Object Recognition with Informative Features and Linear Classification

  • Authors:
  • Michel Vidal-Naquet;Shimon Ullman

  • Affiliations:
  • -;-

  • Venue:
  • ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
  • Year:
  • 2003

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Abstract

In this paper we show that efficient object recognition canbeobtained by combining informative features with linearclassification. The results demonstrate the superiority ofinformative class-specific features, as compared with generic typefeatures such as wavelets, for the task of object recognition. Weshow that information rich features can reach optimal performancewith simple linear separation rules, while generic feature basedclassifiers require more complex classification schemes. This issignificant because efficient and optimal methods have beendeveloped for spaces that allow linear separation. To comparedifferent strategies for feature extraction, we trained andcompared classifiers working in feature spaces of the same lowdimensionality, using two feature types (image fragments vs.wavelets) and two classification rules (linear hyperplane and aBayesian Network). The results show that by maximizing theindividual information of the features, it is possible to obtainefficient classification by a simple linear separating rule, aswellas more efficient learning.