1. A computerm with eyes and ears;McCarthy,1968
2. Scene analysis using regions;Brice;S.R,I. Artificial Intelligence Group, Technical Note 17,1970
3. Extraction of the line drawing of 3-dimensional objects by sequential lighting from multidirections;Shirai,1970
4. Artificial inteligence and inteligent automata;Minsk,1970
5. Processing visual data with an automaton eye;Forsen,1968