An Efficient Tomographic Inversion Approach for Urban Mapping Using Meter Resolution SAR Image Stacks
An Efficient Tomographic Inversion Approach for Urban Mapping Using Meter Resolution SAR Image Stacks
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DOI：
10.1109/lgrs.2013.2290833
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发表时间：
2014-07-01
影响因子：
4.8
通讯作者：
Bamler, Richard
中科院分区：
文献类型：
--
作者：
Wang, Yuanyuan;Zhu, Xiao Xiang;Bamler, Richard
本文介绍了一种有效的多维合成孔径雷达（SAR）城市测绘成像方法。所提出的方法是一个集成的层析SAR反演和著名的持久散射体干涉（PSI）。它包括三个步骤：首先，使用有效的算法，如PSI的地形和运动参数的全局估计;第二，单和双散射体的判别步骤的基础上的第一步的结果;最后，层析SAR反演，这是预分类的双散射体上执行，使用在第一步中获得的先验知识，检索的地形和运动参数的两个散射体。所提出的方法已经过测试，十几个TerraSAR-X高分辨率的聚光灯图像堆栈。在这封信中，来自拉斯维加斯和柏林的例子。该结果与通过计算最昂贵的层析成像SAR算法（例如，SL 1 MMER），并将计算时间节省50倍。
This letter describes an efficient approach of multidimensional synthetic aperture radar (SAR) imaging for urban mapping. The proposed approach is an integration of tomographic SAR inversion and the well-known persistent scatterer interferometry (PSI). It consists of three steps: first, a global estimation of the topography and motion parameters using efficient algorithms such as PSI; second, a single and double scatterer discrimination step based on the results of the first step; finally, a tomographic SAR inversion, which is performed on the preclassified double scatterers, using the prior knowledge obtained in the first step, retrieving the topography and motion parameters of both scatterers. The proposed approach has been tested on a dozen of TerraSAR-X high-resolution spotlight image stacks. In this letter, examples from Las Vegas and Berlin are presented. The results are comparable with the one obtained by the most computationally expensive tomographic SAR algorithms (e.g., SL1MMER) only and saves computational time by a factor of 50.