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IUI
2006
ACM
14 years 1 months ago
Posture and activity silhouettes for self-reporting, interruption management, and attentive interfaces
In this paper we present a novel system for monitoring a computer user’s posture and activities in front of the computer (e.g., reading, speaking on the phone, etc.) for self-re...
Alejandro Jaimes
SI3D
2005
ACM
14 years 29 days ago
ZP+: correct Z-pass stencil shadows
We present a novel algorithm for the rendering of hard shadows cast by a point light source. The well-known Z-pass method for rasterizing shadow volumes is not always correct. Our...
Samuel Hornus, Jared Hoberock, Sylvain Lefebvre, J...
FOCS
2008
IEEE
14 years 1 months ago
Learning Geometric Concepts via Gaussian Surface Area
We study the learnability of sets in Rn under the Gaussian distribution, taking Gaussian surface area as the “complexity measure” of the sets being learned. Let CS denote the ...
Adam R. Klivans, Ryan O'Donnell, Rocco A. Servedio
AFRIGRAPH
2001
ACM
13 years 11 months ago
Exploiting coherence of shadow rays
We present independent method to reduce the number of shadow ray tests. It can be used with standard acceleration ray tracing algorithms. Our method is conservative and produces t...
Andrzej Lukaszewski
CGF
2006
126views more  CGF 2006»
13 years 7 months ago
Soft Shadow Maps: Efficient Sampling of Light Source Visibility
Shadows, particularly soft shadows, play an important role in the visual perception of a scene by providing visual cues about the shape and position of objects. Several recent alg...
Lionel Atty, Nicolas Holzschuch, Marc Lapierre, Je...