Cited by 623Image and Signal Denoising MethodsImage Enhancement TechniquesAdvanced Data Compression Techniques

A New SURE Approach to Image Denoising: Interscale Orthonormal Wavelet Thresholding

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Luisier, Florian, Blu, Thierry, Unser, Michael·2007·IEEE Transactions on Image Processing

Abstract

This paper introduces a new approach to orthonormal wavelet image denoising. Instead of postulating a statistical model for the wavelet coefficients, we directly parametrize the denoising process as a sum of elementary nonlinear processes with unknown weights. We then minimize an estimate of the mean square error between the clean image and the denoised one. The key point is that we have at our disposal a very accurate, statistically unbiased, MSE estimate--Stein's unbiased risk estimate--that depends on the noisy image alone, not on the clean one. Like the MSE, this estimate is quadratic in the unknown weights, and its minimization amounts to solving a linear system of equations. The existence of this a priori estimate makes it unnecessary to devise a specific statistical model for the wavelet coefficients. Instead, and contrary to the custom in the literature, these coefficients are not considered random anymore. We describe an interscale orthonormal wavelet thresholding algorithm based on this new approach and show its near-optimal performance--both regarding quality and CPU requirement--by comparing it with the results of three state-of-the-art nonredundant denoising algorithms on a large set of test images. An interesting fallout of this study is the development of a new, group-delay-based, parent-child prediction in a wavelet dyadic tree.

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Research works printed but not linked: 4

  1. E. P. Simoncelli, Bayesian Interference in Wavelet Based Models, ser. Lecture Notes in Statistics. New York: Springer-Verlag, Mar. 1999, vol. 141, ch. 18, pp. 291-308.
  2. Dr. Blu is the recipient of the 2003 best paper award (SP Theory and Methods) from the IEEE Signal Processing Society. He is currently an Associate Editor for the IEEE TRANSACTIONS ON IMAGE PROCESSING and, since 2006, for the IEEE TRANSACTIONS ON SIGNAL PROCESSING.
  3. Michael Unser (M'89-SM'94-F'99) received the M.S. (summa cum laude) and Ph.D. degrees in elec- trical engineering from the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland, in 1981 and 1984, respectively. From 1985 to 1997, he was a Scientist with the Na- tional Institutes of Health, Bethesda, MD. He is now a Professor and Director of the Biomedical Imaging Group, EPFL. His main research topics are biomed- ical image processing, splines, and wavelets. He is the author of over 120 published journal papers in these areas.
  4. Dr. Unser has been actively involved with the IEEE TRANSACTIONS ON MEDICAL IMAGING, holding the positions of Associate Editor (1999-2002 and 2006-present), member of steering committee, and Associate Editor-in-Chief (2003-2005). He has acted as an Associate Editor or member of the edito- rial board for eight more international journals, including the IEEE Signal Processing Magazine, the IEEE TRANSACTIONS ON IMAGE PROCESSING (1992-1995), and the IEEE SIGNAL PROCESSING LETTERS (1994-1998). He organized the first IEEE International Symposium on Biomedical Imaging (ISBI 2002). He currently chairs the technical committee of the IEEE-SP Society on Bio Imaging and Signal Processing (BISP), and well as the ISBI steering committee. He is a recipient of three Best Paper Awards from the IEEE Signal Processing Society.

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Authors
Luisier, F., Blu, T., & Unser, M.
Affiliations
École Polytechnique Fédérale de Lausanne (CH)
Venue
IEEE Transactions on Image Processing
Published
2007-03
Volume
16
Issue
3
Pages
593-606
ISSN
1057-7149 (ISSN-L)
OpenAlex
W2007203285
Cited by
623
References
30
Citations by year
2026: 5 · 2025: 11 · 2024: 14 · 2023: 16 · 2022: 21 · 2021: 17 · 2020: 26 · 2019: 39 · 2018: 39 · 2017: 45 · 2016: 45 · 2015: 49 · 2014: 63 · 2013: 38 · 2012: 47
FWCI
51.60
Type
journal article
Language
en
Open access
Locations
  • IEEE Transactions on Image Processing (publishedVersion)
  • PubMed (publishedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
Funders
  • National Science Foundation (200020)
  • École Polytechnique Fédérale de Lausanne
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (109415, 200020)
  • Centre d'Imagerie BioMédicale
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Image and Signal Denoising Methods
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Image Enhancement Techniques
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Data Compression Techniques
Keywords
image denoising, Stein's unbiased risk estimate, mean squared error estimation, wavelet coefficient modeling
MeSH terms
Algorithms, Artificial Intelligence, Image Enhancement, Image Interpretation, Computer-Assisted, Sensitivity and Specificity, Reproducibility of Results, Information Storage and Retrieval, Artifacts

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