1. Use of the Hough transformation to detect lines and curves in pictures;Duda;Comm. Assoc. Comput. Mach.,1972
2. Pattern Recognition and Scene Analysis;Duda,1973
3. Edge detection in simple scenes using a priori information;Griffith;IEEE Trans. Computers,1973
4. Method and means for recognizing complex patterns;Hough,1962
5. An operator which locates edges in digitized pictures;Hueckel;J. Assoc. Comput. Mach.,1971