Comparing the similarity of statistical shape models using the bhattacharya metric

Authors:
K. O. Babalola;T. F. Cootes;B. Patenaude;A. Rao;M. Jenkinson
Affiliations:
Division of Imaging Science and Biomedical Engineering, University of Manchester, UK;Division of Imaging Science and Biomedical Engineering, University of Manchester, UK;FMRIB Centre, John Radcliffe Hospital, University of Oxford, UK;Visual Information Processing, Department of Computing, Imperial College London, UK;FMRIB Centre, John Radcliffe Hospital, University of Oxford, UK
Venue:
MICCAI'06 Proceedings of the 9th international conference on Medical Image Computing and Computer-Assisted Intervention - Volume Part I
Year:
2006

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Abstract

A variety of different methods of finding correspondences across sets of images to build statistical shape models have been proposed, each of which is likely to result in a different model. When dealing with large datasets (particularly in 3D), it is difficult to evaluate the quality of the resulting models. However, if the different methods are successfully modelling the true underlying shape variation, the resulting models should be similar. If two different techniques lead to similar models, it suggests that they are indeed approximating the true shape change. In this paper we explore a method of comparing statistical shape models by evaluating the Bhattacharya overlap between their implied shape distributions. We apply the technique to investigate the similarity of three models of the same 3D dataset constructed using different methods.