Abstract
In this paper, we propose a non-local network routingĀ (NNR) approach for perceptual image super-resolution. Unlike conventional methods which generate visually-faked textures due to exiting hand-designed losses, our approach aims to globally optimize both procedures of learning an optimal perceptual loss and routing a spatial-adaptive network architecture in a unified reinforcement learning framework. To this end, we introduce a reward function to teach our objective to pay more attention on the visual quality of the super-resolved image. Moreover, we carefully design an offset operation inside the neural architecture search space, which typically deforms the receptive field on boundary refinement in a non-local manner. Experimentally, our proposed method surpasses the perceptual performance over state-of-the-art methods on several widely-evaluated benchmark datasets.
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Acknowledgement
This work was supported in part by the National Science Foundation of China under Grant 61806104 and 62076142, in part by the West Light Talent Program of the Chinese Academy of Sciences under Grant XAB2018AW05, and in part by the Youth Science and Technology Talents Enrollment Projects of Ningxia under Grant TJGC2018028.
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Ji, Z., Dong, X., Li, Z., Yu, Z., Liu, H. (2021). Non-local Network Routing for Perceptual Image Super-Resolution. In: Ma, H., et al. Pattern Recognition and Computer Vision. PRCV 2021. Lecture Notes in Computer Science(), vol 13021. Springer, Cham. https://doi.org/10.1007/978-3-030-88010-1_14
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