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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: Franco Gori
  • Vol. 29, Iss. 2 — Feb. 1, 2012
  • pp: A324–A336

Quantal and non-quantal color matches: failure of Grassmann’s laws at short wavelengths

Joel Pokorny, Vivianne C. Smith, and Jun Xu  »View Author Affiliations


JOSA A, Vol. 29, Issue 2, pp. A324-A336 (2012)
http://dx.doi.org/10.1364/JOSAA.29.00A324


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Abstract

Previous studies of color matching found that Grassmann’s laws are not obeyed in the short-wavelength region when the method of maximum saturation matching is compared with Maxwell matching. The first experiment evaluated whether the discrepancy might be due to a discrimination matching range asymmetry around either the saturated or desaturated matches and concluded that asymmetry is not the dominant factor. The second and third experiments were designed to evaluate postreceptoral mechanisms. The results pointed to the conjunction of three factors as being the principal cause of the failures of Grassmann’s laws: the spatial inhomogeneity of the macular pigment distribution, the spatially dissimilar L/M-and S-cone distributions, and a change in the weightings of postreceptoral mechanisms mediating S-cone chromatic and L/M-cone luminance discriminations.

© 2012 Optical Society of America

OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.1730) Vision, color, and visual optics : Colorimetry

ToC Category:
Color sensitivity and appearance

History
Original Manuscript: October 4, 2011
Revised Manuscript: November 27, 2011
Manuscript Accepted: November 29, 2011
Published: February 1, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Joel Pokorny, Vivianne C. Smith, and Jun Xu, "Quantal and non-quantal color matches: failure of Grassmann’s laws at short wavelengths," J. Opt. Soc. Am. A 29, A324-A336 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-2-A324

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