基于PolInSAR三分量分解的建筑物高度向信息提取方法  

Building height information extraction method based on three-component decomposition for PolISAR Data

作　　者：王萍[1] 汪长城[1] 彭星[1] 李宁[1] 李鹏飞[1] 

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《测绘工程》2014年第6期16-20,26,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41371335);国家863计划资助项目(2012AA121301);湖南省自然科学基金资助项目(12JJ4035);测绘遥感信息工程国家重点实验室开放基金资助项目(11R03)

摘　　要：传统的基于InSAR提取建筑物高程的方法难以区分同一分辨单元内不同散射体的高度信息。文中提出一种基于PolInSAR Freeman三分量分解的城市建筑物高度向信息提取方法,可有效获取同一分辨单元内不同散射体的散射中心。首先对极化干涉互协方差矩阵进行Freeman三分量分解,分离不同散射机制对应的相位中心,然后根据相位信息重建建筑物三维模型。利用覆盖美国加州Richmond地区的两景高分辨率TerraSAR-X极化SAR数据进行实验,结果表明,PolInSAR三分量分解能够分离同一散射单元内不同散射体的相位中心,从而有效提取出建筑物高度向信息及其三维模型。Traditional building height extraction method based on InSAR technique is difficult to separatethe height of different scattering mechanisms in one resolution element. A building height inversionmethod is proposed based on PollnSAR Freeman three componenl decomposition method, which canseparate the scattering centers of different scattering mechanisms in one resolution element. First, thePolInSAR cross correlation matrix is decomposed to three components, seperating three different phasecorresponding centers. Then the three dimensional model of buildings is rebuilt. The proposed method hasbeen tested by the high resolution full polarization TerraSAR-X data covered Richmond, California, USA.Experimental results indicate that PolInSAR Freeman decomposition can separate different scatteringmechanisms in one resolution element, and can effectively extract the height information and 3D model ofbuildings.

关 键 词：三分量分解 散射机制 建筑物 三维模型 

分 类 号：TN958[电子电信—信号与信息处理]