According to the ratio principle of lightness constancy, the perceived lightness of a region is based on the:
A) relative intensity of the illuminating light.
B) absolute amount of light reflected from the region and its surround.
C) difference in color between the region and its surround.
D) relative amounts of light reflected from the region and its surround.

Question

Quizplus · Accepted Answer

The ratio principle of lightness constancy suggests that our perception of an object's lightness is determined by the ratio of light reflected by the object to the light reflected by its surroundings, rather than the absolute amount of light. This helps maintain the perceived lightness of objects under varying lighting conditions.

According to the Ratio Principle of Lightness Constancy, the Perceived