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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

  • Vol. 11, Iss. 5 — May. 1, 1994
  • pp: 1599–1609

Optimal correlation filters for images with signal-dependent noise

John D. Downie and John F. Walkup  »View Author Affiliations


JOSA A, Vol. 11, Issue 5, pp. 1599-1609 (1994)
http://dx.doi.org/10.1364/JOSAA.11.001599


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Abstract

We address the design of optimal correlation filters for pattern detection and recognition in the presence of signal-dependent image noise sources. The particular examples considered are film-grain noise and speckle. Two basic approaches are investigated: (1) deriving the optimal matched filters for the signal-dependent noise models and comparing their performances with those derived for traditional signal-independent noise models and (2) first nonlinearly transforming the signal-dependent noise to signal-independent noise followed by the use of a classical filter matched to the transformed signal. We present both theoretical and computer simulation results that demonstrate the generally superior performance of the second approach in terms of the correlation peak signal-to-noise ratio.

© 1994 Optical Society of America

History
Original Manuscript: August 6, 1993
Revised Manuscript: October 20, 1993
Manuscript Accepted: October 20, 1993
Published: May 1, 1994

Citation
John D. Downie and John F. Walkup, "Optimal correlation filters for images with signal-dependent noise," J. Opt. Soc. Am. A 11, 1599-1609 (1994)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-11-5-1599

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