| HAL : hal-00023033, version 1 |
| DOI : 10.1016/S0304-3975(03)00050-1 |
| Fiche détaillée | Récupérer au format |
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| Theoretical Computer Science 304 (2003) 35-57 |
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| An algorithm reconstructing lattice convex sets |
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| Sara Brunetti 1Alain Daurat 2, 3 |
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| (2003) |
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| In this paper, we study the problem of reconstructing special lattice sets from X-rays in a finite set of prescribed directions. We present the class of "Q-convex" sets which is a new class of subsets of Z2 having a certain kind of weak connectedness. The main result of this paper is a polynomial-time algorithm solving the reconstruction problem for the "Q-convex" sets. These sets are uniquely determined by certain finite sets of directions. As a result, this algorithm can be used for reconstructing convex subsets of Z2 from their X-rays in some suitable sets of four lattice directions or in any set of seven mutually non parallel lattice directions. |
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| 1 : | Dipartimento di Scienze Matematiche ed Informatiche |
| Università degli studi di Siena | |
| 2 : | Laboratoire de Logique, Algorithmique et Informatique (LLAIC1) |
| Université d'Auvergne - Clermont-Ferrand I | |
| 3 : | Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection (LSIIT) |
| CNRS : UMR7005 – Université Louis Pasteur - Strasbourg I | |
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| Domaine | : | Informatique/Mathématique discrète |
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| algorithms – combinatorial problems – convexity – discrete tomography – lattice sets |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00023033, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00023033/fr/ | |
| oai:hal.archives-ouvertes.fr:hal-00023033_v1 | |
| Contributeur : Alain Daurat | |
| Soumis le : Mercredi 19 Avril 2006, 12:39:52 | |
| Dernière modification le : Mercredi 19 Avril 2006, 14:03:28 | |