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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. 6 — Jun. 1, 2006
  • pp: 1269–1281

Scene estimation from speckled synthetic aperture radar imagery: Markov-random-field approach

Ousseini Lankoande, Majeed M. Hayat, and Balu Santhanam  »View Author Affiliations


JOSA A, Vol. 23, Issue 6, pp. 1269-1281 (2006)
http://dx.doi.org/10.1364/JOSAA.23.001269


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Abstract

A novel Markov-random-field model for speckled synthetic aperture radar (SAR) imagery is derived according to the physical, spatial statistical properties of speckle noise in coherent imaging. A convex Gibbs energy function for speckled images is derived and utilized to perform speckle-compensating image estimation. The image estimation is formed by computing the conditional expectation of the noisy image at each pixel given its neighbors, which is further expressed in terms of the derived Gibbs energy function. The efficacy of the proposed technique, in terms of reducing speckle noise while preserving spatial resolution, is studied by using both real and simulated SAR imagery. Using a number of commonly used metrics, the performance of the proposed technique is shown to surpass that of existing speckle-noise-filtering methods such as the Gamma MAP, the modified Lee, and the enhanced Frost.

© 2006 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(100.0100) Image processing : Image processing
(110.0110) Imaging systems : Imaging systems
(280.0280) Remote sensing and sensors : Remote sensing and sensors

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: June 1, 2005
Revised Manuscript: November 21, 2005
Manuscript Accepted: December 18, 2005

Citation
Ousseini Lankoande, Majeed M. Hayat, and Balu Santhanam, "Scene estimation from speckled synthetic aperture radar imagery: Markov-random-field approach," J. Opt. Soc. Am. A 23, 1269-1281 (2006)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-6-1269

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