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SemanticVideoSubSampler.m
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% This file is part of ICIP.
%
% ICIP is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% ICIP is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with ICIP. If not, see <http://www.gnu.org/licenses/>.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Class Name: SemanticVideoSubSampler
%
% This class is an adaptation of the VideoSubSampler class present
% in the EgoSampling code. It subsamples the video according to
% list of frame indices.
%
% $Date: July 26, 2017
% ____________________________________________________________________
classdef SemanticVideoSubSampler < handle
%SemanticVideoSubSampler subsamples video according to list of frame indices
properties
sd;
cfg;
SemanticData;
end
methods
function obj = SemanticVideoSubSampler(sd, cfg, SemanticData)
obj.sd = sd;
obj.cfg = cfg;
obj.SemanticData = SemanticData;
end
function subSampleStereoVideo(obj, pairs)
switch obj.cfg.get('OutputStablizer')
case 'None'
stabilizer=NullVideoStabilizer(obj.sd,obj.cfg,pairs);
case 'StereoStabilizer'
stabilizer=StereoVideoStabilizer(obj.sd,obj.cfg,pairs);
end
alpha = obj.cfg.get('ShakinessTermWeight');
beta = obj.cfg.get('VelocityTermWeight');
gamma = obj.cfg.get('AppearanceTermWeight');
eta = obj.cfg.get('SemanticTermWeight');
if(size(alpha, 2) > 1)
writer = VideoWriter([obj.cfg.get('outputVideoFileName'), '/', obj.cfg.get('FileName'),...
'_S(', alpha(1,1), ',', alpha(1,2), ')_V(', beta(1,1), ',', beta(1,2),...
')_A(', gamma(1,1), ',', gamma(1,2), ')_M(', eta(1,1), ',', eta(1,2), ')']);
else
writer = VideoWriter([obj.cfg.get('outputVideoFileName'), '/', obj.cfg.get('FileName'),...
'_S', obj.cfg.get('ShakinessTermWeight'), '_V', obj.cfg.get('VelocityTermWeight'),...
'_A', obj.cfg.get('AppearanceTermWeight'), '_M', obj.cfg.get('SemanticTermWeight')]);
end
writer.FrameRate = obj.cfg.get('FPS');
fprintf('%sStarting to and export frames from dump..\n',log_line_prefix);
writer.open();
for i = 1:size(pairs,1)
if stabilizer.HasNext()==0
break;
end
[left,right] = stabilizer.StabilizeNextPair();
if obj.cfg.get('StereoOutputWCropPercent')>0
Wcrop = ceil(obj.cfg.get('StereoOutputWCropPercent') * size(left,2));
if Wcrop>0
left = left(:,Wcrop:end-Wcrop);
right = right(:,Wcrop:end-Wcrop);
end
end
if obj.cfg.get('StereoOutputHCropPercent')>0
Hcrop = ceil(obj.cfg.get('StereoOutputHCropPercent') * size(left,1));
if Hcrop>0
left = left(Hcrop:end-Hcrop,:);
right = right(Hcrop:end-Hcrop,:);
end
end
switch obj.cfg.get('StereoFrameOrdering')
case 'Interleaving'
writer.writeVideo(right);
writer.writeVideo(left);
case 'SideBySide'
writer.writeVideo([left right]);
case 'RedCyan'
I=imfuse(left,right,'ColorChannel','red-cyan');
writer.writeVideo(I);
end
if obj.cfg.get('ShowOutputWhileDumping')==1
if i==1
f=figure;
end
figure(f);
imshowpair(left,right,'ColorChannels','red-cyan');
title(sprintf('Frames [%d,%d]',pairs(i,2),pairs(i,1)));
drawnow;
end
if mod(i,50) == 0
fprintf('%sExporting pair #%d..\n',log_line_prefix,i);
end
end
writer.close();
fprintf('%sDone exporting pairs..\n',log_line_prefix);
end
function subSampleVideo (obj, frame_indices, foe_locations, output_video_filename)
fprintf('%sLoading the input video to memory...\n',log_line_prefix);
reader = VideoReader(obj.cfg.get('inputVideoFileName'));
if max(frame_indices) > reader.NumberOfFrames
error('output frame index %d exceded input video size %d',max(frame_indices),reader.NumberOfFrames);
end
fprintf('%sStarting to export frames...\n',log_line_prefix);
alpha = obj.cfg.get('ShakinessTermWeight');
beta = obj.cfg.get('VelocityTermWeight');
gamma = obj.cfg.get('AppearanceTermWeight');
eta = obj.cfg.get('SemanticTermWeight');
if(size(alpha, 2) > 1)
writer = VideoWriter([output_video_filename, '/', obj.cfg.get('FileName'),...
'_S(', num2str(alpha(1,1)), ',', num2str(alpha(1,2)), ')_V(', num2str(beta(1,1)), ',', num2str(beta(1,2)),...
')_A(', num2str(gamma(1,1)), ',', num2str(gamma(1,2)), ')_M(', num2str(eta(1,1)), ',', num2str(eta(1,2)), ')']);
else
writer = VideoWriter([output_video_filename, '/', obj.cfg.get('FileName'),...
'_S', obj.cfg.get('ShakinessTermWeight'), '_V', obj.cfg.get('VelocityTermWeight'),...
'_A', obj.cfg.get('AppearanceTermWeight'), '_M', obj.cfg.get('SemanticTermWeight')]);
end
writer.FrameRate = reader.FrameRate;
baseFileName = obj.cfg.get('baseDumpFrameFileName');
%if no dump exists, reading the frames from the video
%if ~exist(sprintf(baseFileName,frame_indices(1)),'file')
% readVideo = true;
% reader = VideoReader(obj.cfg.get('inputVideoFileName'));
%else
% readVideo = false;
%end
writer.open();
%Object access are high computational cost, therefore assigning
%them outside loops is better than inside.
showOutputWhileDumpling = obj.cfg.get('ShowOutputWhileDumping');
saveFramesWhileDumping = obj.cfg.get('SaveFramesWhileDumping');
outputOriginalFrameNum = obj.cfg.get('OutputOriginalFrameNum');
outputOriginalTimestamp = obj.cfg.get('OutputOriginalTimestamp');
outputTheoreticalSpeedup = obj.cfg.get('OutputTheoreticalSpeedup');
outputFOEMovements = obj.cfg.get('OutputFOEMovements');
outputSemanticBoxes = obj.cfg.get('OutputSemanticBoxes');
outputSemanticWeight = obj.cfg.get('OutputSemanticWeight');
%facesWeight = obj.cfg.get('SemanticWeight');
if outputFOEMovements
%Creating video OF adders
foe_movements_frame = zeros(reader.height, reader.width, 3, 'uint8');
%Adding the first difference of FOE OFs (it should be [x=0 y=0]
foe_locations = vertcat([0 0], foe_locations);
base_x = (size(foe_movements_frame, 2)/2);
base_y = (size(foe_movements_frame, 1)/2);
center_to_corner_distance = norm([base_x base_y] - [0 0]);
amplifier_factor = min(center_to_corner_distance./max(foe_locations));
end
if outputTheoreticalSpeedup
RangesAndSpeedups = obj.cfg.get('RangesAndSpeedups');
Speedups = obj.cfg.get('Speedups');
non_semantic_speedup = Speedups(1,2);
end
k = 1;
for i = 1:length(frame_indices)
%if readVideo
% frame = read(reader,frame_indices(i));
%else
% frame = imread(sprintf(baseFileName,frame_indices(i)));
%end
%if read doesn't work, use readframe instead
frame = read(reader,frame_indices(i));
if outputOriginalFrameNum==1 || outputOriginalTimestamp==1 || outputSemanticWeight
embedText = '';
if outputOriginalTimestamp==1
embedText = sprintf('[%s]',datestr((frame_indices(i)/reader.FrameRate)/86400,'HH:MM:SS'));
end
if outputOriginalFrameNum==1
embedText = sprintf('%s Frame #%d',embedText,frame_indices(i));
end
if outputSemanticWeight
embedText = sprintf('%s SemanticWeight=%.3f', embedText, FrameSemanticValue(obj.SemanticData{frame_indices(i)}));
end
if outputTheoreticalSpeedup
if frame_indices(i) >= RangesAndSpeedups(2,k)
while k < size(RangesAndSpeedups, 2) && frame_indices(i) > RangesAndSpeedups(2,k)
k = k+1;
end
end
if frame_indices(i) < RangesAndSpeedups(1, k) || frame_indices(i) > RangesAndSpeedups(2, k)
speedupText = [num2str(non_semantic_speedup) 'x'];
frame = insertObjectAnnotation(frame,'rectangle',[size(frame,2),size(frame,1),5,5],speedupText,'FontSize',40);
else
speedupText = [num2str(RangesAndSpeedups(3, k)) 'x'];
frame = insertObjectAnnotation(frame,'rectangle',[size(frame,2),size(frame,1),5,5],speedupText,'FontSize',40);
end
end
frame = insertObjectAnnotation(frame,'rectangle',[20,20,5,5],embedText,'FontSize',20);
end
if outputSemanticBoxes
df_dts_i = obj.SemanticData{frame_indices(i)};
for j=1:length(df_dts_i)
face_score = sprintf('Sc=%.3f Gs=%.3f Sz=%.3f Total=%.3f',...
df_dts_i(j).score, df_dts_i(j).gaussianWeight, df_dts_i(j).faceSizeValue,...
df_dts_i(j).score * df_dts_i(j).gaussianWeight * df_dts_i(j).faceSizeValue);
%face_id = sprintf('Face %d scoring %.3f', j, df_dts_i(j).score);
frame = insertObjectAnnotation(frame, 'rectangle',...
[df_dts_i(j).col, df_dts_i(j).row, df_dts_i(j).width, df_dts_i(j).height],...
face_score, 'Color', 'r', 'FontSize', 22);
end
end
if outputFOEMovements
x = floor(base_x + foe_locations(i,2) * amplifier_factor);
y = floor(base_y + foe_locations(i,1) * amplifier_factor);
%Inserting a line on movements image
foe_movements_frame = insertShape(foe_movements_frame, 'line',...
[base_x base_y x y], 'LineWidth', 3);
composed_frame = frame + foe_movements_frame;
writer.writeVideo(composed_frame);
else
writer.writeVideo(frame);
end
if showOutputWhileDumpling==1
if i==1
f=figure;
end
figure(f);
if outputSemanticBoxes
for j=1:size(obj.SemanticData{frame_indices(i)}, 1)
face_id = sprintf('Face %d', j);
frame = insertObjectAnnotation(frame, 'rectangle', obj.SemanticData{frame_indices(i)}(j,:), face_id, 'Color', 'r');
end
end
if outputFOEMovements
imshow(composed_frame);
title(sprintf('FOE = %d --- Frame %d',foe_locations(i), frame_indices(i)));
else
imshow(frame);
title(sprintf('Frame %d',frame_indices(i)));
end
drawnow;
end
if saveFramesWhileDumping==1
imwrite(frame, sprintf(baseFileName,frame_indices(i)));
end
if mod(i,50) == 0
fprintf('%sExporting frame #%d..\n',log_line_prefix,i);
end
end
fprintf('%sDone exporting frames..\n',log_line_prefix);
writer.close();
end
end
end