一种新的干涉图质量评定指标研究  

RESEARCH ON A NOVEL INDEX FOR ASSESSMENT OF INTERFEROGRAM QUALITY

作　　者：赵超英[1] 张勤[1] 

机构地区：[1]长安大学地质与测绘学院,西安710054

出　　处：《大地测量与地球动力学》2009年第1期96-100,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40672173);国家自然科学基金重大项目(40534021);国土资源部地质大调查项目(1212010440410)

摘　　要：研究干涉图的质量指标不仅可以评价主从影像的配准精度,而且在干涉图滤波处理时还可以进行滤波因子的计算和滤波效果的评定。基于评价干涉图质量的相位差分和法的基本原理,提出了顾及2π周期性相位差分和指标和以相干值定权的加权相位差分和指标,并通过西安地区DEM干涉图的实例验证了该质量指标的优越性。Interferogram of two coregistrated master and slave images is one of the main products in the SAR interferometric processing, and the filtering of interferogram is a key step for rational unwrapping. So the quality of interferogram can not only be applied to assess the coregistration precision, but also be used to determine the fihering factor and assess the filtering effect. According to the basic principle of the method of sum of phase difference （SPD）, this paper puts forward the phase difference and index with considering the 2π discontinuity and weighted phase difference and index, where the weight is determined by coherence value. This quality map can assess the interferogram with 2π discontinuity and highlight the low coherence area. Finally,the advantage of this quality index is proved by the DEM interferogram of the Xi＇ an area taken as an example.

关 键 词：干涉图 相干图 相位差分和 相位差分加权平均图 质量评定指标 

分 类 号：P228[天文地球—大地测量学与测量工程]