Computable bounds for the reach and $r$-convexity of subsets of $\mathbb{R}^d$ - 3IA Côte d’Azur – Interdisciplinary Institute for Artificial Intelligence Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2023

Computable bounds for the reach and $r$-convexity of subsets of $\mathbb{R}^d$

Résumé

The convexity of a set can be generalized to the two weaker notions of reach and $r$-convexity; both describe the regularity of a set's boundary. For any compact subset of $\mathbb{R}^d$, we provide methods for computing upper bounds on these quantities from point cloud data. The bounds converge to the respective quantities as the point cloud becomes dense in the set, and the rate of convergence for the bound on the reach is given under a weak regularity condition. We also introduce the $\beta$-reach, a generalization of the reach that excludes small-scale features of size less than a parameter $\beta\in[0,\infty)$. Numerical studies suggest how the $\beta$-reach can be used in high-dimension to infer the reach and other geometric properties of smooth submanifolds.
Fichier principal
Vignette du fichier
reach_sn.pdf (1.59 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03854575 , version 1 (15-11-2022)
hal-03854575 , version 2 (20-06-2023)

Identifiants

  • HAL Id : hal-03854575 , version 2

Citer

Ryan Cotsakis. Computable bounds for the reach and $r$-convexity of subsets of $\mathbb{R}^d$. 2023. ⟨hal-03854575v2⟩
54 Consultations
44 Téléchargements

Partager

Gmail Facebook X LinkedIn More