可靠性排序在InSAR相位展开中的应用  

Reliability-ordering Phase Unwrapping Algorithm and Its Application in InSAR

作　　者：宋芳[1] 苏显渝[1] 

机构地区：[1]四川大学电子信息学院

出　　处：《光电子．激光》2005年第1期9-13,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金与中国工程物理研究院联合基金资助项目(10376018)

摘　　要：提出一种基于可靠性排序的相位展开算法。这种算法的关键是选择相干图来标识相位数据的可靠性,相位展开的路径由相干图导向。阐述了可靠性排序测量的基本原理,讨论了算法设计和流程图,针对干涉合成孔径雷达(InSAR)获得的数据进行了相位展开处理,得出了较为理想的结果。实验表明,相位展开的路径总是沿着具有较高可靠性的像素到较低可靠性的像素,所以在最坏的情况下误差也被限制在局部最小区域。A new phase unwrapping algorithm based on reliability ordering was proposed. The key of the algorithm is to point out the dependability of data by choosing coherence maps. The way for phase unwrapping is guided by coherence maps. The fundamental rule of reliability ordering was elaborated, and the algorithm design and the flow diagram were discussed. The phase data obtained by the interferometer synthetic aperture radar (InSAR) had been unwrapped, and we obtained the relatively ideal results. The experiments indicate that the way of phase unwrapping is always from the high dependability pixels to the low dependability pixels. Therefore in the worst instance, the errors are limited in the smallest local region to a large degree.

关 键 词：相位展开 SAR 干涉合成孔径雷达 高可靠性 像素 算法设计 数据 排序 路径 流程图 

分 类 号：TN958[电子电信—信号与信息处理] TN957.52[电子电信—信息与通信工程]