Abstract
The convolutional neural network plays an important role in single-image super-resolution reconstruction. In this study, we presented a branch residual pyramid channel network to reconstruct high-resolution image from single low-resolution image. Specifically, the low-level information was reconstructed based on the low-resolution image features. Then, we completed the characteristics of the advanced information mapping of the residual neural network. A different number of serial sequence and cross-combined convolution repeatedly were applied to strengthen the key information of mining capacity which increased the multi-branch structure while kept the direct path, we used. In addition, a feature pyramid channel attention module (feature maps aggregated through a top–down path) in each horizontal connection was utilized which generate more targeted feature maps. Experimental results with extensive quantitative and qualitative evaluation on benchmark data sets demonstrated that the proposed algorithm is not only superior to the existing advanced algorithms in speed and accuracy, but also shows good effect in super-resolution reconstruction of single image. Specifically, performance of the proposed method is particularly outstanding on SET5 data set (PSNR value is 0.08 higher than that of the Subprime network), SET14 data set (PSNR value is 0.03 higher than that of the Subprime network) and Urban100 data set (PSNR value is 0.15 higher than that of the Subprime network) when the scaling factor is 2, 3 and 4, respectively.
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Ou, J., Xia, H., Huo, W. et al. Single-image super-resolution based on multi-branch residual pyramid network. J Real-Time Image Proc 18, 2569–2581 (2021). https://doi.org/10.1007/s11554-021-01150-7
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DOI: https://doi.org/10.1007/s11554-021-01150-7