Image Super-Resolution Based on Sparse Coding with Multi-Class Dictionaries

Year, pages: 2019, 1301 - 1319

Sparse coding-based single image super-resolution has attracted much interest. In this paper, a super-resolution reconstruction algorithm based on sparse coding with multi-class dictionaries is put forward. We propose a novel method for image patch classification, using the phase congruency information. A sub-dictionary is learned from patches in each category. For a given image patch, the sub-dictionary that belongs to the same category is selected adaptively. Since the given patch has similar pattern with the selected sub-dictionary, it can be better represented. Finally, iterative back-projection is used to enforce global reconstruction constraint. Experiments demonstrate that our approach can produce comparable or even better super-resolution reconstruction results with some existing algorithms, in both subjective visual quality and numerical measures.

Liao, X., Bai, K., Zhang, Q., Jia, X., Liu, S., Zhan, J. 2019. Image Super-Resolution Based on Sparse Coding with Multi-Class Dictionaries. In Computing and Informatics, vol. 38, no.6, pp. 1301-1319. 1335-9150. DOI: https://doi.org/10.31577/cai_2019_6_1301

Liao, X., Bai, K., Zhang, Q., Jia, X., Liu, S., Zhan, J. (2019). Image Super-Resolution Based on Sparse Coding with Multi-Class Dictionaries. Computing and Informatics, 38(6), 1301-1319. 1335-9150. DOI: https://doi.org/10.31577/cai_2019_6_1301

Publisher: Ústav informatiky SAV