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�������պ����ѧѧ�� 2001, Vol. 27 Issue (6) :713-716    DOI:
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Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters
MA Zuo-min, MAO Shi-yi, LIU Xiang-lin*
Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering

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Abstract�� From the stochastic process point of view, Synthetic Aperture Radar (SAR) images are divided into four cases as stationary within resolution cell, nonstationary within resolution cell, stationary within local processing window and nonstationary within local processing window according to their stationarities. Then the influence of nonstationarity on multiplicative noise model of speckle, scene-speckle product model and structured neighborhood model are investigated, stationarity satisfactory conditions of these models are derived respectively. The performances of various kinds of de-speckling filters are re-assessed based on the above analyses, and filtering results of real imagery are given.
Keywords�� synthetic aperture radar   stationary   filter   simulated annealing     
Received 2000-04-24;
Fund:

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������, ëʿ��, ������.SARͼ���ƽ���Զ�ͼ��ģ�ͺ��˲����뷽����Ӱ��[J]  �������պ����ѧѧ��, 2001,V27(6): 713-716
MA Zuo-min, MAO Shi-yi, LIU Xiang-lin.Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2001,V27(6): 713-716
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