高条纹率InSAR干涉图滤波方法的对比研究  

STUDY ON FILTERING METHODS FOR InSAR INTERFEROGRAM OF HIGH FRINGE RATE

作　　者：尹宏杰[1] 王琪洁[1] 王平[1] 王永哲[1] 

机构地区：[1]中南大学信息物理工程学院,长沙410083

出　　处：《大地测量与地球动力学》2009年第5期138-142,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40774003;40404001);国家863专题(2006AA12Z156);国家西部1:50000空白区测图工程2007年度研究课题;湖南省国土资源厅矿产资源保护与合理开发利用科研项目;中南大学研究生教育创新工程(200955xt173)

摘　　要：探讨复数域均值滤波、圆周期均值滤波、Lee滤波、旋滤波和Goldste in频域滤波方法在高条纹率InSAR干涉图滤波中的效果。对意大利Etna火山真实干涉图的滤波分析表明:在高条纹率情况下,由于受滑动窗口采样的限制,空域滤波都会不同程度地造成干涉条纹的混迭;而Goldste in频域滤波在噪声严重区域并不产生滤波效果,且表现出较好的条纹保持能力,具有很好的保真性和自适应性。The performances of complex domain mean filter, periodic mean filter, Lee filter, spin filter and Goldstein filter for filtering the InSAR interferogram of high fringe rate are studied. Experiment results from real images of Mountain Etna show that in the high fringe rate case, space domain filter algorithm, even the most effective fringe preserving methods, will still make the fringe blur. However, the Goldstein filter, working in frequency domain, can preserve the fringe effectively while still reducing the level of noise. Moreover, the Goldstein filter demonstrates graceful degradation in regions of pure noise, shows great adaptability.

关 键 词：高条纹率 InSAR干涉图 均值滤波 圆周期滤波 噪声 

分 类 号：P227[天文地球—大地测量学与测量工程]