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Issues with Color Spaces and Perceptual Brightness
Unlike RGB, the CIELab color space And the more modern variants like CIECAM02 and Oklab. is designed to be perceptually uniform. This is a broad goal, which roughly means that we would like changes in the numbers to match same changes that we observe when performing various studies of human perce
This is a broad goal, which roughly means that we would like changes in the numbers to match same changes that we observe when performing various studies of human perception. There is some recent research I found that models this effect and applies an additional transform to account for it, building off of work from Fairchild MD, Pirrotta E in the 90’s. Using the L_EAL value instead jumps us right to the end, giving the exact perceptual gray color to place in the resulting desaturated image.
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