Super-Resolution of Magnetic Resonance Images via Convex Optimization with Local and Global Prior Regularization and Spectrum Fitting
Joint Authors
Kawamura, Naoki
Yokota, Tatsuya
Hontani, Hidekata
Source
International Journal of Biomedical Imaging
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-09-02
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
Given a low-resolution image, there are many challenges to obtain a super-resolved, high-resolution image.
Many of those approaches try to simultaneously upsample and deblur an image in signal domain.
However, the nature of the super-resolution is to restore high-frequency components in frequency domain rather than upsampling in signal domain.
In that sense, there is a close relationship between super-resolution of an image and extrapolation of the spectrum.
In this study, we propose a novel framework for super-resolution, where the high-frequency components are theoretically restored with respect to the frequency fidelities.
This framework helps to introduce multiple simultaneous regularizers in both signal and frequency domains.
Furthermore, we propose a new super-resolution model where frequency fidelity, low-rank (LR) prior, low total variation (TV) prior, and boundary prior are considered at once.
The proposed method is formulated as a convex optimization problem which can be solved by the alternating direction method of multipliers.
The proposed method is the generalized form of the multiple super-resolution methods such as TV super-resolution, LR and TV super-resolution, and the Gerchberg method.
Experimental results show the utility of the proposed method comparing with some existing methods using both simulational and practical images.
American Psychological Association (APA)
Kawamura, Naoki& Yokota, Tatsuya& Hontani, Hidekata. 2018. Super-Resolution of Magnetic Resonance Images via Convex Optimization with Local and Global Prior Regularization and Spectrum Fitting. International Journal of Biomedical Imaging،Vol. 2018, no. 2018, pp.1-17.
https://search.emarefa.net/detail/BIM-1169521
Modern Language Association (MLA)
Kawamura, Naoki…[et al.]. Super-Resolution of Magnetic Resonance Images via Convex Optimization with Local and Global Prior Regularization and Spectrum Fitting. International Journal of Biomedical Imaging No. 2018 (2018), pp.1-17.
https://search.emarefa.net/detail/BIM-1169521
American Medical Association (AMA)
Kawamura, Naoki& Yokota, Tatsuya& Hontani, Hidekata. Super-Resolution of Magnetic Resonance Images via Convex Optimization with Local and Global Prior Regularization and Spectrum Fitting. International Journal of Biomedical Imaging. 2018. Vol. 2018, no. 2018, pp.1-17.
https://search.emarefa.net/detail/BIM-1169521
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169521