An Adaptive Approach for Affine-Invariant 2D Shape Description

Authors:
A. Bandera;E. Antúnez;R. Marfil
Affiliations:
Grupo ISIS, Dpto. Tecnología Electrónica, University of Málaga, Spain;PRIP, Vienna University of Technology, Austria;Grupo ISIS, Dpto. Tecnología Electrónica, University of Málaga, Spain
Venue:
IbPRIA '09 Proceedings of the 4th Iberian Conference on Pattern Recognition and Image Analysis
Year:
2009

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Abstract

In this paper, a new algorithm for 2D shape characterization is proposed. This method characterizes a planar object using a triangle-area representation obtained from its closed contour. As main novelty with respect to previous approaches, in our approach the triangle side lengths at each contour point are adapted to the local variations of the shape, removing noise from the contour without missing relevant points. This representation is invariant to affine transformations, and robust against noise. The performance of our proposal is demonstrated using a standard test on the well-known MPEG-7 CE-shape-1 data set.