ann sanfedele wrote:
Or a lot of white or any color area that lacks detail, yes? (all other things being equal).
Correct. Compression works to no more than the extent that the data (image) being compressed has repetitious data (redundancy). So areas with low detail (largely the same, or slowly changing, color) will compress better than areas with lots of detail (lots of different colors and they change quickly neighbor-to-neighbor).
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