Abstract
Compressed sensing (CS) technique can sample and compress simultaneously. Since an image contains a huge amount of information, block CS (BCS) technique has appeared. This technique can divide image signals into non-overlapping sub-blocks and all the sub-blocks are processed separately. In classical BCS, translations of coefficients may cause signal losses when constructing sparse matrices. Therefore, reconstructed images are unsatisfactory at low sparsity. In this paper, we propose an improved BCS (IBCS). Our implementation is based on Mallat reconstruction algorithm to construct a non-square sparse matrix, it can retain more information of original signals. The reconstruction quality is more stable at different sparsity. Two experiments demonstrate that the reconstruction quality of the proposed IBCS is better than that of CBCS at lower sparsity and the implementation cost is reduced.
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Communicated by Eduardo Souza de Cursi.
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Du, H., Lin, H. Image reconstruction based on improved block compressed sensing. Comp. Appl. Math. 41, 4 (2022). https://doi.org/10.1007/s40314-021-01706-0
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DOI: https://doi.org/10.1007/s40314-021-01706-0