Continuous limits of discrete perimeters
ESAIM: Modélisation mathématique et analyse numérique, Tome 44 (2010) no. 2, pp. 207-230.

We consider a class of discrete convex functionals which satisfy a (generalized) coarea formula. These functionals, based on submodular interactions, arise in discrete optimization and are known as a large class of problems which can be solved in polynomial time. In particular, some of them can be solved very efficiently by maximal flow algorithms and are quite popular in the image processing community. We study the limit in the continuum of these functionals, show that they always converge to some “crystalline” perimeter/total variation, and provide an almost explicit formula for the limiting functional.

DOI : 10.1051/m2an/2009044
Classification : 49Q20, 65K10
Mots-clés : generalized coarea formula, total variation, anisotropic perimeter 
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Chambolle, Antonin; Giacomini, Alessandro; Lussardi, Luca. Continuous limits of discrete perimeters. ESAIM: Modélisation mathématique et analyse numérique, Tome 44 (2010) no. 2, pp. 207-230. doi : 10.1051/m2an/2009044. http://www.numdam.org/articles/10.1051/m2an/2009044/

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