Abstract
To make use of the prior knowledge of the image more effectively and restore more details of the edges and structures, a novel sparse coding objective function is proposed by applying the principle of the non-local similarity and manifold learning on the basis of super-resolution algorithm via sparse representation. Firstly, the non-local similarity regularization term is constructed by using the similar image patches to preserve the edge information. Then, the manifold learning regularization term is constructed by utilizing the locally linear embedding approach to enhance the structural information. The experimental results validate that the proposed algorithm has a significant improvement compared with several super-resolution algorithms in terms of the subjective visual effect and objective evaluation indices.
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This work has been supported by the National Natural Science Foundation of China (Nos.61672335 and 61602191), the Foundation of Fujian Education Department (No.JAT170053).
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Huang, Dt., Huang, Wq., Huang, H. et al. Application of regularization technique in image super-resolution algorithm via sparse representation. Optoelectron. Lett. 13, 439–443 (2017). https://doi.org/10.1007/s11801-017-7143-1
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DOI: https://doi.org/10.1007/s11801-017-7143-1