A large width SAR image registration method based on the compelex correlation function
SAR complex image registration is one of the key steps of the interferometirc SAR and tomographic SAR. The complex correlation function based method is an common registration method. Generally in the application, the adopted SAR complex image is large width, however, the complex correlation functions of registration accuracy can only be guaranteed the high precision of a small scale registration in an image. This paper puts forward a complex correlation function based method of large width SAR image. First of all, we take a large width SAR image into blocks, and obtain registered offsets according to the complex correlation functions of every block. And then we advocate ten times interpolation for the master image and the slave image. With the master image as reference, we resample for the slave image according to registered offsets of each block. Finally, we present the detailed steps of registration method. We use The ALOS data for real data processing, and the processing results demonstrate the effective method.