David H. Brainard studied color appearance and color constancy. Controlled scenes varied illumination and surfaces while observers made achromatic adjustments. Separating the physical illumination from the observer’s judgment tests how the visual system handles the ambiguity between a surface’s reflectance and the light falling on it. [ref]
Mechanisms of color constancy under nearly natural viewing by James M. Kraft and David H. Brainard. 1999, chamber illumination, surfaces and achromatic adjustments
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