Image registration algorithm based on point features of sub-pixel

Image registration technology is getting more and more important in nowadays. The accuracy of the registration resolution plays an important. In this passage, we present an image registration algorithm based on point feature of sub-pixel, which can improve the accuracy. Firstly we use Harris corner point algorithm to get point features, then we use our method to refine the Harris points, after that we use these points as GCPs and register the two images. Finally we find that our image registration algorithm has a better accuracy than the image registration.