An effective condition for sampling surfaces with guarantees

  • Authors:
  • J-D Boissonnat;S. Oudot

  • Affiliations:
  • INRIA, Sophia-Antipolis, France;INRIA, Sophia-Antipolis, France

  • Venue:
  • SM '04 Proceedings of the ninth ACM symposium on Solid modeling and applications
  • Year:
  • 2004

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Abstract

The notion of ε-sample, as introduced by Amenta and Bern, has proven to be a key concept in the theory of sampled surfaces. Of particular interest is the fact that, if E is an ε-sample of a smooth surface S for a sufficiently small ε, then the Delaunay triangulation of E restricted to S is a good approximation of S, both in a topological and in a geometric sense. Hence, if one can construct an ε-sample, one also gets a good approximation of the surface. Moreover, correct reconstruction is ensured by various algorithms.In this paper, we introduce the notion of loose ε-sample. We show that the set of loose ε-samples contains and is asymptotically identical to the set of ε-samples. The main advantage of loose ε-samples over ε-samples is that they are easier to check and to construct. We also present a simple algorithm that constructs provably good surface samples and meshes.