Affine invariant feature extraction using symmetry

Authors:
Arasanathan Anjulan;Nishan Canagarajah
Affiliations:
Department of Electrical and Electronic Engineering, University of Bristol, Bristol, UK;Department of Electrical and Electronic Engineering, University of Bristol, Bristol, UK
Venue:
ACIVS'05 Proceedings of the 7th international conference on Advanced Concepts for Intelligent Vision Systems
Year:
2005

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Abstract

This paper describes a novel method for extracting affine invariant regions from images, based on an intuitive notion of symmetry. We define a local affine-invariant symmetry measure and derive a technique for obtaining symmetry regions. Compared to previous approaches the regions obtained are considered to be salient regions, of the image. We apply the symmetry-based technique to obtain affine-invariant regions in images with large-scale difference and demonstrate superior performance compared to existing methods.