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High-level trichromatic color matching and the pigment-bleaching hypothesis

1980; Elsevier BV; Volume: 20; Issue: 1 Linguagem: Inglês

10.1016/0042-6989(80)90138-8

1878-5646

Günter Wyszecki, Walter Stiles,

Color Science and Applications

Maxwell-type color matches with reference to a given "white" stimulus at a retinal illuminance of 100,000 td can be predicted from Maxwell-type color matches made with reference to the same "white" stimulus but at a retinal illuminance of 1000 td by means of a simple hypothesis of bleaching of the visual pigments. The spectral distributions of the fundamentals of color vision, the densities of the visual pigments of the 1000 and 100,000 td levels, as well as the spectral transmit tances of the lens and macula pigments which must be assumed as essential parameters of the visual mechanism emerge with values which appear consistent with those obtained from other investigations. While both the "red" and the "green" fundamentals exhibit strong and predictable bleaching characteristics, the "blue" fundamental appears to bleach only very little under the given experimental conditions. The somewhat unexpected behavior of the "blue" fundamental is not explained, but it is suggested that the pigment associated with the "blue" fundamental may be in a near-diluted state already at moderate levels of retinal illuminance, making it difficult to detect bleaching at higher levels.