D.A. Karras
New PDE-based methods for image enhancement using SOM and Bayesian inference in various discretization schemes
Karras, D.A.; Mertzios, G.B.
Abstract
A novel approach is presented in this paper for improving anisotropic diffusion PDE models, based on the Perona–Malik equation. A solution is proposed from an engineering perspective to adaptively estimate the parameters of the regularizing function in this equation. The goal of such a new adaptive diffusion scheme is to better preserve edges when the anisotropic diffusion PDE models are applied to image enhancement tasks. The proposed adaptive parameter estimation in the anisotropic diffusion PDE model involves self-organizing maps and Bayesian inference to define edge probabilities accurately. The proposed modifications attempt to capture not only simple edges but also difficult textural edges and incorporate their probability in the anisotropic diffusion model. In the context of the application of PDE models to image processing such adaptive schemes are closely related to the discrete image representation problem and the investigation of more suitable discretization algorithms using constraints derived from image processing theory. The proposed adaptive anisotropic diffusion model illustrates these concepts when it is numerically approximated by various discretization schemes in a database of magnetic resonance images (MRI), where it is shown to be efficient in image filtering and restoration applications.
Citation
Karras, D., & Mertzios, G. (2009). New PDE-based methods for image enhancement using SOM and Bayesian inference in various discretization schemes. Measurement Science and Technology, 20(10), Article 104012. https://doi.org/10.1088/0957-0233/20/10/104012
Journal Article Type | Article |
---|---|
Publication Date | 2009-10 |
Deposit Date | Dec 8, 2011 |
Journal | Measurement Science and Technology |
Print ISSN | 0957-0233 |
Electronic ISSN | 1361-6501 |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 20 |
Issue | 10 |
Article Number | 104012 |
DOI | https://doi.org/10.1088/0957-0233/20/10/104012 |
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