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SAR图像的MMSE降斑算法研究

RESEARCH ON MMSE DESPECKLING ALGORITHMS FOR SAR IMAGE
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摘要 合成孔径雷达(SAR)图像由于相干成像方式产生斑点,严重干扰人们对图像的解译。所提系统总结了基于最小均方误差(MMSE)准则的SAR图像降斑算法,包括Lee滤波、Kuan滤波和Frost滤波,分析了它们在斑点抑制和边缘保持两方面的特性。仿真图像和真实SAR图像的降斑实验表明,Frost滤波算法同时考虑滑动窗内的统计特性和结构信息,因此优于其它滤波算法。 Speckle appears in synthetic aperture radar (SAR) images owing to the coherent imaging system, and it hinders human' s observer from analysing features of image. The despeckling algorithms for SAR image based on minimum mean square error (MMSE) criteria are systematically summarised, including the Lee filter, the Kuan filter, and the Frost filter, and their properties in two aspects of noise suppression and edge preserving are analysed as well. Despeckling experiments on simulated and real SAR images show that the Frost filter considers local statistics and structural information in sliding window, so is superior to other filtering algorithms.
作者 孙增国
出处 《计算机应用与软件》 CSCD 北大核心 2012年第7期18-21,共4页 Computer Applications and Software
基金 国家自然科学基金项目(61102163 60805021 61175121) 教育部新世纪优秀人才支持计划项目(NCET-10-0117) 福建省自然科学基金项目(2011J01349) 福建省高等学校杰出青年科研人才培育计划项目(JA10006) 华侨大学基本科研业务费专项基金项目(JB-SJ1003) 华侨大学科研基金项目(09HZR15) 华侨大学高层次人才科研启动费项目(11BS212)
关键词 合成孔径雷达图像 斑点 降斑算法 斑点抑制 边缘保持 Synthetic aperture radar images Speckle Despeckling algorithms Noise suppression Edge preserving
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参考文献9

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