Finding a Minimum Medial Axis of a Discrete Shape is NP-hard
Abstract
The medial axis is a classical representation of digital objects widely used in many applications. However, such a set of balls may not be optimal: subsets of the medial axis may exist without changing the reversivility of the input shape representation. In this article, we first prove that finding a minimum medial axis is an NP-hard problem for the Euclidean distance. Then, we compare two algorithms which compute an approximation of the minimum medial axis, one of them providing bounded approximation results.
Domains
Image Processing [eess.IV]Origin | Publisher files allowed on an open archive |
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