Hierarchical Feature Extraction for Image Recognition

  • Authors:
  • Matthew Partridge;Marwan Jabri

  • Affiliations:
  • School of Electrical and Information Engineering, University of Sydney, Sydney, Australia www.sedal.usyd.edu.au.;Electrical and Computer Engineering, O.H.S.U., Beaverton, OR, USA

  • Venue:
  • Journal of VLSI Signal Processing Systems
  • Year:
  • 2002

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Abstract

This paper applies a hierarchical classifier to two image recognition tasks. At the heart of this classifier, like many other classifiers, is a distance metric for determining the similarity of pairs of images. As the generalisation performance is often strongly related to the effectiveness of this measure, this paper develops a measure that is statistically more reliable than some metrics, but does not discard discriminating information, often regarded as “noise”. In addition, it may be computed quickly. This paper also experimentally shows that the metric may be used in the hierarchical classifier to yield error rates far lower to those based on the Euclidean distance metric on the two image recognition tasks. Furthermore, it gives the lowest reported error rate (2.63%) as well as the best training and classification times for a face recognition task.