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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. 18, Iss. 9 — Sep. 1, 2001
  • pp: 2209–2219

Visual response saturation to orientation contrast in the perception of texture boundary

Isamu Motoyoshi and Shin’ya Nishida  »View Author Affiliations


JOSA A, Vol. 18, Issue 9, pp. 2209-2219 (2001)
http://dx.doi.org/10.1364/JOSAA.18.002209


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Abstract

We analyzed how the visual response to orientation modulation in texture patterns varied as a function of the magnitude of orientation contrast. Using a contrast-discrimination technique, we measured threshold increments of orientation contrast (the orientation contrast required for discriminating between two textures) at various pedestal-orientation contrasts. The orientation-contrast-response function estimated for a step-orientation contrast, which produces a vivid percept of surface boundaries, saturated at approximately 30° (experiment 1). The saturation was still evident even when the strength of the step-orientation contrast was reduced by orientation noise (experiment 2), but no strong saturation was found for textures that did not produce a vivid percept of surface boundaries (experiment 3). These results are consistent with the notion that orientation-based texture segregation involves the generation of a neural representation of the surface boundary whose strength is nearly independent of the magnitude of orientation contrast.

© 2001 Optical Society of America

OCIS Codes
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition
(330.5510) Vision, color, and visual optics : Psychophysics
(330.6100) Vision, color, and visual optics : Spatial discrimination

History
Original Manuscript: November 28, 2000
Revised Manuscript: April 30, 2001
Manuscript Accepted: April 30, 2001
Published: September 1, 2001

Citation
Isamu Motoyoshi and Shin’ya Nishida, "Visual response saturation to orientation contrast in the perception of texture boundary," J. Opt. Soc. Am. A 18, 2209-2219 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-9-2209


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