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WSCG
2001
92views more  WSCG 2001»
15 years 3 months ago
Enhancements to Directional Coherence Maps
Directional Coherence Maps as proposed by Guo in '98 are a very efficient acceleration technique for ray tracing based global illumination renderers. It vastly reduces the nu...
Annette Scheel, Marc Stamminger, Jörg Pü...
ICPR
2008
IEEE
15 years 8 months ago
Specularity removal and relighting of 3D object model for virtual exhibition
To create photorealistic three-dimensional (3D) model of real objects is a challenging computer vision problem. While there are methods for 3D digitization of objects with high ge...
Shu-Kam Chow, Kwok-Leung Chan
CVPR
2011
IEEE
14 years 9 months ago
Single-Image Shadow Detection and Removal using Paired Regions
In this paper, we address the problem of shadow detection and removal from single images of natural scenes. Different from traditional methods that explore pixel or edge informati...
Ruiqi Guo, Qieyun Dai, Derek Hoiem
DPHOTO
2010
287views Hardware» more  DPHOTO 2010»
15 years 3 months ago
Dead leaves model for measuring texture quality on a digital camera
We describe the procedure to evaluate the image quality of a camera in terms of texture preservation. We use a stochastic model coming from stochastic geometry, and known as the d...
Frédéric Cao, Frederic Guichard, Her...
112
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FGR
2006
IEEE
134views Biometrics» more  FGR 2006»
15 years 8 months ago
Local Binary Patterns as an Image Preprocessing for Face Authentication
One of the major problem in face authentication systems is to deal with variations in illumination. In a realistic scenario, it is very likely that the lighting conditions of the ...
Guillaume Heusch, Yann Rodriguez, Sébastien...