Most local feature detectors/descriptors implicitly assume that the scene is (locally) planar, an assumption that is violated at surface discontinuities. We show that this restriction is, at least in theory, un-necessary, as one can construct local features that are viewpoint-invariant for generic non-planar scenes. However, we show that any such feature necessarily sacrifices shape information...

Antonín Kučera?1 and Javier Esparza??2 1 Faculty of Informatics, Masaryk University, Botanická 68a, 60200 Brno, Czech Republic, [email protected] 2 Institut für Informatik, Technische Universität München, Arcisstr. 21, D-80290 München, Germany, [email protected] Abstract. We study the following problem: Given a transition system T and its quotient T= under an equivalence , which are the sets L, L...

To appear in Theoretical Computer Science The Regular Viewpoint on PA-Pro esses D. Lugiez Lab. d'Informatique de Marseille, Univ. Aix-Marseille & CNRS URA 1787, 39, r. Joliot-Curie, 13453 Marseille Cedex 13, FRANCE and Ph. S hnoebelen Lab. Spe i ation and Veri ation, ENS de Ca han & CNRS UMR 8643, 61 av. Pdt Wilson, 94235 Ca han Cedex, FRANCE Abstra t PA is the pro ess algebra allowing non-dete...

This paper discusses the presentation I held at the symposium on genetics during the 4th European Breast Cancer Conference held in Hamburg in March 2004.Primarily, the goals and working methods of the advocacy group specialised in Hereditary Breast/Ovarian Cancer of the Dutch Breast Cancer Patient Organisation known as BorstkankerVereniging Nederland (BVN) are explained. Furthermore, some speci...

The ODP multiple viewpoints model prompts the very challenging issue of cross viewpoint consistency This paper considers de nitions of consistency arising from the RM ODP and relates these in a mathematical framework for consistency checking We place existing FDTs in particular LOTOS into this framework Then we consider the prospects for viewpoint translation Our conclusions centre on the relat...

ADDRESS: 2125 13th Street, NW., Washington 9, D.C. hyperexcitable, presumably as a result of central facilitation. From this, it seems reasonable to suggest that other nervous mechanisms, including feeding reflexes, may be correspondingly facilitated. Another important reaction essential for normal feeding is movement or locomotion, as animals, including infants, are more restless just before t...

In this paper we try to give a comprehensive definition of the notion of viewpoint complexity for 3D scenes. We show that this notion is very useful in various areas of computer graphics and that its accurate measurement permits important improvements in these areas. Methods of more or less accurate computation of viewpoint complexity for a scene are given.

PA is the process algebra allowing non-determinism, sequential and parallel compositions, and recursion. We suggest a view of PAprocesses as tree languages. Our main result is that the set of (iterated) predecessors of a regular set of PA-processes is a regular tree language, and similarly for (iterated) successors. Furthermore, the corresponding tree-automata can be built e ectively in polynom...

A tom interferometers have been used to make highprecision measurements in a diverse array of fields. Their more familiar optical counterparts, light interferometers, use matter elements such as mirrors and beam splitters to manipulate light waves. Atom interferometers invert these roles: laser pulses manipulate matter waves of atoms. These pulses split a matter wave into two, redirect the two ...

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