Parameter estimation in TV image restoration using variational distribution approximation

S. Derin Babacan*, Rafael Molina, Aggelos K. Katsaggelos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

145 Scopus citations

Abstract

In this paper, we propose novel algorithms for total variation (TV) based image restoration and parameter estimation utilizing variational distribution approximations. Within the hierarchical Bayesian formulation, the reconstructed image and the unknown hyperparameters for the image prior and the noise are simultaneously estimated. The proposed algorithms provide approximations to the posterior distributions of the latent variables using variational methods. We show that some of the current approaches to TV-based image restoration are special cases of our framework. Experimental results show that the proposed approaches provide competitive performance without any assumptions about unknown hyperparameters and clearly outperform existing methods when additional information is included.

Original languageEnglish (US)
Pages (from-to)326-339
Number of pages14
JournalIEEE Transactions on Image Processing
Volume17
Issue number3
DOIs
StatePublished - Mar 2008

Keywords

  • Bayesian methods
  • Image restoration
  • Parameter estimation
  • Total variation (TV)
  • Variational methods

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design

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