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» The Complexity of Separating Points in the Plane
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TOG
2008
116views more  TOG 2008»
14 years 9 months ago
A photometric approach for estimating normals and tangents
This paper presents a technique for acquiring the shape of realworld objects with complex isotropic and anisotropic reflectance. Our method estimates the local normal and tangent ...
Michael Holroyd, Jason Lawrence, Greg Humphreys, T...
COMPGEOM
2007
ACM
14 years 11 months ago
Between umbra and penumbra
Computing shadow boundaries is a difficult problem in the case of non-point light sources. A point is in the umbra if it does not see any part of any light source; it is in full l...
Julien Demouth, Olivier Devillers, Hazel Everett, ...
COMPGEOM
2005
ACM
14 years 11 months ago
Kinetic sorting and kinetic convex hulls
Let S be a set of n points moving on the real line. The kinetic sorting problem is to maintain a data structure on the set S that makes it possible to quickly generate a sorted li...
Mohammad Ali Abam, Mark de Berg
VIS
2005
IEEE
109views Visualization» more  VIS 2005»
15 years 10 months ago
Topological Structures of 3D Tensor Fields
Tensor topology is useful in providing a simplified and yet detailed representation of a tensor field. Recently the field of 3D tensor topology is advanced by the discovery that d...
Xiaoqiang Zheng, Beresford N. Parlett, Alex Pang
CVPR
2009
IEEE
16 years 4 months ago
Extraction of Tubular Structures over an Orientation Domain
This paper presents a new method to extract a network of vessels centerlines from a medical image. The network is composed of local geodesics over a four-dimensional space that in...
Gabriel Peyré, Mickaël Péchaud,...