PPM Transformation Project

This project provides various image processing functions for PPM (Portable Pixmap) files.

Functions

It includes the following functions:

• sepia(): converts an image to sepia tone.
• mirror(): horizontally mirrors an image.
• nup(): scales down an image by a factor of scale.
• bitmap(): converts a PPM image to PBM (Portable Bitmap) format.
• grayscale(): converts a PPM image to PGM (Portable Graymap) format.
• thumbnail(): scales down an image to the specified width and height.

Usage

The program reads a PPM file and applies one or more image processing functions on it. The processed image can then be written to a new file.

Command-line Arguments

The program accepts the following command-line arguments:

• -h, --help: shows the help message.
• -i <input_file>, --input <input_file>: specifies the input file.
• -o <output_file>, --output <output_file>: specifies the output file.
• -s , --scale : specifies the scale factor for the nup() function.
• -w , --width : specifies the width of the output image for the thumbnail() function.
• -t , --height : specifies the height of the output image for the thumbnail() function.

Examples

• Convert an image to sepia tone and write it to a new file:

$ ./ppm_transform -i input.ppm -o output.ppm sepia

• Scale down an image by a factor of 2 and write it to a new file:

$ ./ppm_transform -i input.ppm -o output.ppm -s 2 nup

• Convert a PPM image to PGM format and write it to a new file:

$ ./ppm_transform -i input.ppm -o output.pgm grayscale

• Create a thumbnail image with a width of 100 and a height of 50:

$ ./ppm_transform -i input.ppm -o output.ppm -w 100 -t 50 thumbnail