Unique Hues
Unique hue is a term used in certain theories of color vision, which implies that human perception distinguishes between "unique" (psychologically primary) and composite (mixed) hues. A unique hue is defined as a color which an observer perceives as a pure, without any admixture of the other colors. Ewald Hering first defined the unique hues as red, green, yellow, and blue, and based them on the concept that these colors could not be simultaneously perceived. For example, a color cannot appear both red and green; the color would cancel out to yellow. There is a great deal of variability when defining unique hues experimentally, however, a single observer can usually set their experience of a unique hue extremely consistently, to within a few nanometers. Unique hues can differ between people, and depend on the state of adaptation of the visual system. They are often used in psychophysical research to measure variations in color perception due to color abnormalities or color adaptat ...
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Opponent Color Circle 1917
The Opponent may refer to: * ''The Opponent'' (1988 film), a 1988 film starring Daniel Greene * ''The Opponent'' (2000 film), a 2000 film starring Erika Eleniak {{DEFAULTSORT:Opponent, The ...
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