Title :
Local shape approximation from shading
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Abstract :
Exact shape cannot be inferred from a local analysis of shading, but for shape interpolation, a crude local approximation may be sufficient. The author explores the limits of such local approximations that are easy to compute. In particular, the shape of shading is used to approximate the surface in areas of monotonic change of intensity. This analysis is complemented by a method to compute the direction of a single point light source from the shading on occluding contours
Keywords :
approximation theory; computer vision; image recognition; interpolation; lighting; exact shape; light source; local shape approximation; monotonic change of intensity; occluding contours; shading shape; shape interpolation; Approximation algorithms; Cameras; Interpolation; Iterative algorithms; Layout; Light sources; Robustness; Shape;
Conference_Titel :
Computer Vision and Pattern Recognition, 1992. Proceedings CVPR '92., 1992 IEEE Computer Society Conference on
Conference_Location :
Champaign, IL
Print_ISBN :
0-8186-2855-3
DOI :
10.1109/CVPR.1992.223192
