Opponent colors theory

The HunterLab system (1958) was the hrst to use the opponent color theory stating that the red, green, and blue cone responses are re-mixed into opponent coders as they move up the optic nerve to the brain.Based on that theory, the HunterLab color space is three-dimensional and rectangular (see Figure 1.6). 

A uniform color scale devised by Hnnter in 1958 for nse on a color difference meter, based on the opponent color theory of vision. 

Figure 16.2 The Hunter Lab color space in a cube form. It is based on the Opponent-Colors Theory. The theory assumes that the human eye perceive color as pairs of opposites, namely, light-dark, red-green, yellow-blue (with HunterLab permission).

Hurvich, L. and D. Jameson. 1957. An opponent-process theory of color vision. Psychol. Rev. 64, 384-404. 

The trichromatic theory, subsequendy confirmed by the existence of the three sets of cones, must be combined with the opponent theory, which is involved in the retinal pathway. A third approach, the appearance theory (2) or the retinex theory, must be added to explain color constancy and other effects. As one example of this last, consider an area perceived as red in a multicolored object such as a Mondrian painting when illuminated with white... 

Oppenauer oxidation, 24 506 Opponent theory, of color, 7 304 Opportunistic systematic generation strategy, 22 300 for binary systems, 22 324t flowsheet construction and, 22 307 rules for selecting, 22 313t, 315 Opportunity fuels, defined, 6 828 Opposition patent information searches, 18 235... 

Figure 2.20 The transformation performed by the color opponency mechanism may be a simple rotation of the coordinate system. In this case, the mechanism for color constancy may operate on the rotated coordinates. (Reprinted from Vision Res., Vol. 26, No. 1, Edwin H. Land, Recent advances in retinex theory, pp. 7-21, Copyright 1986, with permission from Elsevier.)...

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