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| Content Provider | IET Digital Library |
|---|---|
| Author | Kim, Yookyung Oh, Han Bilgin, Ali |
| Abstract | Super resolution (SR) reconstruction is often considered to be an inverse problem in the sense that unknown high resolution images are sought for giving low resolution images. Recent studies have shown that the sparsity regularisation used in compressed sensing (CS) reconstruction improves the performance of SR reconstruction. Furthermore, under the assumption that mutually similar regions exist within a natural image, non-local (NL) estimation produces accurate estimates for given degraded images. The incorporation of this NL estimation in SR reconstruction has been shown to yield better reconstructions. In this study, the authors propose the use of block matching and three-dimensional filtering with sharpening estimation as the regularisation constraint under the CS-based SR framework. This estimation collects similar blocks and adaptively filters them by the shrinkage of the transform coefficients. It recovers detailed structures while attenuating ringing artefacts. In addition, a sharpening technique used in the estimation also emphasises edges. As a result, the proposed SR algorithm searches for the solution that is similar to this enhanced estimate from among all feasible solutions. The experimental results demonstrate that the proposed method provides high-quality SR images, both numerically and subjectively. |
| Starting Page | 1048 |
| Ending Page | 1056 |
| Page Count | 9 |
| ISSN | 17519659 |
| Volume Number | 9 |
| e-ISSN | 17519667 |
| Issue Number | Issue 12, Dec (2015) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-ipr/9/12 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2014.0566 |
| Journal | IET Image Processing |
| Publisher Date | 2015-12-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | 3D Filtering Adaptive Filter Block Matching Compressed Sensing Compressed Sensing Reconstruction Computer Vision And Image Processing Technique Estimation Theory Filtering Method in Signal Processing High Resolution Image Image And Video Coding Image Filtering Image Matching Image Recognition Image Reconstruction Image Resolution Inverse Problem Low Resolution Image Mathematical Analysis Natural Image Nonlocal Estimation Sharpening Estimation Sparsity Regularisation Statistics Stereo Image Processing Super Resolution Reconstruction |
| Content Type | Text |
| Resource Type | Article |
| Subject | Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software |
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