Bayesian order-adaptive clustering for video segmentation

  • Authors:
  • Peter Orbanz;Samuel Braendle;Joachim M. Buhmann

  • Affiliations:
  • Institute of Computational Science, ETH Zurich;Institute of Computational Science, ETH Zurich;Institute of Computational Science, ETH Zurich

  • Venue:
  • EMMCVPR'07 Proceedings of the 6th international conference on Energy minimization methods in computer vision and pattern recognition
  • Year:
  • 2007

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Abstract

Video segmentation requires the partitioning of a series of images into groups that are both spatially coherent and smooth along the time axis. We formulate segmentation as a Bayesian clustering problem. Context information is propagated over time by a conjugate structure. The level of segment resolution is controlled by a Dirichlet process prior. Our contributions include a conjugate nonparametric Bayesian model for clustering in multivariate time series, a MCMC inference algorithm, and a multiscale sampling approach for Dirichlet process mixture models. The multiscale algorithm is applicable to data with a spatial structure. The method is tested on synthetic data and on videos from the MPEG4 benchmark set.