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Author
Josep Llados; Horst Bunke; Enric Marti
Title
Finding rotational symmetries by cyclic string matching
Type
Journal Article
Year
1997
Publication
Pattern recognition letters
Abbreviated Journal
PRL
Volume
18
Issue
14
Pages
1435-1442
Keywords
Rotational symmetry; Reflectional symmetry; String matching
Abstract
Symmetry is an important shape feature. In this paper, a simple and fast method to detect perfect and distorted rotational symmetries of 2D objects is described. The boundary of a shape is polygonally approximated and represented as a string. Rotational symmetries are found by cyclic string matching between two identical copies of the shape string. The set of minimum cost edit sequences that transform the shape string to a cyclically shifted version of itself define the rotational symmetry and its order. Finally, a modification of the algorithm is proposed to detect reflectional symmetries. Some experimental results are presented to show the reliability of the proposed algorithm
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Elsevier
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Notes
DAG;IAM;
Approved
no
Call Number
IAM @ iam @ LBM1997a
Serial
1562
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