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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: Stephen A. Burns
  • Vol. 23, Iss. 2 — Feb. 1, 2006
  • pp: 272–278

Methods to detect objects in photon-limited images

Ahmad Abu-Naser, Nikolas P. Galatsanos, and Miles N. Wernick  »View Author Affiliations


JOSA A, Vol. 23, Issue 2, pp. 272-278 (2006)
http://dx.doi.org/10.1364/JOSAA.23.000272


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Abstract

We investigate the problem of detecting and localizing a known signal in a photon-limited image, where Poisson noise is the dominant source of image degradation. For this purpose we developed and evaluated three new algorithms. The first two are based on the impulse restoration (IR) principle and the third is based on the generalized likelihood ratio test (GLRT). In the IR approach, the problem is formulated as one of restoring a delta function at the location of the desired object. In the GLRT approach, which is a well-known variation on the optimal likelihood ratio test, the problem is formulated as a hypothesis testing problem, in which the unknown background intensity of the image and the intensity scale of the object are obtained by maximum-likelihood estimation. We used Monte Carlo simulations and localization receiver operating characteristic (LROC) curves to evaluate the proposed algorithms quantitatively. LROC curves demonstrate the ability of an algorithm to detect and locate objects in a scene correctly. Our simulations demonstrate that the GLRT approach is superior to all other tested algorithms.

© 2006 Optical Society of America

OCIS Codes
(100.2960) Image processing : Image analysis
(100.5010) Image processing : Pattern recognition

ToC Category:
Image Processing

History
Original Manuscript: January 7, 2005
Revised Manuscript: April 29, 2005
Manuscript Accepted: May 8, 2005

Citation
Ahmad Abu-Naser, Nikolas P. Galatsanos, and Miles N. Wernick, "Methods to detect objects in photon-limited images," J. Opt. Soc. Am. A 23, 272-278 (2006)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-2-272


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