RobinZ comments on Bizarre Illusions - Less Wrong
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This is perhaps beating a dead horse, but "albedo" is supposed to be a ratio between reflected and incident lights, and I would bet that the albedo of these two patches of screen is also identical, just as their RGB values are identical.
When I said "interpreting the image as a picture", I meant, "interpreting the image as a picture of a checkerboard with a cylinder casting a shadow on it" - the albedos in question are of the squares A and B on the depicted board.
Ah, "inferred albedo". In that case we agree.