Abstract
In recent years, deep learning has been widely applied to single image super-resolution(SISR). However, the majority of deep learning methods employ the Mean Square Error(MSE) loss as the objective optimization function, and the generated results are frequently too smooth and lack of details. In addition, the high-frequency information of the reconstructed image is severely lost, resulting in a generated image with poor visual effects. In order to address the aforementioned issues, this paper proposes a super-resolution network (RRFDB-GAN) with a receptive field module with a generative adversarial network as the main framework. The network adopts the receptive field block (RFB), which enables it to extract the features in multiple scales and to improve the discriminability. In this paper, the Residual in Residual Dense Block (RRDB) and the Residual of Receptive Field Dense Block (RRFDB) are combined into a new module, called Basic block. This module enhances the capability of feature reconstruction for low-resolution images. During the upsampling stage, a combination of Nearest Neighborhood Interpolation and Sub-pixel convolution is used to reduce the computational complexity and provide additional contextual information for super-resolution reconstruction, while achieving satisfactory performance. Finally, the four Basic blocks are integrated with the upsampling module into a simple end-to-end framework. Extensive experimental results demonstrate that the proposed method in this paper shows more details on the five test sets and outperforms other methods in terms of quantitative metrics and perception assessment.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (Grant No. U1908214, 61906032), Special Project of Central Government Guiding Local Science and Technology Development (Grant No. 2021JH6/10500140), Program for the Liaoning Distinguished Professor, Program for Innovative Research Team in University of Liaoning Province (Grant No. LT2020015), Program for Innovative Research Team in University of Liaoning Province (Grant No. LT2020015), the Science and Technology Innovation Fund of Dalian (Grant No. 2020JJ25CY001), the Fundamental Research Funds for the Central Universities under grant DUT21TD107.
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Zhang, W., Hou, Y., Fan, W. et al. Perception-oriented Single Image Super-Resolution Network with Receptive Field Block. Neural Comput & Applic 34, 14845–14858 (2022). https://doi.org/10.1007/s00521-022-07341-y
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DOI: https://doi.org/10.1007/s00521-022-07341-y