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p. 293. Lightness and colourlocked

  • Brian Rogers


‘Lightness and colour’ considers visual perception and attempts to identify some of the characteristics of the patterns of light reaching our eyes that might contribute to the information we need for survival. It discusses trichromatic vision in humans; the problem of metamerism; and the implications trichromacy has for the ability to describe and differentiate colours, including intensity, hue, and saturation. The pick-up of particular perceptual characteristics—the lightness and colour of the surfaces that surround us—should not be thought of as ends in themselves, but rather as a contribution to a perceptual system that has evolved to allow us to act successfully in a particular ecological niche.

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