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Bayesian Non-negative Matrix Factorization

  • Mikkel N. Schmidt
  • Ole Winther
  • Lars Kai Hansen
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5441)

Abstract

We present a Bayesian treatment of non-negative matrix factorization (NMF), based on a normal likelihood and exponential priors, and derive an efficient Gibbs sampler to approximate the posterior density of the NMF factors. On a chemical brain imaging data set, we show that this improves interpretability by providing uncertainty estimates. We discuss how the Gibbs sampler can be used for model order selection by estimating the marginal likelihood, and compare with the Bayesian information criterion. For computing the maximum a posteriori estimate we present an iterated conditional modes algorithm that rivals existing state-of-the-art NMF algorithms on an image feature extraction problem.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Mikkel N. Schmidt
    • 1
  • Ole Winther
    • 2
  • Lars Kai Hansen
    • 2
  1. 1.Department of EngineeringUniversity of CambridgeUK
  2. 2.DTU InformaticsTechnical University of DenmarkDenmark

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