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中文摘要：
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。
英文摘要：
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.
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