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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. 24, Iss. 7 — Jul. 1, 2007
  • pp: 1873–1885

Structural sparseness and spatial phase alignment in natural scenes

Bruce C. Hansen and Robert F. Hess  »View Author Affiliations


JOSA A, Vol. 24, Issue 7, pp. 1873-1885 (2007)
http://dx.doi.org/10.1364/JOSAA.24.001873


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Abstract

The Fourier phase spectrum plays a central role regarding where in an image contours occur, thereby defining the spatial relationship between those structures in the overall scene. Only a handful of studies have demonstrated psychophysically the relevance of the Fourier phase spectrum with respect to human visual processing, and none have demonstrated the relative amount of local cross-scale spatial phase alignment needed to perceptually extract meaningful structure from an image. We investigated the relative amount of spatial phase alignment needed for humans to perceptually match natural scene image structures at three different spatial frequencies [3, 6, and 12   cycles per degree (cpd)] as a function of the number of structures within the image (i.e., “structural sparseness”). The results showed that (1) the amount of spatial phase alignment needed to match structures depends on structural sparseness, with a bias for matching structures at 6 cpd and (2) the ability to match partially phase-randomized images at a given spatial frequency is independent of structural sparseness at other spatial frequencies. The findings of the current study are discussed in terms of a network of feature integrators in the human visual system.

© 2007 Optical Society of America

OCIS Codes
(330.1880) Vision, color, and visual optics : Detection
(330.5020) Vision, color, and visual optics : Perception psychology
(330.5510) Vision, color, and visual optics : Psychophysics

ToC Category:
Vision and Color

History
Original Manuscript: November 7, 2006
Revised Manuscript: February 6, 2007
Manuscript Accepted: February 16, 2007
Published: June 13, 2007

Virtual Issues
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Bruce C. Hansen and Robert F. Hess, "Structural sparseness and spatial phase alignment in natural scenes," J. Opt. Soc. Am. A 24, 1873-1885 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-7-1873

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