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《Acta Optica Sinica》 2009-10
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The Coherent Speckle Suppression Method in SAR image Based on Contourlet Domain Adaptive BivaShrink Model

Wang Wenbo1 Zhang Xiaodong2 Fei Pusheng3 Yi Xuming3 1Department of Information and Computing Science,Wuhan University of Science and Technology,Wuhan,Hubei 430065,China 2State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing,Wuhan University,Wuhan,Hubei 430079,China 3Mathematic and Statistic School,Wuhan University,Wuhan,Hubei 430072,China  
In order to preserve the textural feature affected by multiplicative speckle in high resolution synthetic aperture radar(SAR) images,a despeckling metod,based on contourlet domain adaptive BivaShrink denoising model,is proposed to suppress the speckle in SAR images.By calculating the variance homogeneous measurement and local energy ratio,the shape and size of variance estimating windows are determined adaptively,and then the variance of original images can be estimated optimally.Expriments show that the proposed algorithm performs better on not only speckle reduction but also preservation of structural detail information than wavelet BivaShrink algorithm and contourlet threshold algorithm.Visual effect and experimental numerical index both are improved apparently.
【Fund】: 国家自然科学基金(70771080);; 湖北省教育厅科学基金(B20071103)资助课题
【CateGory Index】: TN957.52
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