We show that the theory of varifolds can be suitably enriched to open the way to applications in the field of discrete and computational geometry. Using appropriate regularizations of the mass and of the first variation of a varifold we introduce the notion of approximate mean curvature and show various convergence results that hold, in particular, for sequences of discrete varifolds associated with point clouds or pixel/voxel-type discretizations of d-surfaces in the Euclidean n-space, without restrictions on dimension and codimension. The variational nature of the approach also allows us to consider surfaces with singularities, and in that case the approximate mean curvature is consistent with the generalized mean curvature of the limit surface. A series of numerical tests are provided in order to illustrate the effectiveness and generality of the method.

A Varifold Approach to Surface Approximation / Buet, Blanche; Leonardi, Gian Paolo; Masnou, Simon. - In: ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS. - ISSN 0003-9527. - ELETTRONICO. - 226:2(2017), pp. 639-694. [10.1007/s00205-017-1141-0]

A Varifold Approach to Surface Approximation

Leonardi, Gian Paolo;
2017

Abstract

We show that the theory of varifolds can be suitably enriched to open the way to applications in the field of discrete and computational geometry. Using appropriate regularizations of the mass and of the first variation of a varifold we introduce the notion of approximate mean curvature and show various convergence results that hold, in particular, for sequences of discrete varifolds associated with point clouds or pixel/voxel-type discretizations of d-surfaces in the Euclidean n-space, without restrictions on dimension and codimension. The variational nature of the approach also allows us to consider surfaces with singularities, and in that case the approximate mean curvature is consistent with the generalized mean curvature of the limit surface. A series of numerical tests are provided in order to illustrate the effectiveness and generality of the method.
2017
27-giu-2017
226
2
639
694
A Varifold Approach to Surface Approximation / Buet, Blanche; Leonardi, Gian Paolo; Masnou, Simon. - In: ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS. - ISSN 0003-9527. - ELETTRONICO. - 226:2(2017), pp. 639-694. [10.1007/s00205-017-1141-0]
Buet, Blanche; Leonardi, Gian Paolo; Masnou, Simon
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1147205
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