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Proceedings Paper

Polarimetric property preservation in SAR speckle filtering
Author(s): Jong-Sen Lee; Mitchell R. Grunes; Wolfgang-Martin Boerner
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Paper Abstract

Speckle reduction of polarimetric SAR imagery has been studied using several different approaches. All these approaches exploited the degree of independence between HH, HV and VV channels. The statistical characteristics, such as correlation between channels, and polarimetric property preservation, were not addressed. This paper proposes a new approach in polarimetric SAR filtering. The new approach emphasizes not introducing cross-talk, preserving polarimetric information and statistical correlation between channels, and not degrading the image quality. To avoid cross-talk, each element of the covariance matrix has to be filtered independently. This rules out current methods of polarimetric SAR filtering. To preserve the polarimetric signature, each element of the covariance matrix should be filtered in a way similar to multi-look processing by averaging the covariance matrix of neighboring pixels, but without the deficiency of smearing edges, or degrading image quality. The proposed polarimetric SAR filter uses edge- directed non-square windows and applies the local statistics filter. The impact of using this polarimetric speckle filtering on terrain classification is also studied. NASA/JPL Les Landes polarimetric P-Band and C-Band SAR data is used for illustration.

Paper Details

Date Published: 23 December 1997
PDF: 7 pages
Proc. SPIE 3120, Wideband Interferometric Sensing and Imaging Polarimetry, (23 December 1997); doi: 10.1117/12.300624
Show Author Affiliations
Jong-Sen Lee, Naval Research Lab. (United States)
Mitchell R. Grunes, Naval Research Lab. (United States)
Wolfgang-Martin Boerner, Univ. of Illinois/Chicago (United States)

Published in SPIE Proceedings Vol. 3120:
Wideband Interferometric Sensing and Imaging Polarimetry
Harold Mott; Wolfgang-Martin Boerner, Editor(s)

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