DocumentCode
3206591
Title
Local shape approximation from shading
Author
Weinshall, D.
Author_Institution
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
fYear
1992
fDate
15-18 Jun 1992
Firstpage
716
Lastpage
718
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;
fLanguage
English
Publisher
ieee
Conference_Titel
Computer Vision and Pattern Recognition, 1992. Proceedings CVPR '92., 1992 IEEE Computer Society Conference on
Conference_Location
Champaign, IL
ISSN
1063-6919
Print_ISBN
0-8186-2855-3
Type
conf
DOI
10.1109/CVPR.1992.223192
Filename
223192
Link To Document