Study on Guidance Algorithm of Scene Matching based on Different Source Images for Cruise Missile

Scene matching guidance based on different source images is one of the most difficult problems that land attack cruise missile faces at the stage of terminal guidance. Usually the reference images are provided by CCD optical equipment of reconnaissance satellite, and real-time images come from infrared seeker of missile, so reference images and real-time images differ extremely in image quality. If the conventional algorithm is applied for scene matching, the matching effect will be bad. So a kind of new scene matching algorithm based on different source images is studied in this paper. First of all, the different source images are preprocessed by the method of edge enhancement. Then the radial projection algorithm is used for coarse image matching. On the basis of coarse matching, the edge features of infrared images and visible images are extracted for fine image matching ulteriorly. With this method of two stages image matching from coarse matching to fine matching, the guidance accuracy of cruise missile is improved greatly, and the matching accuracy is higher when images are different source or rotated.