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Proceedings Paper

Standard model of color vision: problems and an alternative
Author(s): Russell L. De Valois
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Paper 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.

Paper Details

Date Published: 17 March 1994
PDF: 6 pages
Proc. SPIE 2054, Computational Vision Based on Neurobiology, (17 March 1994); doi: 10.1117/12.171148
Show Author Affiliations
Russell L. De Valois, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 2054:
Computational Vision Based on Neurobiology
Teri B. Lawton, Editor(s)

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