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Full-Text Articles in Physical Sciences and Mathematics
Computational Geometry Column 33, Joseph O'Rourke
Computational Geometry Column 33, Joseph O'Rourke
Computer Science: Faculty Publications
Several recent SIGGRAPH papers on surface simplification are described.
Computational Geometry Column 34, Pankaj K. Agarwal, Joseph O'Rourke
Computational Geometry Column 34, Pankaj K. Agarwal, Joseph O'Rourke
Computer Science: Faculty Publications
Problems presented at the open-problem session of the 14th Annual ACM Symposium on Computational Geometry are listed.
Percentile Blobs For Image Similarity, Nicholas Howe
Percentile Blobs For Image Similarity, Nicholas Howe
Computer Science: Faculty Publications
We present a new algorithm called PBSIM for computing image similarity, based upon a novel method of extracting bloblike features from images. In tests on a classification task using a data set of over 1000 images, PBSIM shows significantly higher accuracy than algorithms based upon color histograms, as well as previously reported results for another approach based upon bloblike features.
Illumination By Floodlights, William Steiger, Ileana Streinu
Illumination By Floodlights, William Steiger, Ileana Streinu
Computer Science: Faculty Publications
We consider three problems about the illumination of planar regions with floodlights of prescribed angles. Problem 1 is the decision problem: given a wedge W of angle φ ≤ π, n points p1 . . . . . pn in the plane and n angles α1 . . . . . αn such that ∑ni=1 αi ≤ θ, decide whether W can be illuminated by floodlights of angles α1 , . . . , αn placed in some order at the points p1 , . . . , pn and then rotated appropriately. We show that this problem is the …
The Vertex-Edge Visibility Graph Of A Polygon, Joseph O'Rourke, Ileana Streinu
The Vertex-Edge Visibility Graph Of A Polygon, Joseph O'Rourke, Ileana Streinu
Computer Science: Faculty Publications
We introduce a new polygon visibility graph, the vertex-edge visibility graph GV E, and demonstrate that it encodes more geometric information about the polygon than does the vertex visibility graph GV. © 1998 Elsevier Science B.V.