地基InSAR干涉图像相位滤波算法  

Phase Filtering Algorithm of InSAR Interferogram

作　　者：冯丽源 聂祥飞[1] 张月 杨鸿 梁阳 陈天扬 FENG Liyuan;NIE Xiangfei;ZHANG Yue;YANG Hong;LIANG Yang;CHEN Tianyang(College of Electronics and Information Engineering,Chongqing Three Gorges University,Chongqing 404000,China)

机构地区：[1]重庆三峡学院电子与信息工程学院,重庆404000

出　　处：《北京测绘》2020年第12期1804-1809,共6页Beijing Surveying and Mapping

摘　　要：地基SAR在对边坡进行形变监测过程中,为获得较高的图像质量,往往要对干涉相位进行滤波优化,以提升干涉相位图的信噪比,降低干涉相位图中残差点的个数,从而有助于更好地进行相位解缠。本文系统分析了常用的相位滤波算法,并对算法的优缺点进行了深入讨论,采用实测数据进行对比实验。实验结果表明,中值滤波对地势陡峭地区的噪声滤除效果明显,均值滤波对平坦地区的滤波效果较好,圆周期中值滤波能有效抑制斑点噪声,具有较好的相位保持能力。In the process of deformation monitoring of slope by ground-based SAR,in order to obtain higher image quality,it is often necessary to filter and optimize the interference phase,so as to improve the signal-to-noise ratio of the interferogram and reduce the number of residual points in the interferogram,which is helpful for better phase unwrapping.In this paper,the commonly used phase filtering algorithm is systematically analyzed,and the advantages and disadvantages of the algorithm are discussed in depth.The comparison experiment is carried out with the measured data.The experimental results show that the median filter has a good filtering effect on the steep terrain,the average filter has a good filtering effect on the flat area,the circle median filter can effectively suppress the speckle noise,and has a good phase keeping ability.

关 键 词：合成孔径雷达干涉技术(InSAR) 干涉相位图 相位滤波 

分 类 号：P217[天文地球—测绘科学与技术]