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COMPGEOM
2004
ACM
15 years 7 months ago
Computing the visibility graph of points within a polygon
We study the problem of computing the visibility graph defined by a set P of n points inside a polygon Q: two points p, q ∈ P are joined by an edge if the segment pq ⊂ Q. Ef...
Boaz Ben-Moshe, Olaf Hall-Holt, Matthew J. Katz, J...
SEMWEB
2009
Springer
15 years 8 months ago
Graph-Based Ontology Construction from Heterogenous Evidences
Abstract. Ontologies are tools for describing and structuring knowledge, with many applications in searching and analyzing complex knowledge bases. Since building them manually is ...
Christoph Böhm, Philip Groth, Ulf Leser
SDM
2009
SIAM
161views Data Mining» more  SDM 2009»
15 years 11 months ago
Polynomial-Delay and Polynomial-Space Algorithms for Mining Closed Sequences, Graphs, and Pictures in Accessible Set Systems.
In this paper, we study efficient closed pattern mining in a general framework of set systems, which are families of subsets ordered by set-inclusion with a certain structure, pro...
Hiroki Arimura, Takeaki Uno
ECCV
2010
Springer
15 years 7 months ago
Shape Analysis of Planar Objects with Arbitrary Topologies using Conformal Geometry
The study of 2D shapes is a central problem in the field of computer vision. In 2D shape analysis, classification and recognition of objects from their observed silhouette are e...
ICTCS
2005
Springer
15 years 7 months ago
Improved Exact Exponential Algorithms for Vertex Bipartization and Other Problems
Abstract. We study efficient exact algorithms for several problems including Vertex Bipartization, Feedback Vertex Set, 3-Hitting Set, Max Cut in graphs with maximum degree at most...
Venkatesh Raman, Saket Saurabh, Somnath Sikdar