1. Ordered search techniques in template matching;Nagel,1972
2. Coarse-fine template matching;Rosenfeld;IEEE Trans. Systems Man Cybern.,1977
3. Two-stage template matching;VanderBrug;IEEE Trans. Comput.,1977
4. A glance at image analysis - How the robot sees;Davies;Chartered Mech. Engineer,1984
5. Method and means for recognising complex patterns;Hough;US Patent 3069654,1962