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Hyperbolic Voronoi Diagrams Made Easy

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2 Author(s)
Nielsen, F. ; Sony Comput. Sci. Labs., Ecole Polytech., Palaiseau, France ; Nock, R.

We present a simple framework to compute hyperbolic Voronoi diagrams of finite point sets as affine diagrams. We prove that bisectors in Klein's non-conformal disk model are hyperplanes that can be interpreted as power bisectors of Euclidean balls. Therefore our method simply consists in computing an equivalent clipped power diagram followed by a mapping transformation depending on the selected representation of the hyperbolic space (e.g., Poincare conformal disk or upper-plane representations). We discuss on extensions of this approach to weighted and k-order diagrams, and describe their dual triangulations. Finally, we consider two useful primitives on the hyperbolic Voronoi diagrams for designing tailored user interfaces of an image catalog browsing application in the hyperbolic disk: (1) finding nearest neighbors, and (2) computing smallest enclosing balls.

Published in:

Computational Science and Its Applications (ICCSA), 2010 International Conference on

Date of Conference:

23-26 March 2010