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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. 3, Iss. 1 — Jan. 29, 2008

Channelized-ideal observer using Laguerre–Gauss channels in detection tasks involving non-Gaussian distributed lumpy backgrounds and a Gaussian signal

Subok Park, Harrison H. Barrett, Eric Clarkson, Matthew A. Kupinski, and Kyle J. Myers  »View Author Affiliations


JOSA A, Vol. 24, Issue 12, pp. B136-B150 (2007)
http://dx.doi.org/10.1364/JOSAA.24.00B136


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Abstract

We investigate a channelized-ideal observer (CIO) with Laguerre–Gauss (LG) channels to approximate ideal-observer performance in detection tasks involving non-Gaussian distributed lumpy backgrounds and a Gaussian signal. A Markov-chain Monte Carlo approach is employed to determine the performance of both the ideal observer and the CIO using a large number of LG channels. Our results indicate that the CIO with LG channels can approximate ideal-observer performance within error bars, depending on the imaging system, object, and channel parameters. The CIO also outperforms a channelized-Hotelling observer using the same channels. In addition, an alternative approach for estimating the CIO is investigated. This approach makes use of the characteristic functions of channelized data and employs an approximation method to the area under the receiver operating characteristic curve. The alternative approach provides good estimates of the performance of the CIO with five LG channels. However, for large channel cases, more efficient computational methods need to be developed for the CIO to become useful in practice.

© 2007 Optical Society of America

OCIS Codes
(110.3000) Imaging systems : Image quality assessment
(330.1880) Vision, color, and visual optics : Detection
(330.6100) Vision, color, and visual optics : Spatial discrimination

History
Original Manuscript: March 1, 2007
Revised Manuscript: July 23, 2007
Manuscript Accepted: July 31, 2007
Published: October 12, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Subok Park, Harrison H. Barrett, Eric Clarkson, Matthew A. Kupinski, and Kyle J. Myers, "Channelized-ideal observer using Laguerre-Gauss channels in detection tasks involving non-Gaussian distributed lumpy backgrounds and a Gaussian signal," J. Opt. Soc. Am. A 24, B136-B150 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-24-12-B136

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