The simultaneous contrast phenomenon: each small square is actually the same intensity but, because of the different intensities of the surrounds, the small squares do not appear equally bright. The hue of a patch is also dependent on the wavelength composition of surrounding light. A white patch on a black background will appear to be yellowish if the surround is a blue light.
| Figure Illustration of simultaneous contrast (adapted from Pratt, 1991) | |
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Last modified on April 05, 1999, G. Scott Owen, owen@siggraph.org