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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 22, Iss. 10 — Oct. 1, 2005
  • pp: 2143–2153

Seeing unique hues

Israel Abramov and James Gordon  »View Author Affiliations


JOSA A, Vol. 22, Issue 10, pp. 2143-2153 (2005)
http://dx.doi.org/10.1364/JOSAA.22.002143


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Abstract

Hue can be described by four separate sensations of red (R), green (G), yellow (Y), and blue (B). These are combined in the spectrally opponent RG and YB mechanisms, whose null points correspond to the unique sensations of Y, G, B. Participants used a form of magnitude estimation to describe color appearance of light flashes that were systematically varied in size, luminance, duration, purity, and retinal eccentricity. Wavelengths of the unique hues were derived from the hue and saturation scaling functions. Only unique Y remained invariant across all the viewing conditions. The shifts in unique hues with test conditions place strong restrictions on models of how the RG and YB mechanisms are assembled. Despite polymorphism of L and M cones and variation of their ratios across participants and across the retina, the frequency distribution of unique Y was very narrow, implying some reweighting of cone inputs to individuals’ RG mechanisms.

© 2005 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1690) Vision, color, and visual optics : Color
(330.1720) Vision, color, and visual optics : Color vision
(330.4060) Vision, color, and visual optics : Vision modeling
(330.4270) Vision, color, and visual optics : Vision system neurophysiology
(330.5310) Vision, color, and visual optics : Vision - photoreceptors

ToC Category:
Color Vision

History
Original Manuscript: February 4, 2005
Revised Manuscript: May 2, 2005
Manuscript Accepted: May 16, 2005
Published: October 1, 2005

Citation
Israel Abramov and James Gordon, "Seeing unique hues," J. Opt. Soc. Am. A 22, 2143-2153 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-10-2143

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