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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: 2137–2142

Effect of stimulus intensity on the sizes of chromatic perceptive fields

Lucy J. Troup, Michael A. Pitts, Vicki J. Volbrecht, and Janice L. Nerger  »View Author Affiliations


JOSA A, Vol. 22, Issue 10, pp. 2137-2142 (2005)
http://dx.doi.org/10.1364/JOSAA.22.002137


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Abstract

The effects of intensity on chromatic perceptive field size were investigated along the horizontal meridian at 10° temporal eccentricity by manipulating stimulus intensity from 0.3 to 3.3 log trolands. Following light adaptation, observers described the hue and saturation of monochromatic stimuli ( 440 660 nm , in 10 nm steps) for a series of test sizes (0.098–3°) presented along the time period associated with the cone plateau of the dark-adaptation function. Perceptive field sizes of the four elemental hues (red, green, yellow, and blue) and the saturation component were estimated by three observers at each intensity level for each wavelength. In general, perceptive field sizes of blue and red are the smallest, and yellow and green are the largest. Furthermore, perceptive field sizes of all four hues decrease with increasing stimulus intensity, though the absolute change is largest for green and yellow. The decrease in size with increase in intensity cannot be completely explained in terms of saturation or rod signals and is likely, then, attributable to a cone-based mechanism.

© 2005 Optical Society of America

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

ToC Category:
Color Vision

History
Original Manuscript: January 18, 2005
Revised Manuscript: April 3, 2005
Manuscript Accepted: April 5, 2005
Published: October 1, 2005

Citation
Lucy J. Troup, Michael A. Pitts, Vicki J. Volbrecht, and Janice L. Nerger, "Effect of stimulus intensity on the sizes of chromatic perceptive fields," J. Opt. Soc. Am. A 22, 2137-2142 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-10-2137

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