Title :
Improved shape-from-shading using Darboux smoothing
Author :
Ragheb, Hossein ; Hancock, Edwin R.
Author_Institution :
Dept. of Comput. Sci., York Univ., UK
Abstract :
This paper describes a new surface normal smoothing process which can be used in conjunction with shape-from-shading. Rather than directly smoothing the surface normal vectors, we exert control over their directions by smoothing the field of principal curvature vectors. To do this we develop a topography sensitive smoothing process which overcomes the problems of singularities in the field of principal curvature directions at the locations of umbilics and saddles
Keywords :
image representation; image texture; Darboux smoothing; improved shape-from-shading; principal curvature directions; saddles; surface normal smoothing process principal curvature vectors; topography sensitive smoothing process; umbilics; Boundary conditions; Boundary value problems; Brightness; Computer science; Equations; Psychology; Rendering (computer graphics); Smoothing methods; Surface topography; Surface treatment;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958619
