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COMPGEOM
1999
ACM

Crust and Anti-Crust: A One-Step Boundary and Skeleton Extraction Algorithm

12 years 1 months ago
Crust and Anti-Crust: A One-Step Boundary and Skeleton Extraction Algorithm
We wish to extract the topology from scanned maps. In previous work [15] this was done by extracting a skeleton from the Voronoi diagram, but this required vertex labelling and was only useable for polygon maps. We wished to take the crust algorithm of Amenta, Bern and Eppstein [3] and modify it to extract the skeleton from unlabelled vertices. We find that by reducing the algorithm to a local test on the simple Voronoi diagram of point sites we may extract both the crust and the skeleton simultaneously. We show that this produces the same results as the original algorithm, and illustrate its utility with various cartographic applications. Keywords Crust; Skeleton; Medial axis; Voronoi diagram;
Christopher M. Gold
Added 02 Aug 2010
Updated 02 Aug 2010
Type Conference
Year 1999
Where COMPGEOM
Authors Christopher M. Gold
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