Planar Minimization Diagrams via Subdivision with Applications to Anisotropic Voronoi Diagrams

Let X = {f1, …, fn} be a set of scalar functions of the form fi : ℝ2 → ℝ which satisfy some natural properties. We describe a subdivision algorithm for computing a clustered ε‐isotopic approximation of the minimization diagram of X. By exploiting soft predicates and clustering of Voronoi vertices, o...

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Vydáno v:	Computer graphics forum Ročník 35; číslo 5; s. 229 - 247
Hlavní autoři:	Bennett, H., Papadopoulou, E., Yap, C.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford Blackwell Publishing Ltd 01.08.2016
Témata:	Algorithms Anisotropy Categories and Subject Descriptors (according to ACM CCS) F.2.2 [Analysis of Algorithms and Problem Complexity]: Nonnumerical Algorithms and Problems-Geometrical problems and computations G.1.0 [Numerical Analysis]: General-Interval arithmetic G.1.2 [Numerical Analysis]: Approximation-Approximation of surfaces and contours G.4 [Mathematical Software]: -Algorithm design and analysis I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling-Geometric algorithms Image processing systems Mathematical analysis Mathematical models Minimization Optimization Scalars Studies Subdivisions
ISSN:	0167-7055, 1467-8659
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Let X = {f1, …, fn} be a set of scalar functions of the form fi : ℝ2 → ℝ which satisfy some natural properties. We describe a subdivision algorithm for computing a clustered ε‐isotopic approximation of the minimization diagram of X. By exploiting soft predicates and clustering of Voronoi vertices, our algorithm is the first that can handle arbitrary degeneracies in X, and allow scalar functions which are piecewise smooth, and not necessarily semi‐algebraic. We apply these ideas to the computation of anisotropic Voronoi diagram of polygonal sets; this is a natural generalization of anisotropic Voronoi diagrams of point sites, which extends multiplicatively weighted Voronoi diagrams. We implement a prototype of our anisotropic algorithm and provide experimental results.
Bibliografie:	ArticleID:CGF12979 istex:FE3E80C9E7922B52CEDE558E09766C85AE01521A ark:/67375/WNG-HG73N5NS-8 Chee and Huck are supported by NSF Grant #CCF‐1423228. Evanthia is supported by SNSF #20GG21‐134355, #200021E‐154387. SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23
ISSN:	0167-7055 1467-8659
DOI:	10.1111/cgf.12979