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COMPGEOM
2007
ACM
15 years 10 months ago
Querying approximate shortest paths in anisotropic regions
We present a data structure for answering approximate shortest path queries in a planar subdivision from a fixed source. Let 1 be a real number. Distances in each face of this sub...
Siu-Wing Cheng, Hyeon-Suk Na, Antoine Vigneron, Ya...
ADCM
2007
155views more  ADCM 2007»
15 years 6 months ago
Numerical differentiation by radial basis functions approximation
Based on radial basis functions approximation, we develop in this paper a new computational algorithm for numerical differentiation. Under an a priori and an a posteriori choice r...
T. Wei, Y. C. Hon
CAD
2006
Springer
15 years 6 months ago
An example on approximation by fat arcs and fat biarcs
Fat arcs form bounding boxes for planar curves. An example on approximation by fat arcs, provided by Qun and Rokne, is corrected. The third derivative of the given curve segment u...
Jun-Hai Yong, Xiao Chen, Jean-Claude Paul
CAGD
2000
246views more  CAGD 2000»
15 years 6 months ago
Estimation of the principle curvatures of approximated surfaces
This paper presents a method for estimating curvature values of a surface, which is given only approximatively, e.g., by measured data. The presented method requires estimates of ...
Christian Wollmann
DCG
2010
289views more  DCG 2010»
15 years 6 months ago
Algorithms for Approximate Shortest Path Queries on Weighted Polyhedral Surfaces
We consider the well known geometric problem of determining shortest paths between pairs of points on a polyhedral surface P, where P consists of triangular faces with positive we...
Lyudmil Aleksandrov, Hristo Djidjev, Hua Guo, Anil...