Lightness Perception and Lightness Illusions

  title={Lightness Perception and Lightness Illusions},
  author={Edward H. Adelson},
The amount of light coming to the eye from an object depends on the amount of light striking the surface, and on the proportion of light that is reflected. If a visual system only made a single measurement of luminance, acting as a pho-tometer, then there would be no way to distinguish a white surface in dim light from a black surface in bright light. Yet humans can usually do so, and this skill is known as lightness constancy. The constancies are central to perception. An organism needs to… CONTINUE READING
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