A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution
Joint Authors
Lu, Yixiang
Gao, Qingwei
Sun, Dong
Zhang, Dexiang
Xia, Yi
Wang, Hui
Source
Journal of Electrical and Computer Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-03-11
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Information Technology and Computer Science
Abstract EN
A novel method based on directionlet transform is proposed for image denoising under Bayesian framework.
In order to achieve noise removal, the directionlet coefficients of the uncorrupted image are modeled independently and identically by a two-state Laplacian mixture model with zero mean.
The expectation-maximization algorithm is used to estimate the parameters that characterize the assumed prior model.
Within the framework of Bayesian theory, the directionlet coefficients of noise-free image are estimated by a nonlinear shrinkage function based on weighted average of the minimum mean square error estimator.
We demonstrate through simulations with images contaminated by additive white Gaussian noise that the proposed method is very competitive when compared with other methods in terms of both peak signal-to-noise ratio and visual quality.
American Psychological Association (APA)
Lu, Yixiang& Gao, Qingwei& Sun, Dong& Zhang, Dexiang& Xia, Yi& Wang, Hui. 2015. A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution. Journal of Electrical and Computer Engineering،Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1068120
Modern Language Association (MLA)
Lu, Yixiang…[et al.]. A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution. Journal of Electrical and Computer Engineering No. 2015 (2015), pp.1-12.
https://search.emarefa.net/detail/BIM-1068120
American Medical Association (AMA)
Lu, Yixiang& Gao, Qingwei& Sun, Dong& Zhang, Dexiang& Xia, Yi& Wang, Hui. A Novel Directionlet-Based Image Denoising Method Using MMSE Estimator and Laplacian Mixture Distribution. Journal of Electrical and Computer Engineering. 2015. Vol. 2015, no. 2015, pp.1-12.
https://search.emarefa.net/detail/BIM-1068120
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1068120