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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 30, Iss. 11 — Nov. 1, 2013
  • pp: 2422–2432

Channelized model observer for the detection and estimation of signals with unknown amplitude, orientation, and size

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

JOSA A, Vol. 30, Issue 11, pp. 2422-2432 (2013)

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As a task-based approach for medical image quality assessment, model observers (MOs) have been proposed as surrogates for human observers. While most MOs treat only signal-known-exactly tasks, there are few studies on signal-known-statistically (SKS) MOs, which are clinically more relevant. In this paper, we present a new SKS MO named channelized joint detection and estimation observer (CJO), capable of detecting and estimating signals with unknown amplitude, orientation, and size. We evaluate its estimation and detection performance using both synthesized (correlated Gaussian) backgrounds and real clinical (magnetic resonance) backgrounds. The results suggest that the CJO has good performance in the SKS detection–estimation task.

© 2013 Optical Society of America

OCIS Codes
(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:
Vision, Color, and Visual Optics

Original Manuscript: March 7, 2013
Revised Manuscript: July 1, 2013
Manuscript Accepted: September 19, 2013
Published: October 30, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Lu Zhang, Bart Goossens, Christine Cavaro-Ménard, Patrick Le Callet, and Di Ge, "Channelized model observer for the detection and estimation of signals with unknown amplitude, orientation, and size," J. Opt. Soc. Am. A 30, 2422-2432 (2013)

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