But in one of project pdf's I studied that RGB to YCbCr transform may be the most frequently used one for the lossy compression of colour image .But I need to perform it for lossless compression.
how to convert RGB image into YCuCv model by using reversible colour transform ?
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I need to perform the above asked method in my project.
Answers (1)
Thorsten
on 17 Dec 2014
See https://en.wikipedia.org/wiki/JPEG_2000#Color_components_transformation
I = imread('peppers.png');
R = I(:,:,1); G = I(:,:,2); B = I(:,:,3);
Y = floor((R + 2*G + B)/4);
Cb = B - G;
Cr = R - G;
6 Comments
Thorsten
on 17 Dec 2014
Reversible color tranformation means lossless here. Please check the link I provided to see how to convert back to RGB.
Image Analyst
on 20 Dec 2014
Just use imwrite() to create a PNG file. I don't know what it does internally, but it's the lossless compression method that is the most commonly used.
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