Abstract
The recent advances in deep convolutional neural networks (DCNNs) have convincingly demonstrated high-capability reconstruction for single image super-resolution (SR). However, it is a big challenge for most DCNNs-based SR models when the scaling factor increases. In this paper, we propose a novel Progressive Residual Network (PRNet) to integrate hierarchical and scale features for single image SR, which works well for both small and large scaling factors. Specifically, we introduce a Progressive Residual Module (PRM) to extract local multi-scale features through dense connected up-sampling convolution layers. Meanwhile, by embedding residual learning into each module, the relative information between high-resolution and low-resolution multi-scale features is fully exploited to boost reconstruction performance. Finally, the scale-specific features are fused to the reconstruction module for restoring the high-quality image. Extensive quantitative and qualitative evaluations on benchmark datasets illustrate that our PRNet achieves superior performance and in particular obtains new state-of-the-art results for large scaling factors such as 4 × and 8 ×.
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Acknowledgments
This work is supported by National Nature Science Foundation of China (61472029, 51827813, 61473031), National Key R&D Program of China (2017YFB1201104, 2016YFB1200100), and Scientific Research Project of Beijing Educational Committee (SM20191001107; PXM 2019_014213_000007).
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Wan, J., Yin, H., Chong, AX. et al. Progressive residual networks for image super-resolution. Appl Intell 50, 1620–1632 (2020). https://doi.org/10.1007/s10489-019-01548-8
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DOI: https://doi.org/10.1007/s10489-019-01548-8