| SAR图像非平稳性对图像模型和滤波降噪方法的影响 |
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| 引用本文： | 马作民,毛士艺,刘祥林. SAR图像非平稳性对图像模型和滤波降噪方法的影响[J]. 北京航空航天大学学报, 2001, 27(6): 713-716 |
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| 作者姓名： | 马作民 毛士艺 刘祥林 |
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| 作者单位： | 北京航空航天大学 电子工程系 |
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| 基金项目： | 国家自然科学基金;69831040; |
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| 摘 要： | 从随机过程理论角度按平稳程度把合成孔径雷达(SAR)图像分为分辨单元内平稳、分辨单元内不平稳、处理窗内局部平稳和处理窗内局部不平稳4种情况,研究了非平稳性对图像的斑点乘性噪声模型、场景-斑点乘积模型和结构邻域模型的影响,得出各自的平稳性适用条件,并在此基础上评价了各种滤波降噪方法的性能,用实际数据进行了验证.
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| 关 键 词： | 合成孔径雷达 平稳 滤波器 模拟退火 |
| 文章编号： | 1001-5965(2001)06-0713-04 |
| 收稿时间： | 2000-04-24 |
| 修稿时间： | 2000-04-24 |
Influence of Nonstationarity on SAR Imagery Models and De-Speckling Filters |
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| 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 Astronautics, 2001, 27(6): 713-716 |
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| Authors: | MA Zuo-min MAO Shi-yi LIU Xiang-lin |
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| Affiliation: | 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. |
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| Keywords: | synthetic aperture radar stationary filter simulated annealing |
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