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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: Franco Gori
  • Vol. 31, Iss. 5 — May. 1, 2014
  • pp: 1112–1117

Numerical stability issues on channelized Hotelling observer under different background assumptions

Di Ge, Lu Zhang, Christine Cavaro-Ménard, and Patrick Le Callet  »View Author Affiliations


JOSA A, Vol. 31, Issue 5, pp. 1112-1117 (2014)
http://dx.doi.org/10.1364/JOSAA.31.001112


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Abstract

This paper addresses the numerical stability issue on the channelized Hotelling observer (CHO). The CHO is a well-known approach in the medical image quality assessment domain. Many researchers have found that the detection performance of the CHO does not increase with the number of channels, contrary to expectation. And to our knowledge, nobody in this domain has found the reason. We illustrated that this is due to the ill-posed problem of the scatter matrix and proposed a solution based on Tikhonov regularization. Although Tikhonov regularization has been used in many other domains, we show in this paper another important application of Tikhonov regularization. This is very important for researchers to continue the CHO (and other channelized model observer) investigation with a reliable detection performance calculation.

© 2014 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(110.2960) Imaging systems : Image analysis
(110.2970) Imaging systems : Image detection systems
(110.3000) Imaging systems : Image quality assessment
(330.1880) Vision, color, and visual optics : Detection
(330.5510) Vision, color, and visual optics : Psychophysics

ToC Category:
Imaging Systems

History
Original Manuscript: November 19, 2013
Revised Manuscript: April 1, 2014
Manuscript Accepted: April 2, 2014
Published: April 30, 2014

Virtual Issues
Vol. 9, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Di Ge, Lu Zhang, Christine Cavaro-Ménard, and Patrick Le Callet, "Numerical stability issues on channelized Hotelling observer under different background assumptions," J. Opt. Soc. Am. A 31, 1112-1117 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-5-1112

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