Hardware-assisted natural neighbor interpolation

Quanfu Fan, Alon Efrat, Vladlen Koltun, Shankar Krishnan, Suresh Venkatasubramanian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations

Abstract

Natural neighbor interpolation is a weighted average interpolation method that is based on Voronoi tessellation. In this paper, we present and implement an algorithm for performing natural neighbor interpolation using graphics hardware. Unlike traditional software-based approaches that process one query at a time, we develop a scheme that computes the entire scalar field induced by natural neighbor interpolation, at which point a query is a trivial array lookup, arid range queries over the field are easy to perform. Our approach is faster than the best known software implementations and makes use of general purpose stream programming capabilities of current graphics cards. We also present a simple scheme that requires no advanced graphics capabilities and can process natural neighbor queries faster than existing software-based approaches. Finally, recognizing the limitation incurred by the bounded size of graphics frame buffers, we propose a sub-division approach that allows performing queries locally in a subdivision of the input domain. This approach can reduce to a negligibly small degree (< 1%) the loss of precision caused by the naive scaling method while still processing queries faster than the software-based approaches when the number of sites is large.

Original languageEnglish (US)
Title of host publicationProceedings of the Seventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics
EditorsC. Demetrescu, R. Sedgewick, R. Tamassia
Pages111-120
Number of pages10
StatePublished - Dec 1 2005
EventSeventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics - Vancouver, BC, Canada
Duration: Jan 22 2005Jan 22 2005

Publication series

NameProceedings of the Seventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics

Other

OtherSeventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics
CountryCanada
CityVancouver, BC
Period1/22/051/22/05

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Fan, Q., Efrat, A., Koltun, V., Krishnan, S., & Venkatasubramanian, S. (2005). Hardware-assisted natural neighbor interpolation. In C. Demetrescu, R. Sedgewick, & R. Tamassia (Eds.), Proceedings of the Seventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics (pp. 111-120). (Proceedings of the Seventh Workshop on Algorithm Engineering and Experiments and the Second Workshop on Analytic Algorithms and Combinatorics).