A New Image Registration Method for Repeat-Pass InSAR Based on Fourier-Mellin Transformation and Correlation-Coefficient Algorithm
Shi Xiao-jin①②; Zhang Yun-hua①
①Center for Space Science and Applied Research, CAS, Beijing 100190, China;②Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Abstract：Compared with one pass InSAR system with two antennae, the registration of image pair of repeat-pass InSAR system is much more difficult due to parallel tracks are usually not guaranteed. In this paper, a new image co-registration algorithm for repeat-pass InSAR, which combines the Fourier-Mellin transform and correlation-coefficient algorithm, is proposed to perform accurate co-registration for complex image pair having rotation angle due to unparallel tracks. When the method is used as coarse co-registration step, a nonlinear amplitude transformation is introduced as pre-processing to overcome the failure of Fourier-Mellin transformation method in case of image pair with large dynamic amplitude range and non-uniform amplitude distribution, and when used as fine co-registration step, correlation-coefficient algorithm is incorporated to accurately estimate the small rotation angle between image pair. SIR-C/X X-band experimental data are used to test the proposed algorithm through comparing with traditional correlation-coefficient algorithm in both accuracy and run time. The experimental results prove the effectiveness of the proposed algorithm.
石晓进; 张云华. 基于Fourier-Mellin变换和相干系数法的重复轨道干涉SAR图像配准新方法[J]. 电子与信息学报, 2009, 31(4): 803-807 .
Shi Xiao-jin①②; Zhang Yun-hua①. A New Image Registration Method for Repeat-Pass InSAR Based on Fourier-Mellin Transformation and Correlation-Coefficient Algorithm. , 2009, 31(4): 803-807 .
2009, Vol. 31 
