1. AI and robotics;Brady,1986
2. Photometric method for determining surface orientation from multiple images;Woodham;Op. Eng.,1980
3. Picking parts out of a bin;Horn,1983
4. Recognition of surface geometry of glossy objects using polarised light;Terashi;JRSJ,1985
5. Perception of shape from shading;Ramachandran;Nature,1988