Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain

J. Portilla, V. Strela, M. J. Wainwright, Eero Simoncelli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We describe a statistical model for images decomposed in an overcomplete wavelet pyramid. Each coefficient of the pyramid is modeled as the product of two independent random variables: an element of a Gaussian random field, and a hidden multiplier with a marginal log-normal prior. The latter modulates the local variance of the coefficients. We assume subband coefficients are contaminated with additive Gaussian noise of known covariance, and compute a MAP estimate of each multiplier variable based on observation of a local neighborhood of coefficients. Conditioned on this multiplier, we then estimate the subband coefficients with a local Wiener estimator. Unlike previous approaches, we (a) empirically motivate our choice for the prior on the multiplier; (b) use the full covariance of signal and noise in the estimation; (c) include adjacent scales in the conditioning neighborhood. To our knowledge, the results are the best in the literature, both visually and in terms of squared error.

Original languageEnglish (US)
Title of host publicationIEEE International Conference on Image Processing
Pages37-40
Number of pages4
Volume2
StatePublished - 2001
EventIEEE International Conference on Image Processing (ICIP) - Thessaloniki, Greece
Duration: Oct 7 2001Oct 10 2001

Other

OtherIEEE International Conference on Image Processing (ICIP)
CountryGreece
CityThessaloniki
Period10/7/0110/10/01

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Random variables
Statistical Models

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Portilla, J., Strela, V., Wainwright, M. J., & Simoncelli, E. (2001). Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain. In IEEE International Conference on Image Processing (Vol. 2, pp. 37-40)

Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain. / Portilla, J.; Strela, V.; Wainwright, M. J.; Simoncelli, Eero.

IEEE International Conference on Image Processing. Vol. 2 2001. p. 37-40.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Portilla, J, Strela, V, Wainwright, MJ & Simoncelli, E 2001, Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain. in IEEE International Conference on Image Processing. vol. 2, pp. 37-40, IEEE International Conference on Image Processing (ICIP), Thessaloniki, Greece, 10/7/01.
Portilla J, Strela V, Wainwright MJ, Simoncelli E. Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain. In IEEE International Conference on Image Processing. Vol. 2. 2001. p. 37-40
Portilla, J. ; Strela, V. ; Wainwright, M. J. ; Simoncelli, Eero. / Adaptive Wiener denoising using a Gaussian scale mixture model in the wavelet domain. IEEE International Conference on Image Processing. Vol. 2 2001. pp. 37-40
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