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LIGHTNESS AND BRIGHTNESS

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  • Overview
  • Simultaneous brightness contrast
  • Mach Bands
  • Chubb Illusion
  • Craik-O’Brain-Cornsweet effect
  • Perceiving Luminance
  • See For Yourself

Overview

The most basic sensations in vision – lightness and brightness – are elicited by luminance, which is defined as the overall physical intensity of a light stimulus. As a number of the demonstrations here show, these percepts can be radically altered by empirical information that changes the frequency of occcurrences of the possible sources of the various stimuli shown over the course of human experience.

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