35 search results - page 4 / 7 » Computing the antipenumbra of an area light source |
CVPR
2007
IEEE
14 years 9 months ago
2007
IEEE
Creating uniform lighting for archival-quality document acquisition remains a non-trivial problem. We propose a novel method for automatic photometric correction of nonplanar docu...
CGF
2005
13 years 7 months ago
2005
We present a novel algorithm for rendering physically-based soft shadows in complex scenes. Instead of casting shadow rays, we place both the points to be shaded and the samples o...
ICPR
2000
IEEE
14 years 8 months ago
2000
IEEE
This paper describes a new method to recover the sign of the local Gaussian curvature at each point on the visible surface of a 3-D object. Multiple (p > 3) shaded images are a...
SIGGRAPH
1999
ACM
13 years 11 months ago
1999
ACM
In this paper we present a technique for computing the direct lighting in a three-dimensional scene containing area light sources. Our method correctly handles partial visibility ...
CVPR
2008
IEEE
13 years 8 months ago
2008
IEEE
We present a recursive algorithm for 3D surface reconstruction based on Photometric Stereo in the presence of highlights, and self and cast shadows. We assume that the surface re�...