1. Grid coding: A preprocessing technique for robot and machine vision;Will;Artif. Intell,1971
2. Shape from Shading: A Method for Obtaining the Shape of a Smooth Opaque Object from One View;Horn,1970
3. Texture gradients as a depth cue;Bajcsy;Comput. Graphics Image Process,1976
4. Surface Perception from Local Analysis of Texture and Contour;Stevens,1979
5. A computational theory of human stereo vision;Marr,1979