Conference Paper

A Global Criterion for the Computation of Statistical Shape Model Parameters Based on Correspondence Probabilities

DOI: 10.1007/978-3-540-78640-5_56 Conference: Bildverarbeitung für die Medizin 2008, Algorithmen, Systeme, Anwendungen, Proceedings des Workshops vom 6. bis 8. April 2008 in Berlin
Source: DBLP


A fundamental problem when building a statistical shape model (SSM) is the correspondence problem. We present an approach for unstructured point sets where one-to-one correspondences are replaced by correspondence probabilities between shapes which are determined us- ing the Expectation Maximization - Iterative Closest Points registration. We propose a unified MAP framework to compute the model parameters which leads to an optimal adaption of the model to the observations. The optimization of the MAP explanation with respect to the obser- vation and the generative model parameters leads to very efficient and closed-form solutions for (almost) all parameters. Experimental results on synthetic data and brain structures as well as a performance compar- ison with a statistical shape model built on one-to-one correspondences show the efficiency and advantages of this approach.

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Available from: Heinz Handels