Study shows how brain interprets surfaces

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The stucco-like surface on the right looks darker and glossier than the one on the left even though the mean luminance of both images is equal. The luminance histogram of the image on the right is positively skewed and the one on the left is negative ...
The stucco-like surface on the right looks darker and glossier than the one on the left even though the mean luminance of both images is equal. The luminance histogram of the image on the right is positively skewed and the one on the left is negatively skewed. Credit: Edward Adelson

Imagine looking at a pool of spilled milk. Your brain knows that it's milk and not another white substance like sugar, or cottage cheese, but how does it know?


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