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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: 2273–2281

A note about preferred orientations at the first and second stages of complex (second-order) texture channels

Norma Graham and S. Sabina Wolfson  »View Author Affiliations


JOSA A, Vol. 18, Issue 9, pp. 2273-2281 (2001)
http://dx.doi.org/10.1364/JOSAA.18.002273


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Abstract

Complex (second-order) channels have been useful in explaining many of the phenomena of perceived texture segregation. These channels contain two stages of linear filtering with an intermediate pointwise nonlinearity. One unanswered question about these hypothetical channels is that of the relationship between the preferred orientations of the two stages of filtering. Is a particular orientation at the second stage equally likely to occur with all orientations at the first stage, or is there a bias in the “mapping” between the two stages’ preferred orientations? In this study we consider two possible mappings: that where the orientations at the two stages are identical (called “consistent” here) and that where the orientations at the two stages are perpendicular (“inconsistent”). We explore these mappings using a texture-segregation task with textures composed of arrangements of grating-patch elements. The results imply that, to explain perceived texture segregation, complex channels with a consistent orientation mapping must be either somewhat more prevalent or more effective than those with an inconsistent mapping.

© 2001 Optical Society of America

OCIS Codes
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition
(330.5020) Vision, color, and visual optics : Perception psychology
(330.5510) Vision, color, and visual optics : Psychophysics
(330.6100) Vision, color, and visual optics : Spatial discrimination
(330.6110) Vision, color, and visual optics : Spatial filtering
(330.7310) Vision, color, and visual optics : Vision

History
Original Manuscript: November 30, 2000
Revised Manuscript: May 18, 2001
Manuscript Accepted: May 18, 2001
Published: September 1, 2001

Citation
Norma Graham and S. Sabina Wolfson, "A note about preferred orientations at the first and second stages of complex (second-order) texture channels," J. Opt. Soc. Am. A 18, 2273-2281 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-9-2273


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