Sciweavers

COMPGEOM
2007
ACM
13 years 9 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
2007
ACM
13 years 11 months ago
On approximate halfspace range counting and relative epsilon-approximations
The paper consists of two major parts. In the first part, we re-examine relative -approximations, previously studied in [12, 13, 18, 25], and their relation to certain geometric p...
Boris Aronov, Sariel Har-Peled, Micha Sharir
COMPGEOM
2007
ACM
13 years 11 months ago
Thick non-crossing paths and minimum-cost flows in polygonal domains
Valentin Polishchuk, Joseph S. B. Mitchell
COMPGEOM
2007
ACM
13 years 11 months ago
Computing the exact arrangement of circles on a sphere, with applications in structural biology: video
The Bentley-Ottmann (BO) algorithm, initially designed to report the intersection points of line-segments in the plane, is the prototypical sweep-line algorithm. This video presen...
Frédéric Cazals, Sébastien Lo...
COMPGEOM
2007
ACM
13 years 11 months ago
Towards an implementation of the 3D visibility skeleton
Linqiao Zhang, Hazel Everett, Sylvain Lazard, Sue ...
COMPGEOM
2007
ACM
13 years 11 months ago
A PTAS for k-means clustering based on weak coresets
Dan Feldman, Morteza Monemizadeh, Christian Sohler
COMPGEOM
2007
ACM
13 years 11 months ago
Distributed computation of virtual coordinates
Sensor networks are emerging as a paradigm for future computing, but pose a number of challenges in the fields of networking and distributed computation. One challenge is to devis...
Mirela Ben-Chen, Craig Gotsman, Camille Wormser
COMPGEOM
2007
ACM
13 years 11 months ago
Kinetic KD-trees and longest-side KD-trees
We propose a simple variant of kd-trees, called rank-based kd-trees, for sets of points in Rd . We show that a rank-based kd-tree, like an ordinary kd-tree, supports range search ...
Mohammad Ali Abam, Mark de Berg, Bettina Speckmann
COMPGEOM
2007
ACM
13 years 11 months ago
Streaming algorithms for line simplification
We study the following variant of the well-known line-simplification problem: we are getting a possibly infinite sequence of points p0, p1, p2, . . . in the plane defining a polyg...
Mohammad Ali Abam, Mark de Berg, Peter Hachenberge...