https://www.youtube.com/watch?v=LFXN9PiOGtY – What YCbCr, RGB and CMY(K) is.

Joint Picture Experts Group – JPEG – a way to compress an image:
https://www.youtube.com/watch?v=n_uNPbdenRs – JPEG and colors
https://www.youtube.com/watch?v=Q2aEzeMDHMA – DCT -> color reduction.

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