Abstract: This paper discusses circle images based image conformity. Because of finding matched points between images taken from the same point,it may avoid the problems of lighting changes, occlusion, and aspect changes,than the general point matching problem. A robust way is used in the paper. A few of matching points are used to automatically find more matching points. Projective transformations are solved with the robust way and optimized. When the conformity coefficient is changed, the conformity image corresponding to different view can be obtain.The camera needn't to be calibrated.