Abstract: It is hard to rectify accurately the dynamic images online because of the big errors resulting from the difficult automatic pick-up of control points in the rectification process of unavoidable anamorphic images by camera. Taking account of the limitation of existing pick-up methods, an approach to well-matched high robust pick-up of control points was proposed for the rectification, which can implement the automatic, accurate and robust pick-up of control points through developing a polynomial mapping model with optimum polynomial degree for both anamorphic and original images, thus rectifying those images via bilinear interpolation. The application results show that the method can rectify the image quickly and accurately. It can yield accurate correction results of which error is only 0.037 pixel.