Fast Single Image Super-Resolution via Self-Example Learning and Sparse Representation

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Authors Z. Zhu, F. Guo, H. Yu, and C. Chen
Journal/Conference Name IEEE Transactions on Multimedia
Paper Category
Paper Abstract In this paper, we propose a novel algorithm for fast single image super-resolution based on self-example learning and sparse representation. We propose an efficient implementation based on the K-singular value decomposition (SVD) algorithm, where we replace the exact SVD computation with a much faster approximation, and we employ the straightforward orthogonal matching pursuit algorithm, which is more suitable for our proposed self-example-learning-based sparse reconstruction with far fewer signals. The patches used for dictionary learning are efficiently sampled from the low-resolution input image itself using our proposed sample mean square error strategy, without an external training set containing a large collection of high-resolution images. Moreover, the l0-optimization-based criterion, which is much faster than l1-optimization-based relaxation, is applied to both the dictionary learning and reconstruction phases. Compared with other super-resolution reconstruction methods, our low dimensional dictionary is a more compact representation of patch pairs and it is capable of learning global and local information jointly, thereby reducing the computational cost substantially. Our algorithm can generate high-resolution images that have similar quality to other methods but with a greater than hundredfold increase in the computational efficiency.
Date of publication 2014
Code Programming Language MATLAB

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