Title: A simplified fold number detector for shapes with monotonic radii
Authors: Lin, JC
National Chiao Tung University
Department of Computer Science
Keywords: rotational symmetry;mirror symmetry;monotonicity;rotation-matching;regular polygons;bolt nuts;roses
Issue Date: 1-Jun-1996
Abstract: This paper concentrates on the fold number detection problem for the shapes with monotonic radii. The proposed method is extremely simple. Two monotonicity conditions are derived to ensure that the smallest positive integer l making integral integral((r,0)is an element of S) r(2) e(il theta) dr d theta nonzero is exactly the fold number of the given shape S. The fold numbers of regular polygons, roses, bolt nuts, and other kinds of shapes discussed in the present paper, can therefore be detected quite easily. Note especially that the proposed method uses no matching procedure, a procedure essential in many reported methods. Theoretical properties, mathematical proofs, illustrative figures, and experimental results, are all included in this paper. (C) 1996 Pattern Recognition Society. Published by Elsevier Science Ltd.
URI: http://dx.doi.org/10.1016/0031-3203(96)00130-6
ISSN: 0031-3203
DOI: 10.1016/0031-3203(96)00130-6
Volume: 29
Issue: 6
Begin Page: 997
End Page: 1005
Appears in Collections:Articles

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  1. A1996UN18400008.pdf