Standard model of color vision: problems and an alternative

Russell L. De Valois

doi:10.1117/12.171148

17 March 1994 Standard model of color vision: problems and an alternative

Russell L. De Valois

Author Affiliations +

Proceedings Volume 2054, Computational Vision Based on Neurobiology; (1994) https://doi.org/10.1117/12.171148
Event: Computational Vision Based on Neurobiology, 1993, Park Grove, CA, United States

Abstract

The standard model of early color processing postulates an achromatic magno LGN non- opponent pathway summing the outputs of the L and M cones; a red-green parvo LGN opponent cell system differencing L and M cones; and a yellow-blue or tritan parvo LGN opponent cell system differencing S from the (L + M) cones. A number of psychophysical and perceptual findings, however, do not agree with this standard model, and we have suggested an alternative. Our model diverges from that above in three fundamental ways: (1) L-M and M-L cells do not constitute the `red-green' system, but serve as the principal inputs to both the red-green and yellow-blue systems; (2) S-LM and LM-S opponent cells do not constitute the yellow-blue system, but rather combine at a third stage with the LM opponent cells in different ways to produce both the red-green and the yellow-blue systems, serving a modulatory role to break the one effective LGN response axis into separate red-green and yellow-blue perceptual color axes at some cortical site; (3) in addition to chromatic information, the parvo opponent cells (as well as the magno cells) carry intensity information, the chromatic and intensity components being separated at the third stage.

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Russell L. De Valois "Standard model of color vision: problems and an alternative", Proc. SPIE 2054, Computational Vision Based on Neurobiology, (17 March 1994); https://doi.org/10.1117/12.171148

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