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Simultaneous Nonrigid Registration of Multiple Point Sets and Atlas Construction

  • Fei Wang
  • Baba C. Vemuri
  • Anand Rangarajan
  • Ilona M. Schmalfuss
  • Stephan J. Eisenschenk
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3953)

Abstract

Estimating a meaningful average or mean shape from a set of shapes represented by unlabeled point-sets is a challenging problem since, usually this involves solving for point correspondence under a non-rigid motion setting. In this paper, we propose a novel and robust algorithm that is capable of simultaneously computing the mean shape from multiple unlabeled point-sets (represented by finite mixtures) and registering them nonrigidly to this emerging mean shape. This algorithm avoids the correspondence problem by minimizing the Jensen-Shannon (JS) divergence between the point sets represented as finite mixtures. We derive the analytic gradient of the cost function namely, the JS-divergence, in order to efficiently achieve the optimal solution. The cost function is fully symmetric with no bias toward any of the given shapes to be registered and whose mean is being sought. Our algorithm can be especially useful for creating atlases of various shapes present in images as well as for simultaneously (rigidly or non-rigidly) registering 3D range data sets without having to establish any correspondence. We present experimental results on non-rigidly registering 2D as well as 3D real data (point sets).

Keywords

Fetal Alcohol Syndrome Nonrigid Registration Active Shape Model Correspondence Problem Deformable Shape 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Fei Wang
    • 1
  • Baba C. Vemuri
    • 1
  • Anand Rangarajan
    • 1
  • Ilona M. Schmalfuss
    • 2
  • Stephan J. Eisenschenk
    • 3
  1. 1.Department of Computer & Information Sciences & Engr.University of FloridaGainesville
  2. 2.Departments of RadiologyUniversity of FloridaGainesville
  3. 3.Department of NeurologyUniversity of FloridaGainesville

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