基于小波变换和中值滤波的InSAR干涉图像滤波方法  

An Algorithm of Interferometric Phase Filter of In SAR Based on Wavelet Analysis and Median Filter Algorithm

作　　者：汪鲁才[1] 王耀南[1] 毛六平[1] 

机构地区：[1]湖南大学电气与信息工程学院

出　　处：《测绘学报》2005年第2期108-112,共5页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金资助项目(60375001);德国科学研究基金(DFG)资助项目;湖南省自然科学基金资助项目(04JJ40042)

摘　　要：介绍小波分析的基本理论和利用小波分析对信号进行消除噪声的基本方法,以及In SAR干涉相位图像中噪声的特点。针对目前普遍采用的均值滤波和中值滤波等方法对InSAR干涉相位图像中噪声进行滤波的局限性,提出一种基于小波分析和中值滤波相结合的InSAR干涉相位图滤波算法以改善滤波效果。实验证明该算法的有效性。The basic theory of wavelet analysis and the methods of noise elimination for signals with wavelet analysis are introduced, and the characteristics of noise in phase interferogram are dissertated. The average-value-filter and the median-value-filter are employed usually in phase interferogram, and the result was not satisfactory. An algorithm of interferometric phase filter of InSAR based on wavelet analysis and median filter algorithm is advanced to improve the result, and experiments demonstrated the validity of the algorithm.

关 键 词：INSAR 中值滤波 滤波方法 干涉图像 小波变换 小波分析 干涉相位图 消除噪声 均值滤波 滤波效果 滤波算法 实验证明 位图像 局限性 信号 

分 类 号：TN958[电子电信—信号与信息处理] TP391.41[电子电信—信息与通信工程]