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Regular Paper

Single Image Super-Resolution via Dynamic Lightweight Database with Local-Feature Based Interpolation

School of Software, Shandong University, Jinan 250101, China
Shandong Co-Innovation Center of Future Intelligent Computing, Yantai 264025, China
Digital Media Research Institute, Shandong University of Finance and Economics Jinan 250061, China
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Abstract

Single image super-resolution is devoted to generating a high-resolution image from a low-resolution one, which has been a research hotspot for its significant applications. A novel method that is totally based on the single input image itself is proposed in this paper. Firstly, a local-feature based interpolation method where both edge pixel property and location information are taken into consideration is presented to obtain a better initialization. Then, a dynamic lightweight database of self-examples is built with the aid of our in-depth study on self-similarity, from which adaptive linear regressions are learned to directly map the low-resolution patch into its high-resolution version. Furthermore, a gradually upscaling strategy accompanied by iterative optimization is employed to enhance the consistency at each step. Even without any external information, extensive experimental comparisons with state-of-the-art methods on standard benchmarks demonstrate the competitive performance of the proposed scheme in both visual effect and objective evaluation.

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Journal of Computer Science and Technology
Pages 537-549
Cite this article:
Ding N, Liu Y-P, Fan L-W, et al. Single Image Super-Resolution via Dynamic Lightweight Database with Local-Feature Based Interpolation. Journal of Computer Science and Technology, 2019, 34(3): 537-549. https://doi.org/10.1007/s11390-019-1925-9

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Received: 31 December 2018
Revised: 28 March 2019
Published: 10 May 2019
©2019 Springer Science + Business Media, LLC & Science Press, China
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