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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. 31, Iss. 4 — Apr. 1, 2014
  • pp: A140–A147

Filling in, filling out, or filtering out: processes stabilizing color appearance near the center of gaze

Sean F. O’Neil and Michael A. Webster  »View Author Affiliations


JOSA A, Vol. 31, Issue 4, pp. A140-A147 (2014)
http://dx.doi.org/10.1364/JOSAA.31.00A140


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Abstract

Spectral sensitivity varies markedly across the center of gaze, in part because of the rapid decline in the density of macular pigment outside the fovea. Yet despite these retinal inhomogeneities, the color appearance of large uniform fields remains very uniform. We explored some of the processes contributing to these stable color percepts by measuring the effects of field size and eccentricity on saturated purples, whose spectra should show the largest biases with macular pigment screening. Small purple fields at 0° and 8° eccentricities differ in appearance but by much less than predicted by the macular screening or by compensation for the average effects of this screening at the two loci. This shows that the compensation is already nearly complete because of local adjustments that filter out the sensitivity variation and confirms that this filtering includes adjustments beyond average gain changes in the cones. In large fields, the appearance is dominated by the local peripheral color. This bias persists when the field edge is fixated or when abrupt edges are removed in Gaussian spots, suggesting that the spreading is not strongly dependent on luminance edges.

© 2014 Optical Society of America

OCIS Codes
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1720) Vision, color, and visual optics : Color vision
(330.5510) Vision, color, and visual optics : Psychophysics

ToC Category:
Color sensitivity and appearance

History
Original Manuscript: October 18, 2013
Revised Manuscript: December 15, 2013
Manuscript Accepted: December 17, 2013
Published: January 24, 2014

Virtual Issues
Vol. 9, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Sean F. O’Neil and Michael A. Webster, "Filling in, filling out, or filtering out: processes stabilizing color appearance near the center of gaze," J. Opt. Soc. Am. A 31, A140-A147 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-4-A140

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