InSAR干涉图的矢量分离式小波滤波  

Filtering for InSAR Interferograms by Vector Decomposing and Wavelet Transformation

作　　者：靳国旺[1] 韩晓丁[1] 贾博[1] 李豪[1] 

机构地区：[1]信息工程大学测绘学院,郑州市陇海中路66号450052

出　　处：《武汉大学学报（信息科学版）》2008年第2期132-135,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2001AA132011)

摘　　要：提出了一种新的InSAR干涉图滤波方法,并提出采用滤波前后干涉相位的均方差来进行滤波精度评价的策略。对不同类型的多幅干涉图进行了滤波实验,结果表明,本文滤波方法效果较好,精度较高。A new filtering algorithm for InSAR interferogram is proposed. First, the raw intergerogram is mapped to unit vectors. Then the vectors are decomposed to two parts： the sine signal and the cosine one. Secondly, the sine and the cosine signals are filtered by wavelet threshold method. Finally, the filtered interferogram is calculated by the filtered sine and cosine signals. In order to evaluate the precision of filtering, a new evaluation method is presented, which uses the RMS of the phases between interferograms before and after filtering. Different types of interferograms are employed in experiments. The results show that the proposed filtering method is valid.

关 键 词：INSAR 干涉图 小波滤波 矢量分离 

分 类 号：P237.3[天文地球—摄影测量与遥感]