Discriminative Shape Alignment

  • Authors:
  • Marco Loog;Marleen Bruijne

  • Affiliations:
  • Pattern Recognition Group, Faculty of Electrical Engineering, Mathematics, and Computer Science, Delft University of Technology, Delft, The Netherlands and The Image Group, Department of Computer ...;Biomedical Imaging Group Rotterdam, Departments of Radiology and Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands and The Image Group, Department of Computer Science, Univer ...

  • Venue:
  • IPMI '09 Proceedings of the 21st International Conference on Information Processing in Medical Imaging
  • Year:
  • 2009

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Abstract

The alignment of shape data to a common mean before its subsequent processing is an ubiquitous step within the area shape analysis. Current approaches to shape analysis or, as more specifically considered in this work, shape classification perform the alignment in a fully unsupervised way, not taking into account that eventually the shapes are to be assigned to two or more different classes. This work introduces a discriminative variation to well-known Procrustes alignment and demonstrates its benefit over this classical method in shape classification tasks. The focus is on two-dimensional shapes from a two-class recognition problem.