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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

  • Vol. 17, Iss. 8 — Aug. 1, 2000
  • pp: 1485–1488

Stochastic independence of color-vision mechanisms confirmed by a subthreshold summation paradigm

José Antonio Garcı́a, Juan Luis Nieves, Eva Valero, and Javier Romero  »View Author Affiliations


JOSA A, Vol. 17, Issue 8, pp. 1485-1488 (2000)
http://dx.doi.org/10.1364/JOSAA.17.001485


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Abstract

We have used a subthreshold summation protocol to analyze spatial color–color interaction. By means of a CRT color monitor, we measured the threshold contours for a spatial frequency of 0.5 cycles/degree. Heterochromatic flicker photometry was used to obtain isoluminance. The results suggest that the blue–yellow (b–y) and red–green (r–g) contrast thresholds remained unchanged by the addition of fixed r–g and b–y subthreshold pedestals. Our subthreshold summation data then support the stochastic independence of color-vision mechanisms derived from Mullen and Sankeralli’s work [Vision Res. 39, 733 (1999)] despite the differences that exist between the two experimental methods.

© 2000 Optical Society of America

OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(330.1880) Vision, color, and visual optics : Detection
(330.4060) Vision, color, and visual optics : Vision modeling
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition
(330.5510) Vision, color, and visual optics : Psychophysics

History
Original Manuscript: November 11, 1999
Revised Manuscript: March 20, 2000
Manuscript Accepted: March 20, 2000
Published: August 1, 2000

Citation
José Antonio Garcı́a, Juan Luis Nieves, Eva Valero, and Javier Romero, "Stochastic independence of color-vision mechanisms confirmed by a subthreshold summation paradigm," J. Opt. Soc. Am. A 17, 1485-1488 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-8-1485

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