An improved InSAR image registration algorithm

A novel method is proposed as coarse coregistration, part of InSAR image registration. Edge detection of sar image is processed and control point selection is done subsequently. Then, control points selected in two images are matched and filtered using R-RANSAC method, so as to form tie points. From the tie points, warp function parameters are estimated, and coarse coregistration is finished. Based on coarse coregistration, fine coregistration can be carried out by performing correlation method on oversampled images. Experiments prove that the method is suitable for InSAR, and may enhance the coregistration procedure.