优化条纹频率估计的改进InSAR-BM3D滤波方法  

Improved InSAR-BM3D filtering algorithm based on optimal fringe frequency estimation

作　　者：李世伟 余洁[1,2,3,4] 朱琳[1,2,3,4] 韩丽华[5] 陈蜜[1,2,3,4] LI Shiwei;YU Jie;ZHU Lin;HAN Lihua;CHEN Mi(College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China;State Key Laboratory Incubation Base of Urban Environmental Processes and Digital Simulation,Capital Normal University,Beijing 100048,China;Key Laboratory of 3-Dimensional Information Acquisition and Application,Ministry of Education,Beijing 100048,China;Key Laboratory of Land Subsidence Mechanism and Mitigation,Ministry of Education,Beijing 100048,China;Land Satellite Remote Sensing Application Center,Ministry of Natural Resources of the People’s Republic of China,Beijing 100048,China)

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]首都师范大学城市环境过程与数字模拟国家重点实验室培育基地,北京100048 [3]首都师范大学三维信息获取与应用教育部重点实验室,北京100048 [4]地面沉降机理与防控教育部重点实验室,北京100048 [5]自然资源部国土卫星遥感应用中心,北京100048

出　　处：《测绘科学》2022年第9期154-162,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41671417)

摘　　要：针对InSAR-BM3D滤波在干涉图条纹密集、噪声严重情况下,存在的对干涉条纹保护较差、易丢失细节信息的问题,该文利用圆周期中值滤波对条纹频率估计方法进行优化以提高条纹频率估计精度,并利用优化的条纹频率方法对InSAR-BM3D滤波方法进行改进。为验证本文改进滤波方法的有效性,分别进行模拟数据与真实数据的滤波实验,并将改进滤波方法与未改进InSAR-BM3D滤波以及常用的Lee滤波、Goldstein滤波、小波硬阈值滤波、小波软阈值滤波进行滤波结果的定性和定量比较。结果表明,改进滤波方法在保持InSAR-BM3D滤波高效抑制噪声优势的同时,提高了对干涉条纹边缘和细节的保护能力,能获得更好的滤波效果。Aiming at the problems of poor interference fringe protection and easy loss of detailed information in InSAR-BM3 D filtering when the interference pattern fringes were dense and the noise was severe,this paper optimized the fringe frequency estimation method by using the circular period median filter to improve the fringe frequency estimation accuracy,and used the optimized fringe frequency method to improve the InSAR-BM3 D filtering method.In order to verify the effectiveness of the improved filtering method in this paper,filtering experiments on simulated data and real data were carried out respectively,and qualitative and quantitative comparisons were made between the improved filtering method and the unimproved InSAR-BM3 D filtering and the commonly used Lee filtering,Goldstein filtering,wavelet hard threshold filtering and wavelet soft threshold filtering.The results showed that the improved filtering method could improve the protection ability of interference fringe edges and details while maintaining the advantage of InSAR-BM3 D filtering to effectively suppress noise,and could obtain better filtering effect.

关 键 词：干涉图滤波 InSAR-BM3D滤波 相位噪声 条纹频率 

分 类 号：TN957.52[电子电信—信号与信息处理] TN713[电子电信—信息与通信工程]