Image separation using particle filters

Mauro Costagli, Ercan Engin Kuruoǧlu

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In this work, we will analyze the problem of source separation in the case of superpositions of different source images, which need to be extracted from a set of noisy observations. This problem occurs, for example, in the field of astrophysics, where the contributions of various Galactic and extra-Galactic components need to be separated from a set of observed noisy mixtures. Most of the previous work on the problem performed blind source separation, assuming noiseless models, and in the few cases when noise is taken into account, it is assumed that it is Gaussian and space-invariant. In this paper we review the theoretical fundamentals of particle filtering, an advanced Bayesian estimation method which can deal with non-Gaussian non-linear models and additive space-varying noise, and we introduce a hierarchical model and a fusion of multiple particle filters for the solution of the image separation problem. Our simulations on realistic astrophysical data show that the particle filter approach provides significantly better results in comparison with one of the most widespread algorithms for source separation (FastICA), especially in the case of low SNR.

Original languageEnglish
Pages (from-to)935-946
Number of pages12
JournalDigital Signal Processing: A Review Journal
Volume17
Issue number5
DOIs
Publication statusPublished - Sep 2007

Fingerprint

Source separation
Astrophysics
Blind source separation
Fusion reactions

Keywords

  • Bayesian source separation
  • Image separation
  • Non-stationary noise
  • Particle filtering
  • Sequential Monte Carlo

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Image separation using particle filters. / Costagli, Mauro; Kuruoǧlu, Ercan Engin.

In: Digital Signal Processing: A Review Journal, Vol. 17, No. 5, 09.2007, p. 935-946.

Research output: Contribution to journalArticle

Costagli, Mauro ; Kuruoǧlu, Ercan Engin. / Image separation using particle filters. In: Digital Signal Processing: A Review Journal. 2007 ; Vol. 17, No. 5. pp. 935-946.
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