Learning Class Specific Graph Prototypes

  • Authors:
  • Shengping Xia;Edwin R. Hancock

  • Affiliations:
  • ATR Lab, School of Electronic Science and Engineering, National University of Defense Technology, Changsha, P.R. China 410073;Department of Computer Science, University of York, York, UK YO10 5DD

  • Venue:
  • ICIAP '09 Proceedings of the 15th International Conference on Image Analysis and Processing
  • Year:
  • 2009

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Abstract

This paper describes how to construct a graph prototype model from a large corpus of multi-view images using local invariant features. We commence by representing each image with a graph, which is constructed from a group of selected SIFT features. We then propose a new pairwise clustering method based on a graph matching similarity measure. The positive example graphs of a specific class accompanied with a set of negative example graphs are clustered into one or more clusters, which minimize an entropy function. Each cluster is simplified into a tree structure composed of a series of irreducible graphs, and for each of which a node co-occurrence probability matrix is obtained. Finally, a recognition oriented class specific graph prototype (CSGP) is automatically generated from the given graph set. Experiments are performed on over 50K training images spanning ~500 objects and over 20K test images of 68 objects. This demonstrates the scalability and recognition performance of our model.