| 基于小波域中SOT结构的SAR相干斑抑制 |
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| 引用本文： | 朱家兵,陶亮,洪一. 基于小波域中SOT结构的SAR相干斑抑制[J]. 合肥工业大学学报(自然科学版), 2006, 29(11): 1400-1403 |
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| 作者姓名： | 朱家兵 陶亮 洪一 |
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| 作者单位： | 华东电子工程研究所,信号处理研究室,安徽,合肥,230031;安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039;安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039 |
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| 摘 要： | 论述了在小波域中通过空间向树结构对合成孔径雷达(SAR)图像相干斑噪声的抑制。首先从SAR图像相干斑噪声产生的机理出发,论述了采用传统滤波方法去除SAR图像中相干斑噪声的局限性以及在小波变换域中如何通过空间向树结构对相干斑噪声进行有效的滤波;实验结果表明,此方法对SAR图像相干斑噪声有良好的抑制作用,同时还尽可能多保留目标的纹理细节。
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| 关 键 词： | 小波变换 空间向树结构 合成孔径雷达 相干斑噪声 软阈值 |
| 文章编号： | 1003-5060(2006)11-1400-04 |
| 修稿时间： | 2005-11-10 |
Speckle reduction in SAR images based on the SOT structure in the wavelet domain |
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| ZHU Jia-bing,TAO Liang,HONG Yi. Speckle reduction in SAR images based on the SOT structure in the wavelet domain[J]. Journal of Hefei University of Technology(Natural Science), 2006, 29(11): 1400-1403 |
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| Authors: | ZHU Jia-bing TAO Liang HONG Yi |
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| Abstract: | This paper mainly deals with speckle reduction in SAR images based on the spatial orientation tree structure in the wavelet domain.The reason of generating speckles in SAR images is interpreted,and the disadvantages of speckle reduction based on conventional methods are discussed,and then it is expounded in detail how to filter the speckles by the spatial orientation tree(SOT) structure in the wavelet domain.Experiment results have shown that the performance of the filter is satisfactory in both reducing speckles and edge preservation. |
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| Keywords: | wavelet transform spatial orientation tree structure synthetic aperture radar speckle soft-thresholding |
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