Study and Application of Methods of Remote Sensing Image Registration

Image registration is a fundamental task in image processing,which geometrically matches two or more images taken at different time,from different sensors or from different viewpoints.It is a process of aligning two images into a common coordinate system to monitor and analyze the subtle changes between the two.The image registration methods are mainly divided into two types: spatial domain registration method and frequency domainregistration method.For the processing of series remote sensing images,two representative algorithms of each type were implemented by making the purification to get rid of outliers and Fourier transform in certain neighborhood according to the actual situation,and were compared.The experiment results show that the frequency domain method can achieve more accurate registration.At the end of the paper,the spatial domain algorithm is analysed with respect to the experiment results,and a conclusion is offered.