Discussion
CIELAB is described as incorporating a chromatic adaptation transform because
Answer: D
Correct answer: dividing by the white point approximates von Kries adaptation
Each of X, Y and Z is divided by the corresponding value for the white before the cube root is taken, which scales the responses to the illumination. That is a crude von Kries transform performed in XYZ rather than in a cone space, and it is why CIELAB values are comparable across illuminants at all.
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