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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 13 — Dec. 2, 2009

Pattern recognition in correlated and uncorrelated noise

Brianna Conrey and Jason M. Gold  »View Author Affiliations


JOSA A, Vol. 26, Issue 11, pp. B94-B109 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000B94


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Abstract

This study examined how correlated, or filtered, noise affected efficiency for recognizing two types of signal patterns, Gabor patches and three-dimensional objects. In general, compared with the ideal observer, human observers were most efficient at performing tasks in low-pass noise, followed by white noise; they were least efficient in high-pass noise. Simulations demonstrated that contrast-dependent internal noise was likely to have limited human performance in the high-pass conditions for both signal types. Classification images showed that observers were likely adopting different strategies in the presence of low-pass versus white noise. However, efficiencies were underpredicted by the linear classification images and asymmetries were present in the classification subimages, indicating the influence of nonlinear processes. Response consistency analyses indicated that lower contrast-dependent internal noise contributed somewhat to higher efficiencies in low-pass noise for Gabor patches but not objects. Taken together, the results of these experiments suggest a complex interaction among signals, external noise spectra, and internal noise in determining efficiency in correlated and uncorrelated noise.

© 2009 Optical Society of America

OCIS Codes
(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: April 1, 2009
Revised Manuscript: August 14, 2009
Manuscript Accepted: September 8, 2009
Published: October 15, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Citation
Brianna Conrey and Jason M. Gold, "Pattern recognition in correlated and uncorrelated noise," J. Opt. Soc. Am. A 26, B94-B109 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-26-11-B94

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