fictional module exists to provide tutorials for using CrImage in the documentation\n\nSee:\n* `EdgeDetection`\n* `ChromaKey`\n* `FindDifferences`","summary":"
This fictional module exists to provide tutorials for using CrImage in the documentation
","types":[{"html_id":"Crystal Image/Tutorial/ChromaKey","path":"Tutorial/ChromaKey.html","kind":"module","full_name":"Tutorial::ChromaKey","name":"ChromaKey","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/chromakey_tutorial.cr#L35"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can swap out the background by creating a mask representing the pixels that are close in color, and replacing them using an `MaskApply#apply_color` method.\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"sample.jpg\")\n\n# Grab a color from the background, for comparison\nbackground = image[10, 10]\n\n# Construct a mask of all pixels within a color distance of our background\nbackground_mask = image.mask_from do |color|\n  # 25 chosen through trial-and-error\n  color.dist(background) < 25\nend\n  .closing! # Remove small `true` regions\n  .opening! # Remove small `false` regions\n\n# Now make the background blue\nimage\n  .apply_color(background_mask, CrImage::Color.of(\"#0000cc\"))\n  .save(\"chromakey.jpg\")\n```\n\nResults in image:\n\n\"Background\n\nThis script ran on my machine in `4ms` in `--release` mode.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/EdgeDetection","path":"Tutorial/EdgeDetection.html","kind":"module","full_name":"Tutorial::EdgeDetection","name":"EdgeDetection","abstract":false,"locations":[{"filename":"src/tutorials/edge_detection_tutorial.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/edge_detection_tutorial.cr#L38"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can run the [Sobel Operator](https://en.wikipedia.org/wiki/Sobel_operator) to detect edges in it:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nvertical_sobel = CrImage::IntMap.new([\n  [-1, -2, -1],\n  [0, 0, 0],\n  [1, 2, 1],\n])\n\nhorizontal_sobel = CrImage::IntMap.new([\n  [-1, 0, 1],\n  [-2, 0, 2],\n  [-1, 0, 1],\n])\n\nimage = CrImage::GrayscaleImage.open(\"sample.jpg\")\n\ndx = image.cross_correlate(horizontal_sobel)\ndy = image.cross_correlate(vertical_sobel)\n\n(dx ** 2 + dy ** 2).to_gray(scale: true).save(\"edge_detection.jpg\")\n```\n\nResults in image:\n\n\"Black\n\nThis script ran on my machine in `11ms` in `--release` mode.\n\n**Note**: This tutorial is using `cross_correlate`. For large images (or medium-to-large operators), the `cross_correlate_fft` may perform better.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/FindDifferences","path":"Tutorial/FindDifferences.html","kind":"module","full_name":"Tutorial::FindDifferences","name":"FindDifferences","abstract":false,"locations":[{"filename":"src/tutorials/find_differences.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/3c3ac18861233f5a0a4249be46c8f70b4c3735a2/src/tutorials/find_differences.cr#L55"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `differences.jpg` image:\n\n\"Two\n\nWe can programatically detect _most_ of the differences between these two images:\n\n```\nrequire \"../../src/cr-image\"\nrequire \"../../src/all_formats\"\n\nimage = CrImage::RGBAImage.open(\"differences.jpg\")\nret = image.clone\n\n# Perform a blur to remove random noise\nimg1 = image.gaussian_blur(1)[2...340, ..]\nimg2 = image.gaussian_blur(1)[361...699, ..]\n\n# Convert each color channel into a IntMap\nred_img1 = CrImage::UInt8Map.new(img1.width, img1.red).to_i\ngre_img1 = CrImage::UInt8Map.new(img1.width, img1.green).to_i\nblu_img1 = CrImage::UInt8Map.new(img1.width, img1.blue).to_i\nred_img2 = CrImage::UInt8Map.new(img2.width, img2.red).to_i\ngre_img2 = CrImage::UInt8Map.new(img2.width, img2.green).to_i\nblu_img2 = CrImage::UInt8Map.new(img2.width, img2.blue).to_i\n\n# Calculate a pixel by pixel difference calculation, convert it to a `Mask`\nred_mask = (red_img1 - red_img2).abs.>(50)\ngre_mask = (gre_img1 - gre_img2).abs.>(50)\nblu_mask = (blu_img1 - blu_img2).abs.>(50)\n\n# Combine the different color channel masks\ncombo_mask = (red_mask | blu_mask | gre_mask).dilate!\n\n# Expensive way to make a thick box.\n3.times do\n  combo_mask.dilate!.segments.each do |v|\n    # Draw a box in the first image\n    ret.draw_square!(v.region.x + 2, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n    # ... and the second image\n    ret.draw_square!(v.region.x + 361, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n  end\nend\n\nret.save(\"differences_end.jpg\")\n```\n\nResults in image:\n\n\"Two\n\nThis script ran on my machine in `66ms` in `--release` mode.\n\n**NOTE**: There's a difference in the seeds on one of the watermelons that don't survive the blurring process, and so aren't picked\nup by the differences algorithm above.","summary":"
Given differences.jpg image:
"}]}]}})
\ No newline at end of file
+crystal_doc_search_index_callback({"repository_name":"Crystal Image","body":"
Crystal Image (Processing)
\n\nThis shard aims to provide feature rich image processing abilities, both for the purpose of\nimage manipulation as well as feature / information extraction from those images.\n\nThe code here originated as a fork from [Pluto](https://github.com/phenopolis/pluto) and further takes inspiration from [Stumpy](https://github.com/stumpycr/stumpy_core),\nand support converting to and from both of those libraries.\n\nAll sample images used are from [Unsplash](https://unsplash.com/).\n\n## Installation\n\n1. Add the dependency to your `shard.yml`:\n\n   ```yaml\n   dependencies:\n     cr-image:\n       github: vici37/cr-image\n   ```\n\n2. Run `shards install`\n\n## Usage\n\nCrImage supports the formats:\n* PPM\n* JPEG (requires `libturbojpeg`)\n* PNG (requirens `libspng`)\n* WebP (requires `libwebp`)\n\nFor the formats that require a linked library, they must be `require`d explicitly:\n\n```crystal\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\nrequire \"cr-image/png\"\nrequire \"cr-image/webp\"\n\n# Or, alternatively\nrequire \"cr-image/all_formats\"\n```\n\n### Example\n\nAssuming an image `moon.jpg` already exists\n\n\"Picture\n\n```crystal\nrequire \"cr-image\"\n\nimage = CrImage::RGBAImage.open(\"moon.jpg\")\n\n# create a mask identifying all pixels with light (i.e. the moon)\nmoon_mask = image\n  .to_gray\n  .threshold(8) # pixels are UInt8, with 0 as black and 255 as white\n\n# Crop out the moon from the image, and save it to a new file\nimage.crop(\n  moon_mask.region # smallest area that encompasses all true bits in mask\n).save(\"moon_cropped.jpg\")\n\n```\n\nYields this image:\n\n\"Cropped\n\n[See the tutorials](http://troy.sornson.io/cr-image/Tutorial.html) for more examples.\n\n### [Pluto](https://github.com/phenopolis/pluto) and [Stumpy](https://github.com/stumpycr/stumpy_core) Conversion\n\nIf your library or application already uses Pluto or Stumpy and you want to use\nsome of the functionality of this library, CrImage also provides some optional\nconversion methods:\n\n```crystal\nrequire \"cr-image/pluto\"\npluto_image # => Pluto::ImageRGBA\npluto_image.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_pluto # => Pluto::ImageRGBA\n```\n\n**NOTE:** Currently Pluto and CrImage share the same bindings for `libturbojpeg`, `libspng`, and `libwebp`. If you\nuse Pluto, you _cannot_ use those formats from CrImage.\n\n\n```crystal\nrequire \"cr-image/stumpy\"\nstumpy_canvas # => StumpyCore::Canvas\nstumpy_canvas.to_crimage # => CrImage::RGBAImage\n\ncr_image # => CrImage::RGBAImage\ncr_image.to_stumpy # => StumpyCore::Canvas\n```\n\n**NOTE:** Stumpy uses `UInt16` for its underlying raw image storage per channel per pixel, while Pluto and\nCrImage uses `UInt8`. Converting from a Stumpy `Canvas` object to `RGBAImage` may lose quality if the original\nimage used 16 bit color channels (i.e. 16-bit PNG). Most image formats tend to use 8-bit color channels.\n\n## Development\n\nThis requires `libwebp`, `libspng`, and `libturbojpeg` to run. Then:\n\n```\n> make test\n```\n\nTo ensure all tests run and pass.\n\n## Contributing\n\n1. [Fork it](https://github.com/Vici37/cr-image/fork)\n2. Create your feature branch (`git checkout -b my-new-feature`)\n3. Commit your changes (`git commit -am 'Add some feature'`)\n4. Push to the branch (`git push origin my-new-feature`)\n5. Create a new Pull Request\n\n## Contributors\n\n- [Troy Sornson](https://github.com/Vici37) - creator and maintainer\n","program":{"html_id":"Crystal Image/toplevel","path":"toplevel.html","kind":"module","full_name":"Top Level Namespace","name":"Top Level Namespace","abstract":false,"locations":[],"repository_name":"Crystal Image","program":true,"enum":false,"alias":false,"const":false,"types":[{"html_id":"Crystal Image/CrImage","path":"CrImage.html","kind":"module","full_name":"CrImage","name":"CrImage","abstract":false,"locations":[{"filename":"src/cr-image.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image.cr#L20"},{"filename":"src/cr-image/edge_policy.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/edge_policy.cr#L1"},{"filename":"src/cr-image/map.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L1"},{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/bilinear_resize.cr#L14"},{"filename":"src/cr-image/region.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L1"},{"filename":"src/cr-image/window_view.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L1"},{"filename":"src/lib-formats/bindings/lib_jpeg_turbo.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_jpeg_turbo.cr#L1"},{"filename":"src/lib-formats/bindings/lib_spng.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_spng.cr#L1"},{"filename":"src/lib-formats/bindings/lib_webp.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/bindings/lib_webp.cr#L1"},{"filename":"src/pluto.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L35"},{"filename":"src/stumpy.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L28"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This module by itself isn't very interesting. Try taking a look through the [tutorials](./Tutorial.html) for better examples.","summary":"
This module by itself isn't very interesting.
","types":[{"html_id":"Crystal Image/CrImage/BlackView","path":"CrImage/BlackView.html","kind":"class","full_name":"CrImage::BlackView(T)","name":"BlackView","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},"ancestors":[{"html_id":"Crystal Image/CrImage/Window","kind":"class","full_name":"CrImage::Window","name":"Window"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/window_view.cr","line_number":76,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L76"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An implementation of `Window`, where the value of a point in the window that is off the edge of the underlying `Map` resolves to zero (or black)","summary":"
An implementation of Window, where the value of a point in the window that is off the edge of the underlying Map resolves to zero (or black)
","constructors":[{"html_id":"new(width,height,map,map_x,map_y)-class-method","name":"new","abstract":false,"args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"args_string":"(width, height, map, map_x, map_y)","args_html":"(width, height, map, map_x, map_y)","location":{"filename":"src/cr-image/window_view.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L17"},"def":{"name":"new","args":[{"name":"width","external_name":"width","restriction":""},{"name":"height","external_name":"height","restriction":""},{"name":"map","external_name":"map","restriction":""},{"name":"map_x","external_name":"map_x","restriction":""},{"name":"map_y","external_name":"map_y","restriction":""}],"visibility":"Public","body":"_ = BlackView(T).allocate\n_.initialize(width, height, map, map_x, map_y)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"[](x:Int32,y:Int32):T-instance-method","name":"[]","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32) : T","args_html":"(x : Int32, y : Int32) : T","location":{"filename":"src/cr-image/window_view.cr","line_number":77,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/window_view.cr#L77"},"def":{"name":"[]","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"}],"return_type":"T","visibility":"Public","body":"adjusted_x = (x - @half_width) + @map_x\nadjusted_y = (y - @half_height) + @map_y\nif (adjusted_x < 0 || adjusted_x >= @map.width) || (adjusted_y < 0 || adjusted_y >= @map.height)\n  return T.zero\nend\n@map[(adjusted_y * @map.width) + adjusted_x]\n"}}]},{"html_id":"Crystal Image/CrImage/ChannelType","path":"CrImage/ChannelType.html","kind":"enum","full_name":"CrImage::ChannelType","name":"ChannelType","abstract":false,"ancestors":[{"html_id":"Crystal Image/Enum","kind":"struct","full_name":"Enum","name":"Enum"},{"html_id":"Crystal Image/Comparable","kind":"module","full_name":"Comparable","name":"Comparable"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/channel_type.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":true,"alias":false,"const":false,"constants":[{"id":"Red","name":"Red","value":"0"},{"id":"Green","name":"Green","value":"1"},{"id":"Blue","name":"Blue","value":"2"},{"id":"Gray","name":"Gray","value":"3"},{"id":"Alpha","name":"Alpha","value":"4"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Enum representing different image channels supported by CrImage\n\nSee `RGBAImage#each_color_channel` and `GrayscaleImage#each_color_channel`","summary":"
Enum representing different image channels supported by CrImage
","instance_methods":[{"html_id":"alpha?-instance-method","name":"alpha?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":9,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L9"},"def":{"name":"alpha?","visibility":"Public","body":"self == Alpha"}},{"html_id":"blue?-instance-method","name":"blue?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L7"},"def":{"name":"blue?","visibility":"Public","body":"self == Blue"}},{"html_id":"default:UInt8-instance-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L11"},"def":{"name":"default","return_type":"UInt8","visibility":"Public","body":"alpha? ? 255_u8 : 0_u8"}},{"html_id":"gray?-instance-method","name":"gray?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L8"},"def":{"name":"gray?","visibility":"Public","body":"self == Gray"}},{"html_id":"green?-instance-method","name":"green?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L6"},"def":{"name":"green?","visibility":"Public","body":"self == Green"}},{"html_id":"red?-instance-method","name":"red?","abstract":false,"location":{"filename":"src/cr-image/channel_type.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/channel_type.cr#L5"},"def":{"name":"red?","visibility":"Public","body":"self == Red"}}]},{"html_id":"Crystal Image/CrImage/Color","path":"CrImage/Color.html","kind":"class","full_name":"CrImage::Color","name":"Color","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/color.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Utility class for parsing and representing colors that can be used for certain\nmethods in CrImage.\n\nSee `Operation::MaskApply#apply_color`, `Operation::Draw#draw_square`, or `Operation::Draw#draw_circle`","summary":"
Utility class for parsing and representing colors that can be used for certain methods in CrImage.
","constructors":[{"html_id":"default:Color-class-method","name":"default","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L11"},"def":{"name":"default","return_type":"Color","visibility":"Public","body":"new(ChannelType::Red.default, ChannelType::Green.default, ChannelType::Blue.default, ChannelType::Alpha.default)"}},{"html_id":"new(red:UInt8,green:UInt8,blue:UInt8,alpha:UInt8=ChannelType::Alpha.default)-class-method","name":"new","abstract":false,"args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"args_string":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","args_html":"(red : UInt8, green : UInt8, blue : UInt8, alpha : UInt8 = ChannelType::Alpha.default)","location":{"filename":"src/cr-image/color.cr","line_number":8,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L8"},"def":{"name":"new","args":[{"name":"red","external_name":"red","restriction":"UInt8"},{"name":"green","external_name":"green","restriction":"UInt8"},{"name":"blue","external_name":"blue","restriction":"UInt8"},{"name":"alpha","default_value":"ChannelType::Alpha.default","external_name":"alpha","restriction":"UInt8"}],"visibility":"Public","body":"_ = allocate\n_.initialize(red, green, blue, alpha)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}},{"html_id":"of(color:String):Color-class-method","name":"of","doc":"Parse color from a hex string:\n\n```\nColor.of(\"#1\")        # same as \"#11\" => Color.new(17, 17, 17, 255)\nColor.of(\"#01\")       # => Color.new(1, 1, 1, 255)\nColor.of(\"#123\")      # same as \"#112233\" => Color.new(17, 34, 51, 255)\nColor.of(\"#1234\")     # same as \"#11223344\" => Color.new(34, 51, 68, 17)\nColor.of(\"#010203\")   # => Color.new(1, 2, 3, 255)\nColor.of(\"#01020304\") # => Color.new(2, 3, 4, 1)\n```","summary":"
Parse color from a hex string:
","abstract":false,"args":[{"name":"color","external_name":"color","restriction":"String"}],"args_string":"(color : String) : Color","args_html":"(color : String) : Color","location":{"filename":"src/cr-image/color.cr","line_number":49,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L49"},"def":{"name":"of","args":[{"name":"color","external_name":"color","restriction":"String"}],"return_type":"Color","visibility":"Public","body":"if ((!(color.starts_with?(\"#\"))) || (!({2, 3, 4, 5, 7, 9}.includes?(color.size)))) || (color.match(/^#[^0-9a-f]/i))\n  raise(\"Invalid hex color '#{color}': must start with '#' followed by 1, 2, 3, 4, 6, or 9 alphanumeric characters (0-9 or a-f)\")\nend\ncase color.size\nwhen 2\n  gray = (color[1].to_i(16)).to_u8\n  gray = (gray << 4) + gray\n  self.new(gray, gray, gray)\nwhen 3\n  gray = (color[1, 2].to_i(16)).to_u8\n  self.new(gray, gray, gray)\nwhen 4\n  red = (color[1].to_i(16)).to_u8\n  green = (color[2].to_i(16)).to_u8\n  blue = (color[3].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue)\nwhen 5\n  alpha = (color[1].to_i(16)).to_u8\n  red = (color[2].to_i(16)).to_u8\n  green = (color[3].to_i(16)).to_u8\n  blue = (color[4].to_i(16)).to_u8\n  self.new((red << 4) + red, (green << 4) + green, (blue << 4) + blue, (alpha << 4) + alpha)\nwhen 7\n  red = (color[1, 2].to_i(16)).to_u8\n  green = (color[3, 2].to_i(16)).to_u8\n  blue = (color[5, 2].to_i(16)).to_u8\n  self.new(red, green, blue)\nelse\n  alpha = (color[1, 2].to_i(16)).to_u8\n  red = (color[3, 2].to_i(16)).to_u8\n  green = (color[5, 2].to_i(16)).to_u8\n  blue = (color[7, 2].to_i(16)).to_u8\n  self.new(red, green, blue, alpha)\nend\n"}},{"html_id":"random:Color-class-method","name":"random","doc":"Generate a random color with full (255) opacity","summary":"
Generate a random color with full (255) opacity
","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L16"},"def":{"name":"random","return_type":"Color","visibility":"Public","body":"r = Random.new\nnew(r.rand(UInt8), r.rand(UInt8), r.rand(UInt8), ChannelType::Alpha.default)\n"}}],"instance_methods":[{"html_id":"==(other:Color):Bool-instance-method","name":"==","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"}],"args_string":"(other : Color) : Bool","args_html":"(other : Color) : Bool","location":{"filename":"src/cr-image/color.cr","line_number":93,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L93"},"def":{"name":"==","args":[{"name":"other","external_name":"other","restriction":"Color"}],"return_type":"Bool","visibility":"Public","body":"(((red == other.red) && (green == other.green)) && (blue == other.blue)) && (alpha == other.alpha)"}},{"html_id":"[](channel_type:ChannelType):UInt8-instance-method","name":"[]","doc":"Receive the UInt8 portion of this color corresponding to `channel_type`","summary":"
Receive the UInt8 portion of this color corresponding to channel_type
","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : UInt8","args_html":"(channel_type : ChannelType) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L29"},"def":{"name":"[]","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"UInt8","visibility":"Public","body":"case channel_type\nin ChannelType::Red\n  red\nin ChannelType::Green\n  green\nin ChannelType::Blue\n  blue\nin ChannelType::Alpha\n  alpha\nin ChannelType::Gray\n  gray\nend"}},{"html_id":"alpha:UInt8-instance-method","name":"alpha","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"alpha","visibility":"Public","body":"@alpha"}},{"html_id":"blue:UInt8-instance-method","name":"blue","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"blue","visibility":"Public","body":"@blue"}},{"html_id":"dist(other:Color,*,manhattan:Bool=false):Float64-instance-method","name":"dist","abstract":false,"args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"args_string":"(other : Color, *, manhattan : Bool = false) : Float64","args_html":"(other : Color, *, manhattan : Bool = false) : Float64","location":{"filename":"src/cr-image/color.cr","line_number":100,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L100"},"def":{"name":"dist","args":[{"name":"other","external_name":"other","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"manhattan","default_value":"false","external_name":"manhattan","restriction":"Bool"}],"splat_index":1,"return_type":"Float64","visibility":"Public","body":"if manhattan\n  ((red.to_f - other.red).abs + (blue.to_i - other.blue).abs) + (green.to_i - other.green).abs\nelse\n  Math.sqrt((((red.to_i - other.red) ** 2) + ((green.to_i - other.green) ** 2)) + ((blue.to_i - other.blue) ** 2))\nend"}},{"html_id":"gray(red_multiplier:Float=0.299,green_multiplier:Float=0.587,blue_multiplier:Float=0.114):UInt8-instance-method","name":"gray","doc":"Convert this Color to a single UInt8 gray value","summary":"
Convert this Color to a single UInt8 gray value
","abstract":false,"args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"args_string":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","args_html":"(red_multiplier : Float = 0.299, green_multiplier : Float = 0.587, blue_multiplier : Float = 0.114) : UInt8","location":{"filename":"src/cr-image/color.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L22"},"def":{"name":"gray","args":[{"name":"red_multiplier","default_value":"0.299","external_name":"red_multiplier","restriction":"Float"},{"name":"green_multiplier","default_value":"0.587","external_name":"green_multiplier","restriction":"Float"},{"name":"blue_multiplier","default_value":"0.114","external_name":"blue_multiplier","restriction":"Float"}],"return_type":"UInt8","visibility":"Public","body":"Math.min(255_u8, (((red * red_multiplier) + (blue * blue_multiplier)) + (green * green_multiplier)).to_u8)"}},{"html_id":"green:UInt8-instance-method","name":"green","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"green","visibility":"Public","body":"@green"}},{"html_id":"red:UInt8-instance-method","name":"red","abstract":false,"location":{"filename":"src/cr-image/color.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/color.cr#L6"},"def":{"name":"red","visibility":"Public","body":"@red"}}]},{"html_id":"Crystal Image/CrImage/ComplexMap","path":"CrImage/ComplexMap.html","kind":"class","full_name":"CrImage::ComplexMap","name":"ComplexMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":606,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L606"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"instance_methods":[{"html_id":"ifft:FloatMap-instance-method","name":"ifft","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":609,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L609"},"def":{"name":"ifft","return_type":"FloatMap","visibility":"Public","body":"FloatMap.new(width, (FftUtil.ifft2d(width, raw)).map(&.real))"}},{"html_id":"to_c:ComplexMap-instance-method","name":"to_c","doc":"Convert this `Map` to a `ComplexMap`","summary":"
Convert this Map to a ComplexMap
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A general enum for determining behavior around edges of Image or Maps.
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Utility class for Fast Fourier Transforms
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Perform Fast Fourier Transform on inp.
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Perform Fast Fourier Transform on inp.
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Calculates Fast Fourier Transform of ret.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
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Perform Fast Fourier Transform, using and rewriting ret for the output, as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L28"},"def":{"name":"fft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.fft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.fft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}},{"html_id":"ifft1d(inp:Array(Complex),buffer:Array(Complex)=inp.dup):Array(Complex)-class-method","name":"ifft1d","doc":"Perform Inverse Fast Fourier Transform on `inp`.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`.","summary":"
Perform Inverse Fast Fourier Transform on inp.
","abstract":false,"args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","args_html":"(inp : Array(Complex), buffer : Array(Complex) = inp.dup) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":165,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L165"},"def":{"name":"ifft1d","args":[{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"inp.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"if inp.size == inp.size.next_power_of_two\nelse\n  raise(Exception.new(\"Input is of size #{inp.size}, which is not a power of 2 (next power of 2: #{inp.size.next_power_of_two})\"))\nend\nFftUtil.ifft1d_unsafe(inp.dup, buffer)\n"}},{"html_id":"ifft1d_unsafe(ret:Array(Complex)|Slice(Complex),buffer:Array(Complex)=ret.dup):Array(Complex)|Slice(Complex)-class-method","name":"ifft1d_unsafe","doc":"Perform Inverse Fast Fourier Transform on `ret`. Will use and overwrite the original values in `ret` to do so.\n\nCan optionally pass in `buffer` which must be at least the same size of `inp`. This method makes no bound checks or error checks.","summary":"
Perform Inverse Fast Fourier Transform on ret.
","abstract":false,"args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","args_html":"(ret : Array(Complex) | Slice(Complex), buffer : Array(Complex) = ret.dup) : Array(Complex) | Slice(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":173,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L173"},"def":{"name":"ifft1d_unsafe","args":[{"name":"ret","external_name":"ret","restriction":"Array(Complex) | Slice(Complex)"},{"name":"buffer","default_value":"ret.dup","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex) | Slice(Complex)","visibility":"Public","body":"shape = 1\nhalf = ret.size\nreal_half = (ret.size >> 1)\nwhile half > 1\n  double_half = half\n  half = half >> 1\n  neg_i_pi_div_shape = Math::PI.i / shape\n  buffer.to_unsafe.copy_from(ret.to_unsafe, ret.size)\n  half_offset = half\n  shape.times do |i|\n    term = Math.exp(neg_i_pi_div_shape * i)\n    half.times do |j|\n      offset = j + half_offset\n      buffer.unsafe_put(offset, (buffer.unsafe_fetch(offset)) * term)\n    end\n    half_offset = half_offset + double_half\n  end\n  offset = -1\n  counter = -1\n  real_half.times do |i|\n    offset = offset + 1\n    counter = counter + 1\n    if counter == half\n      counter = 0\n      offset = offset + half\n    end\n    ret.unsafe_put(i, (buffer.unsafe_fetch(offset)) + (buffer.unsafe_fetch(offset + half)))\n    ret.unsafe_put(i + real_half, (buffer.unsafe_fetch(offset)) - (buffer.unsafe_fetch(offset + half)))\n  end\n  shape = shape << 1\nend\nret.map!(&./(ret.size))\n"}},{"html_id":"ifft2d(width:Int32,inp:Array(Complex),buffer:Array(Complex)|Nil=nil):Array(Complex)-class-method","name":"ifft2d","doc":"Perform Inverse Fast Fourier Transform, treating as `inp` as a 2 dimensional array with `width`.\n\nCan optionally pass in `buffer` which must be an array at least the larger of `width` or `inp.size // width`.","summary":"
Perform Inverse Fast Fourier Transform, treating as inp as a 2 dimensional array with width.
","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"args_string":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","args_html":"(width : Int32, inp : Array(Complex), buffer : Array(Complex) | Nil = nil) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":124,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L124"},"def":{"name":"ifft2d","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"inp","external_name":"inp","restriction":"Array(Complex)"},{"name":"buffer","default_value":"nil","external_name":"buffer","restriction":"Array(Complex) | ::Nil"}],"return_type":"Array(Complex)","visibility":"Public","body":"if width == width.next_power_of_two\nelse\n  raise(Exception.new(\"Width #{width} must be power of 2 (next power of two: #{width.next_power_of_two})\"))\nend\nheight = inp.size // width\nif height == height.next_power_of_two\nelse\n  raise(Exception.new(\"Input height #{height} must be power of 2 (next power of two: #{(height).next_power_of_two})\"))\nend\nif buf = buffer\nelse\n  buf = Array(Complex).new(Math.max(width, inp.size // width)) do\n    Complex.zero\n  end\nend\nFftUtil.ifft2d_unsafe(width, inp.dup, buf)\n"}},{"html_id":"ifft2d_unsafe(width:Int32,ret:Array(Complex),buffer:Array(Complex)):Array(Complex)-class-method","name":"ifft2d_unsafe","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"args_string":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","args_html":"(width : Int32, ret : Array(Complex), buffer : Array(Complex)) : Array(Complex)","location":{"filename":"src/cr-image/fft_util.cr","line_number":135,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/fft_util.cr#L135"},"def":{"name":"ifft2d_unsafe","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"ret","external_name":"ret","restriction":"Array(Complex)"},{"name":"buffer","external_name":"buffer","restriction":"Array(Complex)"}],"return_type":"Array(Complex)","visibility":"Public","body":"height = ret.size // width\nheight_buffer = Array(Complex).new(height) do\n  Complex.zero\nend\nbeginning = -width\nheight.times do\n  beginning = beginning + width\n  slice = Slice(Complex).new(ret.to_unsafe + beginning, width)\n  FftUtil.ifft1d_unsafe(slice, buffer)\nend\nwidth.times do |x|\n  spot = 0\n  height.times do |i|\n    height_buffer.unsafe_put(i, ret.unsafe_fetch(spot + x))\n    spot = spot + width\n  end\n  FftUtil.ifft1d_unsafe(height_buffer, buffer)\n  spot = 0\n  height.times do |i|\n    ret.unsafe_put(spot + x, height_buffer.unsafe_fetch(i))\n    spot = spot + width\n  end\nend\nret\n"}}]},{"html_id":"Crystal Image/CrImage/FloatMap","path":"CrImage/FloatMap.html","kind":"class","full_name":"CrImage::FloatMap","name":"FloatMap","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"},{"html_id":"Crystal Image/CrImage/NumericMap","kind":"module","full_name":"CrImage::NumericMap","name":"NumericMap"},{"html_id":"Crystal Image/CrImage/Map","kind":"module","full_name":"CrImage::Map","name":"Map"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/map.cr","line_number":508,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L508"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/MapImpl","kind":"module","full_name":"CrImage::MapImpl","name":"MapImpl"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Implementation of `MapImpl` for `Float64` types.","summary":"
Implementation of MapImpl for Float64 types.
","instance_methods":[{"html_id":"to_f:FloatMap-instance-method","name":"to_f","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":519,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L519"},"def":{"name":"to_f","return_type":"FloatMap","visibility":"Public","body":"self"}},{"html_id":"to_f64:self-instance-method","name":"to_f64","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":511,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L511"},"def":{"name":"to_f64","return_type":"self","visibility":"Public","body":"self"}},{"html_id":"to_i:IntMap-instance-method","name":"to_i","abstract":false,"location":{"filename":"src/cr-image/map.cr","line_number":515,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L515"},"def":{"name":"to_i","return_type":"IntMap","visibility":"Public","body":"IntMap.new(width, @raw.map(&.to_i))"}}],"macros":[{"html_id":"method_missing(call)-macro","name":"method_missing","abstract":false,"args":[{"name":"call","external_name":"call","restriction":""}],"args_string":"(call)","args_html":"(call)","location":{"filename":"src/cr-image/map.cr","line_number":509,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/map.cr#L509"},"def":{"name":"method_missing","args":[{"name":"call","external_name":"call","restriction":""}],"visibility":"Public","body":"          def \n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n : self\n            self.class.new(width, @raw.map(&.\n{{ call.name.id }}\n{% if call.args.size > 0 %}({{ (call.args.join(\", \")).id }}){% end %}\n))\n          \nend\n        \n"}}]},{"html_id":"Crystal Image/CrImage/Format","path":"CrImage/Format.html","kind":"module","full_name":"CrImage::Format","name":"Format","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"constants":[{"id":"SUPPORTED_FORMATS","name":"SUPPORTED_FORMATS","value":"[{extension: \".ppm\", method: \"ppm\"}, {extension: \".jpeg\", method: \"jpeg\"}, {extension: \".jpg\", method: \"jpeg\"}, {extension: \".png\", method: \"png\"}, {extension: \".webp\", method: \"webp\"}] of Nil"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Provides a convenience method for saving image files to the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage.save(\"image.jpg\")\n```\nSee `Open` for a convenience method to read images from the filesystem","summary":"
Provides a convenience method for saving image files to the filesystem.
","types":[{"html_id":"Crystal Image/CrImage/Format/JPEG","path":"CrImage/Format/JPEG.html","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG","abstract":false,"locations":[{"filename":"src/lib-formats/jpeg.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/jpeg.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to jpeg. Requires `libturbojpeg` to function.\n\n```\nimage = File.open(\"image.jpg\") { |file| CrImage::RGBAImage.from_jpeg(file) }\nFile.open(\"other_image.jpg\") { |file| image.to_jpeg(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\nimage.save(\"other_image.jpg\")\n```","summary":"
Provides methods to read from and write to jpeg.
","instance_methods":[{"html_id":"to_jpeg(io:IO,quality:Int32=100):Nil-instance-method","name":"to_jpeg","doc":"Output the image as JPEG to `io`","summary":"
Output the image as JPEG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, quality : Int32 = 100) : Nil","args_html":"(io : IO, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/jpeg.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/jpeg.cr#L74"},"def":{"name":"to_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"return_type":"Nil","visibility":"Public","body":"handle = LibJPEGTurbo.init_compress\nimage_data = IO::Memory.new(size * 3)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\nend\nbuffer = Pointer(UInt8).null\ncheck_jpeg(handle, LibJPEGTurbo.compress2(handle, image_data.buffer, @width, 0, @height, LibJPEGTurbo::PixelFormat::RGB, pointerof(buffer), out size, LibJPEGTurbo::Subsampling::S444, quality, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibJPEGTurbo.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Open","path":"CrImage/Format/Open.html","kind":"module","full_name":"CrImage::Format::Open","name":"Open","abstract":false,"locations":[{"filename":"src/cr-image/format/open.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/open.cr#L12"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides a convenience method for opening up image files from the filesystem.\nCurrently supports:\n* PPM (`.ppm`)\n* WebP (`.webp`)\n* JPEG (`.jpeg`, `.jpg`)\n* PNG (`.png`)\n\n```\nimage = CrImage::RGBAImage.open(\"image.jpg\")\n```\nSee `Save` for a convenience method to write to the filesystem.","summary":"
Provides a convenience method for opening up image files from the filesystem.
","instance_methods":[{"html_id":"open(filename:String):self-instance-method","name":"open","doc":"Reads this image from file using the provided filename.","summary":"
Reads this image from file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/open.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/open.cr#L14"},"def":{"name":"open","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"{% if true %}\n    case filename\n    {% for format in SUPPORTED_FORMATS %}\n      when .ends_with?({{ format[:extension] }}) then File.open(filename) { |file| self.from_{{ format[:method].id }}(file) }\n    {% end %}\n      else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n  __arg0[:extension].id\nend.join(\", \")).id }}\"\n    end\n    {% end %}"}}]},{"html_id":"Crystal Image/CrImage/Format/PNG","path":"CrImage/Format/PNG.html","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG","abstract":false,"locations":[{"filename":"src/lib-formats/png.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/png.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PNG. Requires `libspng` to function.\n\n```\nimage = File.open(\"image.png\") { |file| CrImage::RGBAImage.from_png(file) }\nFile.open(\"other_image.png\") { |file| image.to_png(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.png\")\nimage.save(\"other_image.png\")\n```","summary":"
Provides methods to read from and write to PNG.
","instance_methods":[{"html_id":"to_png(io:IO):Nil-instance-method","name":"to_png","doc":"Output the image as PNG to `io`","summary":"
Output the image as PNG to io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/lib-formats/png.cr","line_number":72,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/png.cr#L72"},"def":{"name":"to_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::Encoder)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_option(ctx, LibSPNG::Option::EncodeToBuffer, true)\nLibSPNG.set_png_buffer(ctx, image_data.buffer, image_data.size)\nihdr = LibSPNG::IHDR.new\nihdr.width = @width\nihdr.height = @height\nihdr.color_type = LibSPNG::ColorType::TrueColorAlpha\nihdr.bit_depth = 8\nLibSPNG.set_ihdr(ctx, pointerof(ihdr))\nerror = LibSPNG.encode_image(ctx, image_data.buffer, image_data.size, LibSPNG::Format::PNG, LibSPNG::EncodeFlags::Finalize)\ncheck_png(error)\nbuffer = LibSPNG.get_png_buffer(ctx, out size, pointerof(error))\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to get a buffer\"))\nend\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibC.free(buffer)\n"}}]},{"html_id":"Crystal Image/CrImage/Format/PPM","path":"CrImage/Format/PPM.html","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM","abstract":false,"locations":[{"filename":"src/cr-image/format/ppm.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/ppm.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to PPM.\n\n```\nimage = File.open(\"image.ppm\") { |file| CrImage::RGBAImage.from_ppm(file) }\nFile.open(\"other_image.ppm\") { |file| image.to_ppm(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.ppm\")\nimage.save(\"other_image.ppm\")\n```","summary":"
Provides methods to read from and write to PPM.
","instance_methods":[{"html_id":"to_ppm(io:IO):Nil-instance-method","name":"to_ppm","doc":"Output this image to `io` using PPM image encoding","summary":"
Output this image to io using PPM image encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : Nil","args_html":"(io : IO) : Nil","location":{"filename":"src/cr-image/format/ppm.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/ppm.cr#L56"},"def":{"name":"to_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"Nil","visibility":"Public","body":"io << \"P6\\n\"\n(((io << @width) << \" \") << @height) << \"\\n\"\nio << \"255\\n\"\nsize.times do |index|\n  io.write_byte(red.unsafe_fetch(index))\n  io.write_byte(green.unsafe_fetch(index))\n  io.write_byte(blue.unsafe_fetch(index))\nend\n"}}]},{"html_id":"Crystal Image/CrImage/Format/Save","path":"CrImage/Format/Save.html","kind":"module","full_name":"CrImage::Format::Save","name":"Save","abstract":false,"locations":[{"filename":"src/cr-image/format/save.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"instance_methods":[{"html_id":"save(filename:String):self-instance-method","name":"save","doc":"Write this image to file using the provided filename.\n\nThis method _will not_ create intermediate directory paths. This method will throw an\nerror if they don't exist.","summary":"
Write this image to file using the provided filename.
","abstract":false,"args":[{"name":"filename","external_name":"filename","restriction":"String"}],"args_string":"(filename : String) : self","args_html":"(filename : String) : self","location":{"filename":"src/cr-image/format/save.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/format/save.cr#L20"},"def":{"name":"save","args":[{"name":"filename","external_name":"filename","restriction":"String"}],"return_type":"self","visibility":"Public","body":"File.open(filename, \"w\") do |file|\n  {% if true %}\n        case filename\n        {% for format in SUPPORTED_FORMATS %}\n          when .ends_with?({{ format[:extension] }}) then to_{{ format[:method].id }}(file)\n        {% end %}\n          else raise Exception.new \"Unknown file extension for filename #{filename}, cr-image only supports {{ (CrImage::Format::SUPPORTED_FORMATS.map() do |__arg0|\n    __arg0[:extension].id\n  end.join(\", \")).id }}\"\n        end\n        {% end %}\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Format/WebP","path":"CrImage/Format/WebP.html","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP","abstract":false,"locations":[{"filename":"src/lib-formats/webp.cr","line_number":15,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/webp.cr#L15"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Format","kind":"module","full_name":"CrImage::Format","name":"Format"},"doc":"Provides methods to read from and write to WebP. Requires `libwebp` to function.\n\n```\nimage = File.open(\"image.webp\") { |file| CrImage::RGBAImage.from_webp(file) }\nFile.open(\"other_image.webp\") { |file| image.to_webp(file) }\n```\nAlternatively, you can use the convenience methods in the `Open` and `Save` modules\nto acheive the same thing:\n```\nimage = CrImage::RGBAImage.open(\"image.webp\")\nimage.save(\"other_image.webp\")\n```","summary":"
Provides methods to read from and write to WebP.
","instance_methods":[{"html_id":"to_webp(io:IO,*,lossy:Bool=false,quality:Int32=100):Nil-instance-method","name":"to_webp","doc":"Write image to `io` using WebP encoding","summary":"
Write image to io using WebP encoding
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"args_string":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","args_html":"(io : IO, *, lossy : Bool = false, quality : Int32 = 100) : Nil","location":{"filename":"src/lib-formats/webp.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/lib-formats/webp.cr#L59"},"def":{"name":"to_webp","args":[{"name":"io","external_name":"io","restriction":"IO"},{"name":"","external_name":"","restriction":""},{"name":"lossy","default_value":"false","external_name":"lossy","restriction":"Bool"},{"name":"quality","default_value":"100","external_name":"quality","restriction":"Int32"}],"splat_index":1,"return_type":"Nil","visibility":"Public","body":"image_data = IO::Memory.new(size * 4)\nsize.times do |index|\n  image_data.write_byte(red.unsafe_fetch(index))\n  image_data.write_byte(green.unsafe_fetch(index))\n  image_data.write_byte(blue.unsafe_fetch(index))\n  image_data.write_byte(alpha.unsafe_fetch(index))\nend\nsize, buffer = lossy ? lossy_encode(image_data, quality) : lossless_encode(image_data)\ncheck_webp(size)\nbytes = Bytes.new(buffer, size)\nio.write(bytes)\nLibWebP.free(buffer)\n"}}]}]},{"html_id":"Crystal Image/CrImage/GrayscaleImage","path":"CrImage/GrayscaleImage.html","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage","abstract":false,"superclass":{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},"ancestors":[{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Image","kind":"class","full_name":"CrImage::Image","name":"Image"},{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/grayscale_image.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/grayscale_image.cr#L13"},{"filename":"src/jpeg.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/jpeg.cr#L4"},{"filename":"src/pluto.cr","line_number":42,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L42"},{"filename":"src/png.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/png.cr#L4"},{"filename":"src/stumpy.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L38"},{"filename":"src/webp.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/webp.cr#L4"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"included_modules":[{"html_id":"Crystal Image/CrImage/Format/JPEG","kind":"module","full_name":"CrImage::Format::JPEG","name":"JPEG"},{"html_id":"Crystal Image/CrImage/Format/PNG","kind":"module","full_name":"CrImage::Format::PNG","name":"PNG"},{"html_id":"Crystal Image/CrImage/Format/PPM","kind":"module","full_name":"CrImage::Format::PPM","name":"PPM"},{"html_id":"Crystal Image/CrImage/Format/Save","kind":"module","full_name":"CrImage::Format::Save","name":"Save"},{"html_id":"Crystal Image/CrImage/Format/WebP","kind":"module","full_name":"CrImage::Format::WebP","name":"WebP"},{"html_id":"Crystal Image/CrImage/Operation/BilinearResize","kind":"module","full_name":"CrImage::Operation::BilinearResize","name":"BilinearResize"},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur"},{"html_id":"Crystal Image/CrImage/Operation/Brightness","kind":"module","full_name":"CrImage::Operation::Brightness","name":"Brightness"},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap"},{"html_id":"Crystal Image/CrImage/Operation/Contrast","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast"},{"html_id":"Crystal Image/CrImage/Operation/Crop","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop"},{"html_id":"Crystal Image/CrImage/Operation/Draw","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw"},{"html_id":"Crystal Image/CrImage/Operation/GaussianBlur","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur"},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur"},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply"},{"html_id":"Crystal Image/CrImage/Operation/Pad","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad"},{"html_id":"Crystal Image/CrImage/Operation/Rotate","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate"},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur"}],"extended_modules":[{"html_id":"Crystal Image/CrImage/Format/Open","kind":"module","full_name":"CrImage::Format::Open","name":"Open"}],"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"An image in Grayscale. These image types are the easiest to perform feature and information extraction from, where\nthere is only one channel to examine, and so has methods for constructing `Mask`s from (see `#threshold` below).\n\nAn `RGBAImage` would become a `GrayscaleImage` this way:\n```\nimage.to_gray\n```\n\n\"Woman\n\"Woman","summary":"
An image in Grayscale.
","constructors":[{"html_id":"from_jpeg(image_data:Bytes):self-class-method","name":"from_jpeg","doc":"Read `image_data` as JPEG encoded bytes","summary":"
Read image_data as JPEG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_jpeg","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"handle = LibJPEGTurbo.init_decompress\ncheck_jpeg(handle, LibJPEGTurbo.decompress_header3(handle, image_data, image_data.size, out width, out height, out _subsampling, out _colorspace))\nbuffer = Bytes.new((width * height) * 3, 0)\ncheck_jpeg(handle, LibJPEGTurbo.decompress2(handle, image_data, LibC::ULong.new(image_data.size), buffer, width, 0, height, LibJPEGTurbo::PixelFormat::RGB, 0))\ncheck_jpeg(handle, LibJPEGTurbo.destroy(handle))\nred = Array.new(width * height) do\n  ChannelType::Red.default\nend\ngreen = Array.new(width * height) do\n  ChannelType::Green.default\nend\nblue = Array.new(width * height) do\n  ChannelType::Blue.default\nend\nalpha = Array.new(width * height) do\n  ChannelType::Alpha.default\nend\n(width * height).times do |index|\n  red.unsafe_put(index, buffer[index * 3])\n  green.unsafe_put(index, buffer[(index * 3) + 1])\n  blue.unsafe_put(index, buffer[(index * 3) + 2])\nend\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_jpeg(io:IO):self-class-method","name":"from_jpeg","doc":"Construct an Image from reading in bytes from `io`","summary":"
Construct an Image from reading in bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_jpeg","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_jpeg(io.getb_to_end)"}},{"html_id":"from_png(image_data:Bytes):self-class-method","name":"from_png","doc":"Read `image_data` and PNG encoded bytes","summary":"
Read image_data and PNG encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_png","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"ctx = LibSPNG.ctx_new(LibSPNG::CtxFlags::None)\nif ctx\nelse\n  raise(::CrImage::Exception.new(\"Failed to create a context\"))\nend\nLibSPNG.set_png_buffer(ctx, image_data, image_data.size)\ncheck_png(LibSPNG.get_ihdr(ctx, out ihdr))\ncheck_png(LibSPNG.decoded_image_size(ctx, LibSPNG::Format::RGBA8, out image_size))\nimage = Bytes.new(image_size.to_i, 0_u8)\ncheck_png(LibSPNG.decode_image(ctx, image, image_size, LibSPNG::Format::RGBA8, LibSPNG::DecodeFlags::None))\nLibSPNG.ctx_free(ctx)\nsize = image_size // 4\nwidth = size // ihdr.height\nheight = ihdr.height\nred = Array.new(size) do\n  0_u8\nend\ngreen = Array.new(size) do\n  0_u8\nend\nblue = Array.new(size) do\n  0_u8\nend\nalpha = Array.new(size) do\n  0_u8\nend\nsize.times do |index|\n  position = index * 4\n  red.unsafe_put(index, image[position + 0])\n  green.unsafe_put(index, image[position + 1])\n  blue.unsafe_put(index, image[position + 2])\n  alpha.unsafe_put(index, image[position + 3])\nend\nnew(red, green, blue, alpha, width.to_i, height.to_i)\n"}},{"html_id":"from_png(io:IO):self-class-method","name":"from_png","doc":"Construct an Image by reading bytes from `io`","summary":"
Construct an Image by reading bytes from io
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_png","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_png(io.getb_to_end)"}},{"html_id":"from_ppm(image_data:Bytes):self-class-method","name":"from_ppm","doc":"Read `image_data` as PPM encoded bytes","summary":"
Read image_data as PPM encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_ppm","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"from_ppm(IO::Memory.new(image_data))"}},{"html_id":"from_ppm(io:IO):self-class-method","name":"from_ppm","doc":"Read bytes from `io` as PPM encoded","summary":"
Read bytes from io as PPM encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_ppm","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"_magic_number = io.gets(\"\\n\", chomp: true)\nwidth = (io.gets(\" \", chomp: true)).try(&.to_i)\nheight = (io.gets(\"\\n\", chomp: true)).try(&.to_i)\n_maximum_color_value = io.gets(\"\\n\", chomp: true)\nif width && height\n  red = Array.new(width * height) do\n    ChannelType::Red.default\n  end\n  green = Array.new(width * height) do\n    ChannelType::Green.default\n  end\n  blue = Array.new(width * height) do\n    ChannelType::Blue.default\n  end\n  alpha = Array.new(width * height) do\n    ChannelType::Alpha.default\n  end\n  (width * height).times do |index|\n    red_byte = io.read_byte\n    green_byte = io.read_byte\n    blue_byte = io.read_byte\n    if (red_byte && green_byte) && blue_byte\n      red.unsafe_put(index, red_byte)\n      green.unsafe_put(index, green_byte)\n      blue.unsafe_put(index, blue_byte)\n    else\n      raise(\"The image ends prematurely\")\n    end\n  end\n  new(red, green, blue, alpha, width, height)\nelse\n  raise(\"The image doesn't have width or height\")\nend\n"}},{"html_id":"from_webp(image_data:Bytes):self-class-method","name":"from_webp","doc":"Read `image_data` as WebP encoded bytes","summary":"
Read image_data as WebP encoded bytes
","abstract":false,"args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"args_string":"(image_data : Bytes) : self","args_html":"(image_data : Bytes) : self","def":{"name":"from_webp","args":[{"name":"image_data","external_name":"image_data","restriction":"Bytes"}],"return_type":"self","visibility":"Public","body":"check_webp(LibWebP.get_info(image_data, image_data.size, out width, out height))\nbuffer = LibWebP.decode_rgba(image_data, image_data.size, pointerof(width), pointerof(height))\nred = Array.new(width * height) do\n  0_u8\nend\ngreen = Array.new(width * height) do\n  0_u8\nend\nblue = Array.new(width * height) do\n  0_u8\nend\nalpha = Array.new(width * height) do\n  0_u8\nend\n(width * height).times do |index|\n  position = index * 4\n  red.unsafe_put(index, buffer[position])\n  green.unsafe_put(index, buffer[position + 1])\n  blue.unsafe_put(index, buffer[position + 2])\n  alpha.unsafe_put(index, buffer[position + 3])\nend\nLibWebP.free(buffer)\nnew(red, green, blue, alpha, width, height)\n"}},{"html_id":"from_webp(io:IO):self-class-method","name":"from_webp","doc":"Read bytes from `io` as WebP encoded","summary":"
Read bytes from io as WebP encoded
","abstract":false,"args":[{"name":"io","external_name":"io","restriction":"IO"}],"args_string":"(io : IO) : self","args_html":"(io : IO) : self","def":{"name":"from_webp","args":[{"name":"io","external_name":"io","restriction":"IO"}],"return_type":"self","visibility":"Public","body":"from_webp(io.getb_to_end)"}},{"html_id":"new(red:Array(UInt8),green:Array(UInt8),blue:Array(UInt8),alpha:Array(UInt8),width:Int32,height:Int32)-class-method","name":"new","doc":"Create a GrayscaleImage from a set of color channels (delegates to `RGBAImage#to_gray`)","summary":"
Create a GrayscaleImage from a set of color channels (delegates to RGBAImage#to_gray)
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Create a GrayscaleImage with only an Array(UInt8) (alpha channel initialized as 255 throughout)
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Run provided block with the ChannelType::Gray channels and channel types.
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Invert grayscale pixels (replace each pixel will 255 - p for all p in @gray).
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Construct a Mask identify all pixels larger than or equal to num.
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Crop the map, returning only the values in column at xstart
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Get element at index, or nil if out of bounds
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Get a single dimensional Map representing teh column at x
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Perform a brute force cross correlation calculation with provided template.
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Perform a Fast Fourier Transform cross correlation (convolution?) with provided template.
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Performe a Fast Fourier Transform, padding out this Map so dimensions are a power of 2.
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Construct a Mask from this GrayscaleImage using the passed in block to determine if a given pixel should be true or not
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Return the maximum value in this Map
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Return the minimum value in this Map
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Pad the borders of this Map corresponding to pad_type.
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Return the raw array underlying the map
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Size of the map - width * height
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Return the sum of all values in this Map
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Receive a copy of the underlying #raw array.
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Convert this Map to a ComplexMap
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Convert this Map to a GrayscaleImage.
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Mask is a wrapper around BitArray, where each flag represents a boolean bit of information about a pixel from an image.
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Construct a new Mask of width x height, preset to initial
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Construct a new Mask from an integer (useful for testing or small mask construction)
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Construct a new Mask from the dimensions of passed in image with an initial bit
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Construct a new Mask with a set width and bits from #bits
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Construct a new Mask of width x height using &block to determine if a bit should be true or not (passed in x and y coordinates)
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Construct a new Mask from an array of BitArray.
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at x and y
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Return a new BitArray corresponding to the partial row specified
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Return an Array(BitArray) for the partial box (of partial rows and partial columns) of this mask.
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Return the bit at index
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Set the bit for coordinate x and y
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Set the bits for partial row xs at column y
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Set the bits for row x and partial columns ys
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Closing operator
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Dilation operator
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Dilation operator
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Erosion operator
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Erosion operator
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Invert all bits in this instance of Mask.
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Opening operator
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Opening operator
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Returns the bounding box of the mask where all true bits are contained.
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Return an array of Masks, each one corresponding to an area of contiguous true bits (identified from flood fills).
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Set the bit for coordinate x and y
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How many bits are stored in this Mask
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","abstract":false,"args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"args_string":"(width : Int32, height : Int32) : self","args_html":"(width : Int32, height : Int32) : self","location":{"filename":"src/cr-image/operation/bilinear_resize.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/bilinear_resize.cr#L21"},"def":{"name":"bilinear_resize!","args":[{"name":"width","external_name":"width","restriction":"Int32"},{"name":"height","external_name":"height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"x_ratio = width > 1 ? (@width - 1) / (width - 1) : 0\ny_ratio = height > 1 ? (@height - 1) / (height - 1) : 0\neach_channel do |channel, channel_type|\n  resized_channel = Array.new(width * height) do\n    0_u8\n  end\n  height.times do |h|\n    width.times do |w|\n      x = w * x_ratio\n      y = h * y_ratio\n      x_ceil = Math.min(@width - 1, x.ceil.to_i)\n      x_floor = x.floor.to_i\n      y_ceil = Math.min(@height - 1, y.ceil.to_i)\n      y_floor = y.floor.to_i\n      value = case\n      when (x_ceil == x_floor) && (y_ceil == y_floor)\n        x_index = x.to_i\n        y_index = y.to_i\n        channel.unsafe_fetch((@width * y_index) + x_index)\n      when x_ceil == x_floor\n        x_index = x.to_i\n        q_1 = channel.unsafe_fetch((@width * y_ceil) + x_index)\n        q_2 = channel.unsafe_fetch((@width * y_floor) + x_index)\n        ((q_2 * (y_ceil - y)) + (q_1 * (y - y_floor))).to_u8\n      when y_ceil == y_floor\n        y_index = y.to_i\n        q_1 = channel.unsafe_fetch((@width * y_index) + x_ceil)\n        q_2 = channel.unsafe_fetch((@width * y_index) + x_floor)\n        ((q_2 * (x_ceil - x)) + (q_1 * (x - x_floor))).to_u8\n      else\n        v_1 = channel.unsafe_fetch((@width * y_floor) + x_floor)\n        v_2 = channel.unsafe_fetch((@width * y_floor) + x_ceil)\n        v_3 = channel.unsafe_fetch((@width * y_ceil) + x_floor)\n        v_4 = channel.unsafe_fetch((@width * y_ceil) + x_ceil)\n        q_1 = (v_1 * (x_ceil - x)) + (v_2 * (x - x_floor))\n        q_2 = (v_3 * (x_ceil - x)) + (v_4 * (x - x_floor))\n        ((q_1 * (y_ceil - y)) + (q_2 * (y - y_floor))).to_u8\n      end\n      resized_channel.unsafe_put((width * h) + w, value)\n    end\n  end\n  self[channel_type] = resized_channel\nend\n@width = width\n@height = height\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/BoxBlur","path":"CrImage/Operation/BoxBlur.html","kind":"module","full_name":"CrImage::Operation::BoxBlur","name":"BoxBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/box_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/box_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blurs the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.box_blur(1).save(\"blurred_1_sample.jpg\")\nimage.box_blur(5).save(\"blurred_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blurs the image
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Brightens an image (increases white value)
","instance_methods":[{"html_id":"brightness(value:Float64):self-instance-method","name":"brightness","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/brightness.cr#L12"},"def":{"name":"brightness","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.brightness!(value)"}},{"html_id":"brightness!(value:Float64):self-instance-method","name":"brightness!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/brightness.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/brightness.cr#L16"},"def":{"name":"brightness!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"each_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, (    (channel.unsafe_fetch(index)) * value))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/ChannelSwap","path":"CrImage/Operation/ChannelSwap.html","kind":"module","full_name":"CrImage::Operation::ChannelSwap","name":"ChannelSwap","abstract":false,"locations":[{"filename":"src/cr-image/operation/channel_swap.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Swaps channels of `ChannelType` supported by an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.channel_swap(:green, :red) # Crystal autocasting of symbols to Pluto::ChannelType enum is magic\n```\n\"Channel","summary":"
Swaps channels of ChannelType supported by an image
","instance_methods":[{"html_id":"channel_swap(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L12"},"def":{"name":"channel_swap","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"clone.channel_swap!(a, b)"}},{"html_id":"channel_swap!(a:ChannelType,b:ChannelType):self-instance-method","name":"channel_swap!","abstract":false,"args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"args_string":"(a : ChannelType, b : ChannelType) : self","args_html":"(a : ChannelType, b : ChannelType) : self","location":{"filename":"src/cr-image/operation/channel_swap.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/channel_swap.cr#L16"},"def":{"name":"channel_swap!","args":[{"name":"a","external_name":"a","restriction":"ChannelType"},{"name":"b","external_name":"b","restriction":"ChannelType"}],"return_type":"self","visibility":"Public","body":"ch_a, ch_b = self[a], self[b]\nself[a] = ch_b\nself[b] = ch_a\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Contrast","path":"CrImage/Operation/Contrast.html","kind":"module","full_name":"CrImage::Operation::Contrast","name":"Contrast","abstract":false,"locations":[{"filename":"src/cr-image/operation/contrast.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L11"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Increases contrast of an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.contrast(20)\n```\n\"Contrasted","summary":"
Increases contrast of an image
","instance_methods":[{"html_id":"contrast(value:Float64):self-instance-method","name":"contrast","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":12,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L12"},"def":{"name":"contrast","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"clone.contrast!(value)"}},{"html_id":"contrast!(value:Float64):self-instance-method","name":"contrast!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Float64"}],"args_string":"(value : Float64) : self","args_html":"(value : Float64) : self","location":{"filename":"src/cr-image/operation/contrast.cr","line_number":16,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/contrast.cr#L16"},"def":{"name":"contrast!","args":[{"name":"value","external_name":"value","restriction":"Float64"}],"return_type":"self","visibility":"Public","body":"factor = (259 * (value + 255)) / (255 * (259 - value))\neach_color_channel do |channel|\n  size.times do |index|\n    channel.unsafe_put(index, (Math.min(255, Math.max(0, (factor * ((channel.unsafe_fetch(index)).to_i - 128)) + 128))).to_u8)\n  end\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Crop","path":"CrImage/Operation/Crop.html","kind":"module","full_name":"CrImage::Operation::Crop","name":"Crop","abstract":false,"locations":[{"filename":"src/cr-image/operation/crop.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Crops an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\n# These calls are equivalent\nimage.crop(40, 30, 80, 80)\nimage[40...120, 30...110]\n```\n\"Cropped","summary":"
Crops an image
","instance_methods":[{"html_id":"[](xrange:Range,yrange:Range):self-instance-method","name":"[]","abstract":false,"args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"args_string":"(xrange : Range, yrange : Range) : self","args_html":"(xrange : Range, yrange : Range) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L22"},"def":{"name":"[]","args":[{"name":"xrange","external_name":"xrange","restriction":"Range"},{"name":"yrange","external_name":"yrange","restriction":"Range"}],"return_type":"self","visibility":"Public","body":"xstart, xcount = resolve_to_start_and_count(xrange, width)\nystart, ycount = resolve_to_start_and_count(yrange, height)\ncrop(xstart, ystart, xcount, ycount)\n"}},{"html_id":"crop(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L18"},"def":{"name":"crop","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.crop!(x, y, new_width, new_height)"}},{"html_id":"crop(region:Region):self-instance-method","name":"crop","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L14"},"def":{"name":"crop","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop(*region.to_tuple)"}},{"html_id":"crop!(x:Int32,y:Int32,new_width:Int32,new_height:Int32):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"args_string":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","args_html":"(x : Int32, y : Int32, new_width : Int32, new_height : Int32) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":32,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L32"},"def":{"name":"crop!","args":[{"name":"x","external_name":"x","restriction":"Int32"},{"name":"y","external_name":"y","restriction":"Int32"},{"name":"new_width","external_name":"new_width","restriction":"Int32"},{"name":"new_height","external_name":"new_height","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"each_channel do |channel, channel_type|\n  self[channel_type] = (UInt8Map.new(width, channel))[x, new_width, y, new_height].raw\nend\n@width = new_width\n@height = new_height\nself\n"}},{"html_id":"crop!(region:Region):self-instance-method","name":"crop!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"}],"args_string":"(region : Region) : self","args_html":"(region : Region) : self","location":{"filename":"src/cr-image/operation/crop.cr","line_number":28,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/crop.cr#L28"},"def":{"name":"crop!","args":[{"name":"region","external_name":"region","restriction":"Region"}],"return_type":"self","visibility":"Public","body":"crop!(*region.to_tuple)"}}]},{"html_id":"Crystal Image/CrImage/Operation/Draw","path":"CrImage/Operation/Draw.html","kind":"module","full_name":"CrImage::Operation::Draw","name":"Draw","abstract":false,"locations":[{"filename":"src/cr-image/operation/draw.cr","line_number":17,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L17"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Draws shapes in the image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.draw_square(40, 30, 80, 80, CrImage::Color.of(\"#00f\"))\nimage.draw_circle(80, 70, 40, CrImage::Color.of(\"#00f\"))\nimage.draw_line(50, 50, 70, 90, CrImage::Color.of(\"#0f0\"))\n```\n\"Woman\n\"Woman\n\"Woman\n\nCan also use the `fill: true` parameter to fill in the drawn shapes","summary":"
Draws shapes in the image
","instance_methods":[{"html_id":"draw_circle(x:Int,y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle centered at x, y with radius","summary":"
Draw a circle centered at x, y with radius
","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":59,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L59"},"def":{"name":"draw_circle","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(x, y, radius, color, fill: fill)"}},{"html_id":"draw_circle(region:Region,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":54,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L54"},"def":{"name":"draw_circle","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":3,"return_type":"self","visibility":"Public","body":"clone.draw_circle!(*region.center, radius, color, fill: fill)"}},{"html_id":"draw_circle!(center_x:Int,center_y:Int,radius:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_circle!","abstract":false,"args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","args_html":"(center_x : Int, center_y : Int, radius : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":68,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L68"},"def":{"name":"draw_circle!","args":[{"name":"center_x","external_name":"center_x","restriction":"Int"},{"name":"center_y","external_name":"center_y","restriction":"Int"},{"name":"radius","external_name":"radius","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":4,"return_type":"self","visibility":"Public","body":"min_x = Math.max(0, center_x - radius)\nmax_x = Math.min(width - 1, center_x + radius)\nmax_y = Math.min(height - 1, center_y + radius)\neach_color_channel do |channel, channel_type|\n  0.upto(radius) do |y|\n    theta_0 = Math.asin((Math.max(0, (    y - 1))) / radius.to_f)\n    theta_1 = Math.asin(y / radius.to_f)\n    x_0 = (radius * (Math.cos(theta_0))).round\n    x_1 = (radius * (Math.cos(theta_1))).round\n    lower_x_outer = (Math.max(min_x, center_x - x_0)).to_i\n    lower_x_inner = (Math.max(min_x, center_x - x_1)).to_i\n    upper_x_outer = (Math.min(max_x, center_x + x_0)).to_i\n    upper_x_inner = (Math.min(max_x, center_x + x_1)).to_i\n    lower_y = center_y - y\n    upper_y = center_y + y\n    lower_y_outside_of_image = (center_y - y) < 0 || (center_y - y) > max_y\n    upper_y_outside_of_image = (center_y + y) < 0 || (center_y + y) > max_y\n    left_outer_x_beyond_right_of_image = (center_x - x_0) > max_x\n    right_outer_x_beyond_left_of_image = (center_x + x_0) < 0\n    left_inner_x_beyond_left_of_image = (center_x - x_1) < 0\n    right_inner_x_beyond_right_of_image = (center_x + x_1) > max_x\n    if fill\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_outer_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (upper_x_outer - lower_x_outer) + 1] = Array(UInt8).new((upper_x_outer - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n    else\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, lower_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || lower_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, lower_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n      if (left_inner_x_beyond_left_of_image || left_outer_x_beyond_right_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(lower_x_outer, upper_y), (lower_x_inner - lower_x_outer) + 1] = Array(UInt8).new((lower_x_inner - lower_x_outer) + 1) do\n          color[channel_type]\n        end\n      end\n      if (right_inner_x_beyond_right_of_image || right_outer_x_beyond_left_of_image) || upper_y_outside_of_image\n      else\n        channel[index_of(upper_x_inner, upper_y), (upper_x_outer - upper_x_inner) + 1] = Array(UInt8).new((upper_x_outer - upper_x_inner) + 1) do\n          color[channel_type]\n        end\n      end\n    end\n  end\nend\nself\n"}},{"html_id":"draw_circle!(region:Region,color:Color,*,fill:Bool=false,radius:Int32|Nil=nil):self-instance-method","name":"draw_circle!","doc":"Draw a circle around the region's center (see `Region#center`)","summary":"
Draw a circle around the region's center (see Region#center)
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Implementation of http://www.edepot.com/linec.html
","abstract":false,"args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","args_html":"(x1 : Int32, y1 : Int32, x2 : Int32, y2 : Int32, color : Color) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":139,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L139"},"def":{"name":"draw_line!","args":[{"name":"x1","external_name":"x1","restriction":"Int32"},{"name":"y1","external_name":"y1","restriction":"Int32"},{"name":"x2","external_name":"x2","restriction":"Int32"},{"name":"y2","external_name":"y2","restriction":"Int32"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"if (0 <= x1 && x1 < width) && (0 <= y1 && y1 < height)\nelse\n  raise(Exception.new(\"First point (#{x1},#{y1}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nif (0 <= x2 && x2 < width) && (0 <= y2 && y2 < height)\nelse\n  raise(Exception.new(\"Second point (#{x2},#{y2}) lies outside of the available drawing window (#{width}x#{height})\"))\nend\nrise_by_height = false\nshort = y2 - y1\nlong = x2 - x1\nif short.abs > long.abs\n  short, long = long, short\n  rise_by_height = true\nend\nend_val = long\ngradient = long == 0 ? short : short / long.abs.to_f\nif rise_by_height\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + jump.to_i, y1 + i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nelse\n  each_color_channel do |channel, channel_type|\n    jump = 0.0\n    0.to(end_val) do |i|\n      channel[index_of(x1 + i, y1 + jump.to_i)] = color[channel_type]\n      jump = jump + gradient\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : 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fill)"}},{"html_id":"draw_square(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L18"},"def":{"name":"draw_square","args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":2,"return_type":"self","visibility":"Public","body":"clone.draw_square!(region, color, fill: fill)"}},{"html_id":"draw_square!(x:Int,y:Int,box_width:Int,box_height:Int,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","args_html":"(x : Int, y : Int, box_width : Int, box_height : Int, color : Color, *, fill : Bool = false) : self","location":{"filename":"src/cr-image/operation/draw.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/draw.cr#L30"},"def":{"name":"draw_square!","args":[{"name":"x","external_name":"x","restriction":"Int"},{"name":"y","external_name":"y","restriction":"Int"},{"name":"box_width","external_name":"box_width","restriction":"Int"},{"name":"box_height","external_name":"box_height","restriction":"Int"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"splat_index":5,"return_type":"self","visibility":"Public","body":"if (x + box_width) > width\n  raise(\"Box dimensions extend #{((x + box_width) - width) + 1} pixels beyond width of the image (#{width})\")\nend\nif (y + box_height) > height\n  raise(\"Box dimensions extend #{((y + box_height) - height) + 1} pixels beyond height of the image (#{height})\")\nend\nx_i = x.to_i\ny_i = y.to_i\neach_color_channel do |channel, channel_type|\n  channel[(  (y_i * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  channel[((y_i + box_height) * width) + x_i, box_width] = Array(UInt8).new(box_width) do\n    color[channel_type]\n  end\n  box_height.times do |i|\n    if i == 0\n      next\n    end\n    if fill\n      channel[(      ((y_i + i) * width) + x_i), box_width] = Array(UInt8).new(box_width) do\n        color[channel_type]\n      end\n    else\n      channel.unsafe_put(((y_i + i) * width) + x_i, color[channel_type])\n      channel.unsafe_put(((((y_i + i) * width) + x_i) + box_width) - 1, color[channel_type])\n    end\n  end\nend\nself\n"}},{"html_id":"draw_square!(region:Region,color:Color,*,fill:Bool=false):self-instance-method","name":"draw_square!","abstract":false,"args":[{"name":"region","external_name":"region","restriction":"Region"},{"name":"color","external_name":"color","restriction":"Color"},{"name":"","external_name":"","restriction":""},{"name":"fill","default_value":"false","external_name":"fill","restriction":"Bool"}],"args_string":"(region : Region, color : Color, *, fill : Bool = false) : self","args_html":"(region : Region, color : Color, *, fill : Bool = false) : 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Image/CrImage/Operation/GaussianBlur","path":"CrImage/Operation/GaussianBlur.html","kind":"module","full_name":"CrImage::Operation::GaussianBlur","name":"GaussianBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Applies a 3x3 Gaussian blur. Implementation derived from [here](https://blog.ivank.net/fastest-gaussian-blur.html)\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.gaussian_blur(1).save(\"gaussian_1_sample.jpg\")\nimage.gaussian_blur(5).save(\"gaussian_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Applies a 3x3 Gaussian blur.
","instance_methods":[{"html_id":"gaussian_blur(sigma:Int32):self-instance-method","name":"gaussian_blur","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L14"},"def":{"name":"gaussian_blur","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.gaussian_blur!(sigma)"}},{"html_id":"gaussian_blur!(sigma:Int32):self-instance-method","name":"gaussian_blur!","abstract":false,"args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"args_string":"(sigma : Int32) : self","args_html":"(sigma : Int32) : self","location":{"filename":"src/cr-image/operation/gaussian_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/gaussian_blur.cr#L18"},"def":{"name":"gaussian_blur!","args":[{"name":"sigma","external_name":"sigma","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"n = 3\nw_ideal = Math.sqrt((((12 * sigma) * sigma) / n) + 1)\nw_l = w_ideal.floor.to_i\nif (w_l % 2) == 0\n  w_l = w_l - 1\nend\nm_ideal = (((((12 * sigma) * sigma) - ((n * w_l) * w_l)) - ((4 * n) * w_l)) - (3 * n)) / ((-4 * w_l) - 4)\nm = m_ideal.round\nsizes = [] of Int32\nn.times do |i|\n  sizes << (if i < m\n    w_l\n  else\n    w_l + 2\n  end)\nend\nbox_blur!(((sizes.unsafe_fetch(0)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(1)) - 1) // 2)\nbox_blur!(((sizes.unsafe_fetch(2)) - 1) // 2)\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","path":"CrImage/Operation/HistogramEqualize.html","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize","abstract":false,"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":19,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L19"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Provides methods for histogram and histogram equalization. Follows method outlined [here](https://www.sci.utah.edu/~acoste/uou/Image/project1/Arthur_COSTE_Project_1_report.html)\n\nIf an image is particularly dark or particularly bright with low contrast, the `Operation::Contrast#contrast` method will only\nmake the image darker or lighter. For images like these, equalizing the image along its histogram will produce better results.\n\n\"A\n\n```\nimage.contrast(10).save(\"contrast.jpg\")\nimage.histogram_equalize.save(\"equalized.jpg\")\n```\n\"Darker\n\"A\n\nThis method does not work well when a given method has a bimodal distribution of color pixels. For example:\n\n\"Woman\n\"Highly","summary":"
Provides methods for histogram and histogram equalization.
","instance_methods":[{"html_id":"histogram(channel_type:ChannelType):Histogram-instance-method","name":"histogram","abstract":false,"args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(channel_type : ChannelType) : Histogram","args_html":"(channel_type : ChannelType) : Histogram","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":107,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L107"},"def":{"name":"histogram","args":[{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"return_type":"Histogram","visibility":"Public","body":"Histogram.new(self, channel_type)"}},{"html_id":"histogram_equalize:self-instance-method","name":"histogram_equalize","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":111,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L111"},"def":{"name":"histogram_equalize","return_type":"self","visibility":"Public","body":"clone.histogram_equalize!"}},{"html_id":"histogram_equalize!:self-instance-method","name":"histogram_equalize!","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":115,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L115"},"def":{"name":"histogram_equalize!","return_type":"self","visibility":"Public","body":"each_color_channel do |channel, channel_type|\n  if channel_type.alpha?\n    next\n  end\n  remap = (histogram(channel_type)).equalize\n  size.times do |i|\n    channel.unsafe_put(i, remap[channel.unsafe_fetch(i)])\n  end\nend\nself\n"}}],"types":[{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize/Histogram","path":"CrImage/Operation/HistogramEqualize/Histogram.html","kind":"class","full_name":"CrImage::Operation::HistogramEqualize::Histogram","name":"Histogram","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/operation/histogram.cr","line_number":21,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L21"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage/Operation/HistogramEqualize","kind":"module","full_name":"CrImage::Operation::HistogramEqualize","name":"HistogramEqualize"},"doc":"A histogram of an `Image` for a specific `ChannelType`","summary":"
A histogram of an Image for a specific ChannelType
","constructors":[{"html_id":"new(image:Image,channel_type:ChannelType)-class-method","name":"new","abstract":false,"args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"args_string":"(image : Image, channel_type : ChannelType)","args_html":"(image : Image, channel_type : ChannelType)","location":{"filename":"src/cr-image/operation/histogram.cr","line_number":24,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L24"},"def":{"name":"new","args":[{"name":"image","external_name":"image","restriction":"Image"},{"name":"channel_type","external_name":"channel_type","restriction":"ChannelType"}],"visibility":"Public","body":"_ = allocate\n_.initialize(image, channel_type)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"cdf:Hash(UInt8,Float64)-instance-method","name":"cdf","doc":"Get the cumulative distribution for the image's histogram","summary":"
Get the cumulative distribution for the image's histogram
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":56,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L56"},"def":{"name":"cdf","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"total = 0_f64\n@cumulative_distribution_histogram || (@cumulative_distribution_histogram = normalize.map do |pixel, probability|\n  original = total\n  total = total + probability\n  {pixel, original}\nend.to_h)\n"}},{"html_id":"channel_type:CrImage::ChannelType-instance-method","name":"channel_type","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"channel_type","visibility":"Public","body":"@channel_type"}},{"html_id":"counts:Hash(UInt8,Int32)-instance-method","name":"counts","doc":"Get the raw counts for a given pixel value (0-255) in the image","summary":"
Get the raw counts for a given pixel value (0-255) in the image
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":30,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L30"},"def":{"name":"counts","return_type":"Hash(UInt8, Int32)","visibility":"Public","body":"@internal_hist || (@internal_hist = calculate_counts)"}},{"html_id":"equalize:Hash(UInt8,UInt8)-instance-method","name":"equalize","doc":"Remap the cumalitive distribution of pixels to get a new, more spread out pixel value","summary":"
Remap the cumalitive distribution of pixels to get a new, more spread out pixel value
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L66"},"def":{"name":"equalize","return_type":"Hash(UInt8, UInt8)","visibility":"Public","body":"cdf.map do |pixel, cumalative|\n  {pixel, ((cumalative * 255).clamp(0, 255)).to_u8}\nend.to_h"}},{"html_id":"image:CrImage::Image-instance-method","name":"image","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":22,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L22"},"def":{"name":"image","visibility":"Public","body":"@image"}},{"html_id":"mean:Float64-instance-method","name":"mean","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":74,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L74"},"def":{"name":"mean","return_type":"Float64","visibility":"Public","body":"@mean || (@mean = counts.sum do |pixel, count|\n  pixel.to_i64 * count\nend.to_f64 / @image.size)"}},{"html_id":"normalize:Hash(UInt8,Float64)-instance-method","name":"normalize","doc":"Get pixel counts normalized - all values between 0.0 and 1.0","summary":"
Get pixel counts normalized - all values between 0.0 and 1.0
","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":47,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L47"},"def":{"name":"normalize","return_type":"Hash(UInt8, Float64)","visibility":"Public","body":"counts.map do |pixel, count|\n  {pixel, count.to_f / @image.size}\nend.to_h"}},{"html_id":"std_dev:Float64-instance-method","name":"std_dev","abstract":false,"location":{"filename":"src/cr-image/operation/histogram.cr","line_number":80,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/histogram.cr#L80"},"def":{"name":"std_dev","return_type":"Float64","visibility":"Public","body":"@std_dev || (@std_dev = Math.sqrt(counts.sum do |value, count|\n  count * ((value.to_i64 - mean) ** 2)\nend.to_f64 / @image.size))"}}]}]},{"html_id":"Crystal Image/CrImage/Operation/HorizontalBlur","path":"CrImage/Operation/HorizontalBlur.html","kind":"module","full_name":"CrImage::Operation::HorizontalBlur","name":"HorizontalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the horizontal axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.horizontal_blur(1).save(\"horizontal_1_sample.jpg\")\nimage.horizontal_blur(5).save(\"horizontal_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the horizontal axis
","instance_methods":[{"html_id":"horizontal_blur(k:Int32):self-instance-method","name":"horizontal_blur","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L14"},"def":{"name":"horizontal_blur","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.horizontal_blur!(k)"}},{"html_id":"horizontal_blur!(k:Int32):self-instance-method","name":"horizontal_blur!","abstract":false,"args":[{"name":"k","external_name":"k","restriction":"Int32"}],"args_string":"(k : Int32) : self","args_html":"(k : Int32) : self","location":{"filename":"src/cr-image/operation/horizontal_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/horizontal_blur.cr#L18"},"def":{"name":"horizontal_blur!","args":[{"name":"k","external_name":"k","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((k + k) + 1)\neach_color_channel do |channel|\n  @height.times do |y|\n    center_index : Int32 = y * @width\n    left__bound : Int32 = center_index\n    right_bound : Int32 = center_index + k\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last__value : Int32 = (channel.unsafe_fetch((center_index + @width) - 1)).to_i\n    current_sum : Int32 = (k + 1) * first_value\n    (0..(k - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + i))\n    end\n    (0..k).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      center_index = center_index + 1\n    end\n    ((k + 1)..((@width - k) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + 1\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n    ((@width - k)..(@width - 1)).each do\n      current_sum = current_sum + (last__value - (channel.unsafe_fetch(left__bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left__bound = left__bound + 1\n      center_index = center_index + 1\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/MaskApply","path":"CrImage/Operation/MaskApply.html","kind":"module","full_name":"CrImage::Operation::MaskApply","name":"MaskApply","abstract":false,"locations":[{"filename":"src/cr-image/operation/mask_apply.cr","line_number":27,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L27"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Apply a mask to an image\n\nTaking sample `image`:\n\n\"Woman\n\nAnd mask\n\n\"Black\n\n```\nmask = CrImage::Mask.new(image, false)\nmask[50..90, 65..75] = true\nmask.to_gray.save(\"apply_mask_mask.jpg\")\n\nimage.apply(mask).save(\"apply_mask.jpg\")\n\nimage.apply_color(mask, CrImage::Color.of(\"#00f\")).save(\"apply_mask_color.jpg\")\n\nimage.apply(mask) do |pixel, channel_type, x, y|\n  Math.min(255, pixel + 50).to_u8 if channel_type.blue?\nend.save(\"apply_mask_block.jpg\")\n```\n\"Image\n\"Thin\n\"Thin","summary":"
Apply a mask to an image
","instance_methods":[{"html_id":"apply(mask:Mask):self-instance-method","name":"apply","doc":"Black out all pixels but those found in the mask","summary":"
Black out all pixels but those found in the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":29,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L29"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"clone.apply!(mask)"}},{"html_id":"apply(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply","doc":"Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.\n\nDoes not change values not matched by the mask","summary":"
Apply block to all pixels that match mask, replacing pixel value if block returns non-nil value.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":36,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L36"},"def":{"name":"apply","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"clone.apply!(mask, &block)"}},{"html_id":"apply!(mask:Mask):self-instance-method","name":"apply!","doc":"TODO: add apply version that accepts 1+ ChannelType that the mask should apply to (i.e. make a background completely transparent, not just transparent black)","summary":"
TODO  add apply version that accepts 1+ ChannelType that the mask should apply to (i.e.
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask) : self","args_html":"(mask : Mask) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":46,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L46"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? pixel : 0_u8\n  end\nend\nself\n"}},{"html_id":"apply!(mask:Mask,&block:UInt8,ChannelType,Int32,Int32->UInt8|Nil):self-instance-method","name":"apply!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"args_string":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","args_html":"(mask : Mask, &block : UInt8, ChannelType, Int32, Int32 -> UInt8 | Nil) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L55"},"def":{"name":"apply!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"}],"yields":4,"block_arity":4,"block_arg":{"name":"block","external_name":"block","restriction":"(UInt8, ChannelType, Int32, Int32 -> UInt8 | ::Nil)"},"return_type":"self","visibility":"Public","body":"if (mask.width == width) && (mask.height == height)\nelse\n  raise(\"Mask of #{mask.width}x#{mask.height} doesn't match image dimensions #{width}x#{height}\")\nend\neach_channel do |channel, channel_type|\n  channel.map_with_index! do |pixel, i|\n    mask.at(i) ? (block.call(pixel, channel_type, i % width, i // width)) || pixel : pixel\n  end\nend\nself\n"}},{"html_id":"apply_color(mask:Mask,color:Color):self-instance-method","name":"apply_color","doc":"Change the color of all pixels that match the mask","summary":"
Change the color of all pixels that match the mask
","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":41,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L41"},"def":{"name":"apply_color","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"clone.apply_color!(mask, color)"}},{"html_id":"apply_color!(mask:Mask,color:Color):self-instance-method","name":"apply_color!","abstract":false,"args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"args_string":"(mask : Mask, color : Color) : self","args_html":"(mask : Mask, color : Color) : self","location":{"filename":"src/cr-image/operation/mask_apply.cr","line_number":66,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/mask_apply.cr#L66"},"def":{"name":"apply_color!","args":[{"name":"mask","external_name":"mask","restriction":"Mask"},{"name":"color","external_name":"color","restriction":"Color"}],"return_type":"self","visibility":"Public","body":"apply!(mask) do |_, channel_type|\n  color[channel_type]\nend"}}]},{"html_id":"Crystal Image/CrImage/Operation/Pad","path":"CrImage/Operation/Pad.html","kind":"module","full_name":"CrImage::Operation::Pad","name":"Pad","abstract":false,"locations":[{"filename":"src/cr-image/operation/pad.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Pads an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.pad(left: 50, right: 50)\nimage.pad(left: 50, right: 50, pad_type: CrImage::EdgePolicy::Repeat)\n```\n\"Picture\n\"Picture","summary":"
Pads an image
","instance_methods":[{"html_id":"pad(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L14"},"def":{"name":"pad","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.pad!(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type)"}},{"html_id":"pad!(all:Int32=0,*,top:Int32=0,bottom:Int32=0,left:Int32=0,right:Int32=0,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"pad!","abstract":false,"args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(all : Int32 = 0, *, top : Int32 = 0, bottom : Int32 = 0, left : Int32 = 0, right : Int32 = 0, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/pad.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/pad.cr#L18"},"def":{"name":"pad!","args":[{"name":"all","default_value":"0","external_name":"all","restriction":"Int32"},{"name":"","external_name":"","restriction":""},{"name":"top","default_value":"0","external_name":"top","restriction":"Int32"},{"name":"bottom","default_value":"0","external_name":"bottom","restriction":"Int32"},{"name":"left","default_value":"0","external_name":"left","restriction":"Int32"},{"name":"right","default_value":"0","external_name":"right","restriction":"Int32"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"orig_width = width\neach_channel do |channel, channel_type|\n  padded = (UInt8Map.new(orig_width, channel)).pad(all, top: top, bottom: bottom, left: left, right: right, pad_type: pad_type, pad_black_value: channel_type.default)\n  self[channel_type] = padded.raw\n  @width = padded.width\n  @height = padded.height\nend\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/Rotate","path":"CrImage/Operation/Rotate.html","kind":"module","full_name":"CrImage::Operation::Rotate","name":"Rotate","abstract":false,"locations":[{"filename":"src/cr-image/operation/rotate.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Rotates an image\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.rotate(45)\nimage.rotate(45, pad: true)\n```\n\"Rotated\n\"Rotated","summary":"
Rotates an image
","instance_methods":[{"html_id":"rotate(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate","doc":"Rotates an image by `degrees`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":20,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L20"},"def":{"name":"rotate","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"clone.rotate!(degrees, center_x: center_x, center_y: center_y, radius: radius, pad: pad, pad_type: pad_type)"}},{"html_id":"rotate!(degrees:Float64,*,center_x:Int32=width//2,center_y:Int32=height//2,radius:Int32=-1,pad:Bool=false,pad_type:EdgePolicy=EdgePolicy::Black):self-instance-method","name":"rotate!","doc":"Rotates an image by `degrees`. Modifies `self`\n\n`center_x` and `center_y` represents the point in the image that will be rotated around. Defaults to image center.\n`radius` can be used to only rotate a smaller circular region in the image. Can't be used with `pad`\n`pad` can be used to pad out the image so that corners that would normally be occluded, are visible.\n`pad_type` behaves the same as `pad_type` in `Pad`","summary":"
Rotates an image by degrees.
","abstract":false,"args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"args_string":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","args_html":"(degrees : Float64, *, center_x : Int32 = width // 2, center_y : Int32 = height // 2, radius : Int32 = -1, pad : Bool = false, pad_type : EdgePolicy = EdgePolicy::Black) : self","location":{"filename":"src/cr-image/operation/rotate.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/rotate.cr#L38"},"def":{"name":"rotate!","args":[{"name":"degrees","external_name":"degrees","restriction":"Float64"},{"name":"","external_name":"","restriction":""},{"name":"center_x","default_value":"width // 2","external_name":"center_x","restriction":"Int32"},{"name":"center_y","default_value":"height // 2","external_name":"center_y","restriction":"Int32"},{"name":"radius","default_value":"-1","external_name":"radius","restriction":"Int32"},{"name":"pad","default_value":"false","external_name":"pad","restriction":"Bool"},{"name":"pad_type","default_value":"EdgePolicy::Black","external_name":"pad_type","restriction":"EdgePolicy"}],"splat_index":1,"return_type":"self","visibility":"Public","body":"if pad_type.none?\n  raise(Exception.new(\"Edge policy None doesn't apply to rotation\"))\nend\nif pad && radius >= 0\n  raise(Exception.new(\"Can't pad image and limit rotation by radius\"))\nend\nradians = ((-Math::PI) * degrees) / 180\nsin = Math.sin(radians)\ncos = Math.cos(radians)\nradius_sq = radius * radius\nnew_width, new_size, out_center_x, out_center_y = output_dimensions(pad, degrees, center_x, center_y)\neach_channel do |channel, channel_type|\n  new_x = -1\n  new_y = 0\n  self[channel_type] = Array.new(new_size) do |i|\n    new_x = new_x + 1\n    if new_x == new_width\n      new_x = 0\n      new_y = new_y + 1\n    end\n    if radius >= 0 && (((new_x - center_x) ** 2) + ((new_y - center_y) ** 2)) > radius_sq\n      next channel.unsafe_fetch(i)\n    end\n    orig_x = (((cos * (new_x - out_center_x)) - (sin * (new_y - out_center_y))) + center_x).round.to_i\n    orig_y = (((sin * (new_x - out_center_x)) + (cos * (new_y - out_center_y))) + center_y).round.to_i\n    if pad_type.black?\n      if ((orig_x < 0 || orig_x >= width) || orig_y < 0) || orig_y >= height\n        next channel_type.default\n      end\n    else\n      orig_x = orig_x.clamp(0, width - 1)\n      orig_y = orig_y.clamp(0, height - 1)\n    end\n    channel.unsafe_fetch((orig_y * width) + orig_x)\n  end\nend\n@width = new_width\n@height = new_size // new_width\nself\n"}}]},{"html_id":"Crystal Image/CrImage/Operation/VerticalBlur","path":"CrImage/Operation/VerticalBlur.html","kind":"module","full_name":"CrImage::Operation::VerticalBlur","name":"VerticalBlur","abstract":false,"locations":[{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":13,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L13"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"including_types":[{"html_id":"Crystal Image/CrImage/GrayscaleImage","kind":"class","full_name":"CrImage::GrayscaleImage","name":"GrayscaleImage"},{"html_id":"Crystal Image/CrImage/RGBAImage","kind":"class","full_name":"CrImage::RGBAImage","name":"RGBAImage"}],"namespace":{"html_id":"Crystal Image/CrImage/Operation","kind":"module","full_name":"CrImage::Operation","name":"Operation"},"doc":"Blur an image along the vertical axis\n\nTaking sample `image`:\n\n\"Woman\n\n```\nimage.vertical_blur(1).save(\"vertical_1_sample.jpg\")\nimage.vertical_blur(5).save(\"vertical_5_sample.jpg\")\n```\n\"Blurred\n\"Blurred","summary":"
Blur an image along the vertical axis
","instance_methods":[{"html_id":"vertical_blur(value:Int32):self-instance-method","name":"vertical_blur","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":14,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L14"},"def":{"name":"vertical_blur","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"clone.vertical_blur!(value)"}},{"html_id":"vertical_blur!(value:Int32):self-instance-method","name":"vertical_blur!","abstract":false,"args":[{"name":"value","external_name":"value","restriction":"Int32"}],"args_string":"(value : Int32) : self","args_html":"(value : Int32) : self","location":{"filename":"src/cr-image/operation/vertical_blur.cr","line_number":18,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/operation/vertical_blur.cr#L18"},"def":{"name":"vertical_blur!","args":[{"name":"value","external_name":"value","restriction":"Int32"}],"return_type":"self","visibility":"Public","body":"buffer = Bytes.new(size, 0)\nmultiplier = 1 / ((value + value) + 1)\neach_color_channel do |channel|\n  @width.times do |x|\n    center_index : Int32 = x\n    left_bound : Int32 = center_index\n    right_bound : Int32 = center_index + (value * @width)\n    first_value : Int32 = (channel.unsafe_fetch(center_index)).to_i\n    last_value : Int32 = (channel.unsafe_fetch(center_index + (@width * (@height - 1)))).to_i\n    current_sum : Int32 = (value + 1) * first_value\n    (0..(value - 1)).each do |i|\n      current_sum = current_sum + (channel.unsafe_fetch(center_index + (i * @width)))\n    end\n    (0..value).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - first_value)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((value + 1)..((@height - value) - 1)).each do\n      current_sum = current_sum + ((channel.unsafe_fetch(right_bound)).to_i - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      right_bound = right_bound + @width\n      center_index = center_index + @width\n    end\n    ((@height - value)..(@height - 1)).each do\n      current_sum = current_sum + (last_value - (channel.unsafe_fetch(left_bound)).to_i)\n      buffer.unsafe_put(center_index, (current_sum * multiplier).to_u8)\n      left_bound = left_bound + @width\n      center_index = center_index + @width\n    end\n  end\n  (channel.@buffer).copy_from(buffer.to_unsafe, buffer.size)\nend\nself\n"}}]}]},{"html_id":"Crystal Image/CrImage/Region","path":"CrImage/Region.html","kind":"struct","full_name":"CrImage::Region","name":"Region","abstract":false,"superclass":{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},"ancestors":[{"html_id":"Crystal Image/Struct","kind":"struct","full_name":"Struct","name":"Struct"},{"html_id":"Crystal Image/Value","kind":"struct","full_name":"Value","name":"Value"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/CrImage","kind":"module","full_name":"CrImage","name":"CrImage"},"doc":"Represents a rectangular area on an `Image` from its upper left corner `x` and `y` coordinates, and a `width` and `height`.\n\nSee `Operation::Crop#crop` and `Operation::Draw#draw_square` for examples using it.","summary":"
Represents a rectangular area on an Image from its upper left corner #x and #y coordinates, and a #width and #height.
","constructors":[{"html_id":"center(x:UInt16,y:UInt16,width:UInt16,height:UInt16):Region-class-method","name":"center","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16) : Region","location":{"filename":"src/cr-image/region.cr","line_number":11,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L11"},"def":{"name":"center","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"return_type":"Region","visibility":"Public","body":"new(x - (width // 2), y - (height // 2), width, height)"}},{"html_id":"new(x:UInt16,y:UInt16,width:UInt16,height:UInt16)-class-method","name":"new","abstract":false,"args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"args_string":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","args_html":"(x : UInt16, y : UInt16, width : UInt16, height : UInt16)","location":{"filename":"src/cr-image/region.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/cr-image/region.cr#L5"},"def":{"name":"new","args":[{"name":"x","external_name":"x","restriction":"UInt16"},{"name":"y","external_name":"y","restriction":"UInt16"},{"name":"width","external_name":"width","restriction":"UInt16"},{"name":"height","external_name":"height","restriction":"UInt16"}],"visibility":"Public","body":"_ = allocate\n_.initialize(x, y, width, height)\nif _.responds_to?(:finalize)\n  ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"html_id":"center:Tuple(Int32,Int32)-instance-method","name":"center","doc":"Return the `{x, y}` tuple of the center coordinates of this `Region`","summary":"
Return the {x, y} tuple of the center coordinates of this Region
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Crop a provided Image with this region, using Operation::Crop#crop
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Read image_data as JPEG encoded bytes
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Construct an Image from reading in bytes from io
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Read image_data and PNG encoded bytes
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Construct an Image by reading bytes from io
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Read image_data as PPM encoded bytes
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Read bytes from io as PPM encoded
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Read image_data as WebP encoded bytes
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Read bytes from io as WebP encoded
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Con
","abstract":false,"location":{"filename":"src/pluto.cr","line_number":23,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/pluto.cr#L23"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"CrImage::RGBAImage.new(red.clone, green.clone, blue.clone, alpha.clone, width, height)"}}]}]},{"html_id":"Crystal Image/StumpyCore","path":"StumpyCore.html","kind":"module","full_name":"StumpyCore","name":"StumpyCore","abstract":false,"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":3,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/canvas.cr#L3"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba.cr","line_number":4,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba.cr#L4"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/css_constants.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_grayscale.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_hex.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_hsl_hsv.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_relative.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/from_rgba.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/rgba/mixing.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/rgba/mixing.cr#L1"},{"filename":"lib/stumpy_core/src/stumpy_core/utils.cr","line_number":1,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/utils.cr#L1"},{"filename":"src/stumpy.cr","line_number":5,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L5"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"A module owned by [StumpyCr](https://github.com/stumpycr/stumpy_core)","summary":"
A module owned by StumpyCr
","types":[{"html_id":"Crystal Image/StumpyCore/Canvas","path":"StumpyCore/Canvas.html","kind":"class","full_name":"StumpyCore::Canvas","name":"Canvas","abstract":false,"superclass":{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"Crystal Image/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"Crystal Image/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"lib/stumpy_core/src/stumpy_core/canvas.cr","line_number":31,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/lib/stumpy_core/src/stumpy_core/canvas.cr#L31"},{"filename":"src/stumpy.cr","line_number":6,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L6"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/StumpyCore","kind":"module","full_name":"StumpyCore","name":"StumpyCore"},"doc":"A canvas is 2D array of `RGBA` pixels\n\nTo create a canvas of size `400` x `200`\n\n```\ncanvas = StumpyCore::Canvas.new(400, 200)\n```\n\nThe default background color is transparent,\nbut it can be passed in as a parameter or as a block\nthat returns the color value for each `{x, y}` pair.\n\n```\ncanvas2 = StumpyCore::Canvas.new(400, 200, RGBA::WHITE)\n```\n\n```\ncanvas3 = StumpyCore::Canvas.new(256, 256) do |x, y|\n  RGBA.from_rgb_n(x, y, 255, 8)\nend\n```\n![image](https://github.com/stumpycr/stumpy_core/blob/feature/images/rainbow.png?raw=true)\n\nBecause of the way pixels are stored in a `Slice`,\n`Canvas`es are limited to `Int32::MAX = 2147483647` pixels in total,\ne.g. a maximal size of 46340x46340 for a square image.","summary":"
A canvas is 2D array of RGBA pixels
","instance_methods":[{"html_id":"to_crimage:CrImage::RGBAImage-instance-method","name":"to_crimage","abstract":false,"location":{"filename":"src/stumpy.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/stumpy.cr#L7"},"def":{"name":"to_crimage","return_type":"CrImage::RGBAImage","visibility":"Public","body":"size = width * height\nred = Array(UInt8).new(size)\ngreen = Array(UInt8).new(size)\nblue = Array(UInt8).new(size)\nalpha = Array(UInt8).new(size)\neach_row do |row|\n  row.each do |rgba|\n    red << (rgba.r >> 8).to_u8\n    green << (rgba.g >> 8).to_u8\n    blue << (rgba.b >> 8).to_u8\n    alpha << (rgba.a >> 8).to_u8\n  end\nend\nCrImage::RGBAImage.new(red, green, blue, alpha, width, height)\n"}}]}]},{"html_id":"Crystal Image/Tutorial","path":"Tutorial.html","kind":"module","full_name":"Tutorial","name":"Tutorial","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/chromakey_tutorial.cr#L35"},{"filename":"src/tutorials/tutorial.cr","line_number":7,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/tutorial.cr#L7"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"doc":"This fictional module exists to provide tutorials for using CrImage in the documentation\n\nSee:\n* `EdgeDetection`\n* `ChromaKey`\n* `FindDifferences`","summary":"
This fictional module exists to provide tutorials for using CrImage in the documentation
","types":[{"html_id":"Crystal Image/Tutorial/ChromaKey","path":"Tutorial/ChromaKey.html","kind":"module","full_name":"Tutorial::ChromaKey","name":"ChromaKey","abstract":false,"locations":[{"filename":"src/tutorials/chromakey_tutorial.cr","line_number":35,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/chromakey_tutorial.cr#L35"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can swap out the background by creating a mask representing the pixels that are close in color, and replacing them using an `MaskApply#apply_color` method.\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"sample.jpg\")\n\n# Grab a color from the background, for comparison\nbackground = image[10, 10]\n\n# Construct a mask of all pixels within a color distance of our background\nbackground_mask = image.mask_from do |color|\n  # 25 chosen through trial-and-error\n  color.dist(background) < 25\nend\n  .closing! # Remove small `true` regions\n  .opening! # Remove small `false` regions\n\n# Now make the background blue\nimage\n  .apply_color(background_mask, CrImage::Color.of(\"#0000cc\"))\n  .save(\"chromakey.jpg\")\n```\n\nResults in image:\n\n\"Background\n\nThis script ran on my machine in `4ms` in `--release` mode.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/EdgeDetection","path":"Tutorial/EdgeDetection.html","kind":"module","full_name":"Tutorial::EdgeDetection","name":"EdgeDetection","abstract":false,"locations":[{"filename":"src/tutorials/edge_detection_tutorial.cr","line_number":38,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/edge_detection_tutorial.cr#L38"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `sample.jpg` image:\n\n\"Woman\n\nWe can run the [Sobel Operator](https://en.wikipedia.org/wiki/Sobel_operator) to detect edges in it:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nvertical_sobel = CrImage::IntMap.new([\n  [-1, -2, -1],\n  [0, 0, 0],\n  [1, 2, 1],\n])\n\nhorizontal_sobel = CrImage::IntMap.new([\n  [-1, 0, 1],\n  [-2, 0, 2],\n  [-1, 0, 1],\n])\n\nimage = CrImage::GrayscaleImage.open(\"sample.jpg\")\n\ndx = image.cross_correlate(horizontal_sobel)\ndy = image.cross_correlate(vertical_sobel)\n\n(dx ** 2 + dy ** 2).to_gray(scale: true).save(\"edge_detection.jpg\")\n```\n\nResults in image:\n\n\"Black\n\nThis script ran on my machine in `11ms` in `--release` mode.\n\n**Note**: This tutorial is using `cross_correlate`. For large images (or medium-to-large operators), the `cross_correlate_fft` may perform better.","summary":"
Given sample.jpg image:
"},{"html_id":"Crystal Image/Tutorial/FindDifferences","path":"Tutorial/FindDifferences.html","kind":"module","full_name":"Tutorial::FindDifferences","name":"FindDifferences","abstract":false,"locations":[{"filename":"src/tutorials/find_differences.cr","line_number":55,"url":"https://github.com/Vici37/cr-image/blob/8d87c4608dd8d360bdcec0f512f3398afc189ac9/src/tutorials/find_differences.cr#L55"}],"repository_name":"Crystal Image","program":false,"enum":false,"alias":false,"const":false,"namespace":{"html_id":"Crystal Image/Tutorial","kind":"module","full_name":"Tutorial","name":"Tutorial"},"doc":"Given `differences.jpg` image:\n\n\"Two\n\nWe can programatically detect _most_ of the differences between these two images:\n\n```\nrequire \"cr-image\"\nrequire \"cr-image/jpeg\"\n\nimage = CrImage::RGBAImage.open(\"differences.jpg\")\nret = image.clone\n\n# Perform a blur to remove random noise\nimg1 = image.gaussian_blur(1)[2...340, ..]\nimg2 = image.gaussian_blur(1)[361...699, ..]\n\n# Convert each color channel into a IntMap\nred_img1 = CrImage::UInt8Map.new(img1.width, img1.red).to_i\ngre_img1 = CrImage::UInt8Map.new(img1.width, img1.green).to_i\nblu_img1 = CrImage::UInt8Map.new(img1.width, img1.blue).to_i\nred_img2 = CrImage::UInt8Map.new(img2.width, img2.red).to_i\ngre_img2 = CrImage::UInt8Map.new(img2.width, img2.green).to_i\nblu_img2 = CrImage::UInt8Map.new(img2.width, img2.blue).to_i\n\n# Calculate a pixel by pixel difference calculation, convert it to a `Mask`\nred_mask = (red_img1 - red_img2).abs.>(50)\ngre_mask = (gre_img1 - gre_img2).abs.>(50)\nblu_mask = (blu_img1 - blu_img2).abs.>(50)\n\n# Combine the different color channel masks\ncombo_mask = (red_mask | blu_mask | gre_mask).dilate!\n\n# Expensive way to make a thick box.\n3.times do\n  combo_mask.dilate!.segments.each do |v|\n    # Draw a box in the first image\n    ret.draw_square!(v.region.x + 2, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n    # ... and the second image\n    ret.draw_square!(v.region.x + 361, v.region.y, v.region.width, v.region.height, CrImage::Color.of(\"#f00\"))\n  end\nend\n\nret.save(\"differences_end.jpg\")\n```\n\nResults in image:\n\n\"Two\n\nThis script ran on my machine in `66ms` in `--release` mode.\n\n**NOTE**: There's a difference in the seeds on one of the watermelons that don't survive the blurring process, and so aren't picked\nup by the differences algorithm above.","summary":"
Given differences.jpg image:
"}]}]}})
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