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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. 2, Iss. 5 — May. 17, 2007

Efficiency of the human observer for detecting a Gaussian signal at a known location in non-Gaussian distributed lumpy backgrounds

Subok Park, Brandon D. Gallas, Aldo Badano, Nicholas A. Petrick, and Kyle J. Myers  »View Author Affiliations


JOSA A, Vol. 24, Issue 4, pp. 911-921 (2007)
http://dx.doi.org/10.1364/JOSAA.24.000911


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Abstract

A previous study [J. Opt. Soc. Am. A 22, 3 (2005)] has shown that human efficiency for detecting a Gaussian signal at a known location in non-Gaussian distributed lumpy backgrounds is approximately 4%. This human efficiency is much less than the reported 40% efficiency that has been documented for Gaussian-distributed lumpy backgrounds [ J. Opt. Soc. Am. A 16, 694 (1999) and J. Opt. Soc. Am. A 18, 473 (2001) ]. We conducted a psychophysical study with a number of changes, specifically in display-device calibration and data scaling, from the design of the aforementioned study. Human efficiency relative to the ideal observer was found again to be approximately 5%. Our variance analysis indicates that neither scaling nor display made a statistically significant difference in human performance for the task. We conclude that the non-Gaussian distributed lumpy background is a major factor in our low human-efficiency results.

© 2007 Optical Society of America

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

ToC Category:
Vision and color

History
Original Manuscript: March 3, 2006
Revised Manuscript: November 22, 2006
Manuscript Accepted: November 28, 2006
Published: March 14, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Subok Park, Brandon D. Gallas, Aldo Badano, Nicholas A. Petrick, and Kyle J. Myers, "Efficiency of the human observer for detecting a Gaussian signal at a known location in non-Gaussian distributed lumpy backgrounds," J. Opt. Soc. Am. A 24, 911-921 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-24-4-911

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