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La triangulation de Delaunay d'un échantillon aléatoire d'un bon échantillon a une taille linéaire

Abstract

A good sample is a point set such that any ball of radius ϵ\epsilon contains a constant number of points. The Delaunay triangulation of a good sample is proved to have linear size, unfortunately this is not enough to ensure a good time complexity of the randomized incremental construction of the Delaunay triangulation. In this paper we prove that a random Bernoulli sample of a good sample has a triangulation of linear size. This result allows to prove that the randomized incremental construction needs an expected linear size and an expected O(nlogn)O(n\log n) time.Un bon échantillon est un ensemble de points tel que toute boule de rayon ϵ\epsilon contienne un nombre constant de points.Il est démontré que la triangulation de Delaunay d'un bon échantillon a une taille linéaire, malheureusement cela ne suffit pas à assurerune bonne complexité à la construction incrémentale randomisée de latriangulation de Delaunay.Dans ce rapport, nous démontrons que la triangulation d'un échantillon aléatoire de Bernoullid'un bon échantillon a une taille linéaire. Nous en déduisonsque la construction incrémentale randomisée peut être faite en tempsO(nlogn)O(n \log n) et espace O(n)O(n)

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This paper was published in INRIA a CCSD electronic archive server.

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