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The opponent-process theory suggests that there are three opponent channels, each comprising an opposing color pair: red versus green, blue versus yellow, and black versus white . [1] The theory was first proposed in 1892 by the German physiologist Ewald Hering .
This opponent process sets in after the primary process is quieted. With repeated exposure, the primary process becomes weaker while the opponent process is strengthened. [8] The most important contribution is Solomon's findings on work motivation and addictive behavior. According to opponent-process theory, drug addiction is the result of an ...
Opponent process color theories, which treat intensity and chroma as separate visual signals, provide a biophysical explanation of these chimerical colors. [7] For example, staring at a saturated primary-color field and then looking at a white object results in an opposing shift in hue, causing an afterimage of the complementary color .
The proponents of the opponent process theory believe that these hues cannot be described as a mixture of other hues, and are therefore pure, whereas all other hues are composite. [1] The neural correlate of the unique hues are approximated by the extremes of the opponent channels in opponent process theory. [2]
Opponent process theory. Two complementary theories of color vision are the trichromatic theory and the opponent process theory. The trichromatic theory, or Young–Helmholtz theory, proposed in the 19th century by Thomas Young and Hermann von Helmholtz, posits three types of cones preferentially sensitive to blue, green, and red, respectively.
The conundrum was resolved by the discovery of color-opponent ganglion cells in the retina and lateral geniculate nucleus. We now know that the human eye possesses three types of color-sensitive receptors (as proposed by Young, Maxwell, and Helmholtz) which then combine their signals in three color-opponent channels as proposed by Hering.
According to opponent process theory, the human visual system interprets color information by processing signals from the retinal ganglion cells in three opponent channels: red versus green, blue versus yellow, and black versus white. Responses to one color of an opponent channel are antagonistic to those of the other color.
Opponent process theory suggests that the most contrasting color pairs are red–green and blue–yellow. The black – white color pair is common to all the above theories. These contradictions stem in part from the fact that traditional color theory has been superseded by empirically-derived modern color theory, and in part from the ...