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。
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.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第11期1400-1403,共4页
Journal of Hefei University of Technology：Natural Science
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
wavelet transform
spatial orientation tree structure
synthetic aperture radar
speckle
soft-thresholding
