1. Locating Intensity Changes in Digitized Visual Scenes;Brooks,1976
2. Edge and Line Detection in ERTS Imagery: A Comparative Study;Eberlein,1974
3. Mathlab;Engelman,1971
4. On Boundary Detection;Herskovits,1970
5. An operator which locates edges in digitized pictures;Hueckel;J. Assoc. Comput. Mach.,1971