Reconstructed video and sent to receiver side

combine_frames.m

@@ -24,4 +24,9 @@
     filename = [sprintf('%d',i) '.bmp'];
     fullname = fullfile(workingDir, 'embeddedFramesRGB',  filename);
     imwrite(RGB,fullname);
+
+    % Constructing video from embeddedFramesRGB frames
+    % ffmpeg -start_number 1 -i %d.bmp -vcodec mpeg4 reconstructed.mp4
+    % https://github.com/FFmpeg/FFmpeg
+
 end

receiver_constructFrames.m

@@ -0,0 +1,201 @@
+% Making directories
+workingDir = 'frames';
+mkdir(workingDir,'receiver_framesRGB');
+mkdir(workingDir,'receiver_framesYCbCr');
+mkdir(workingDir,'receiver_framesY');
+mkdir(workingDir,'receiver_framesU');
+mkdir(workingDir,'receiver_framesV');
+
+%=== Get video reader obj for the video ===%
+video = VideoReader('reconstructed.mp4');
+i = 1;
+
+
+%=== Convert each video frame into different formats and store them ===%
+while hasFrame(video)
+
+   % Read frame from the video %
+   img = readFrame(video);
+   % Get YCbCr format from inbuilt function %
+   % YCbCr = rgb2ycbcr(img);
+   % Get YUV format from function defined in rgb2yuv.m %
+   % each frame's Y, U, V component to be stored separately %
+   [Y, U, V] = rgb2yuv(img);
+   % Naming for each frame %
+   filename = [sprintf('%d',i) '.bmp'];
+
+   %=== Store the frames in their respective directories ===%
+   fullname = fullfile(workingDir,'receiver_framesRGB',filename);
+   imwrite(img,fullname);
+   % fullname = fullfile(workingDir,'imagesYCbCr',filename);
+   % imwrite(YCbCr,fullname);
+   fullname = fullfile(workingDir,'receiver_framesY',filename);
+   imwrite(Y,fullname);
+   fullname = fullfile(workingDir,'receiver_framesU',filename);
+   imwrite(U,fullname);
+   fullname = fullfile(workingDir,'receiver_framesV',filename);
+   imwrite(V,fullname);
+
+   i = i+1;
+end
+
+%=== Get no of frames of the video ===%
+numOfFrames = floor(video.FrameRate*video.Duration) - 1;
+disp(numOfFrames);
+
+% Fix a key %
+key = 5;
+
+% Determining the number of slots based on key
+cycle = floor(320/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+	% Reading images from 1 to 166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesV',filename);
+    frame = imread(fullname);
+    abc = frame;
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+		% Skipping odd slots
+        if mod(j,2) == 1
+            continue;
+        end
+		% Swapping xth slot with cycle-x th slot
+        temp = frame((j-1)*key+1:j*key,:);
+        frame((j-1)*key+1:j*key,:) = frame(endpart:endpart+key-1,:);
+        frame(endpart:endpart+key-1,:) = temp;
+    end
+    imwrite(frame,fullname);
+end
+
+% Repeating the swapping procedure column wise
+
+cycle = floor(560/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesV',filename);
+    frame = imread(fullname);
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+        if mod(j,2) == 1
+            continue;
+        end
+        temp = frame(:,(j-1)*key+1:j*key);
+        frame(:,(j-1)*key+1:j*key) = frame(:,endpart:endpart+key-1);
+        frame(:,endpart:endpart+key-1) = temp;
+    end
+    %figure, imshow(frame);
+    imwrite(frame,fullname);
+
+end
+
+% Repeating the scrambling procedure for Y and U as well
+cycle = floor(320/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesY',filename);
+    frame = imread(fullname);
+    abc = frame;
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+        if mod(j,2) == 1
+            continue;
+        end
+        temp = frame((j-1)*key+1:j*key,:);
+        frame((j-1)*key+1:j*key,:) = frame(endpart:endpart+key-1,:);
+        frame(endpart:endpart+key-1,:) = temp;
+    end
+    imwrite(frame,fullname);
+end
+
+cycle = floor(560/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesY',filename);
+    frame = imread(fullname);
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+        if mod(j,2) == 1
+            continue;
+        end
+        temp = frame(:,(j-1)*key+1:j*key);
+        frame(:,(j-1)*key+1:j*key) = frame(:,endpart:endpart+key-1);
+        frame(:,endpart:endpart+key-1) = temp;
+    end
+    %figure, imshow(frame);
+    imwrite(frame,fullname);
+
+end
+
+
+cycle = floor(320/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesU',filename);
+    frame = imread(fullname);
+    abc = frame;
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+        if mod(j,2) == 1
+            continue;
+        end
+        temp = frame((j-1)*key+1:j*key,:);
+        frame((j-1)*key+1:j*key,:) = frame(endpart:endpart+key-1,:);
+        frame(endpart:endpart+key-1,:) = temp;
+    end
+    imwrite(frame,fullname);
+end
+
+cycle = floor(560/key);
+
+if mod(cycle,2) == 1
+    cycle = cycle - 1;
+end
+
+for i = 1:166
+    filename = [sprintf('%d',i) '.bmp'];
+    fullname = fullfile(workingDir,'receiver_framesU',filename);
+    frame = imread(fullname);
+    for j = 1:cycle/2        
+        endpart1 = cycle - j;
+        endpart = (endpart1*key)+1;
+        if mod(j,2) == 1
+            continue;
+        end
+        temp = frame(:,(j-1)*key+1:j*key);
+        frame(:,(j-1)*key+1:j*key) = frame(:,endpart:endpart+key-1);
+        frame(:,endpart:endpart+key-1) = temp;
+    end
+    %figure, imshow(frame);
+    imwrite(frame,fullname);
+end