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Single image super-resolution via global aware external attention and multi-scale residual channel attention network

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Abstract

Recently, deep convolutional neural networks (CNNs) have shown significant advantages in improving the performance of single image super-resolution (SISR). To build an efficient network, multi-scale convolution is commonly incorporated into CNN-based SISR methods via scale features with different perceptive fields. However, the feature correlations of the same sample are not fully utilized by the existing multi-scale SISR approaches, impeding the further improvement of reconstruction performance. In addition, the correlations between different samples are still left unexplored. To address these problems, this paper proposes a deep-connected multi-scale residual attention network (DMRAN) by virtue of the feature correlations of the same sample and the correlations between different samples. Specifically, we propose a deep-connected multi-scale residual attention block (DMRAB) to take fully advantage of the multi-scale and hierarchical features, which can effectively learn the local interdependencies between channels by adjusting the channel features adaptively. Meanwhile, a global aware external attention (GAEA) is introduced to boost the performance of SISR by learning the correlations between all the samples. Furthermore, we develop a deep feature extraction structure (DFES), which seamlessly combines the stacked deep-connected multi-scale residual attention groups (DMRAG) with GAEA to learn deep feature representations incrementally. Extensive experimental results on the public benchmark datasets show the superiority of our DMRAN to the state-of-the-art SISR methods.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grants 61801198 and 62276266.

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Correspondence to Bing Liu or Peng Liu.

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Mingming Liu and Sui Li are co-first authors.

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Liu, M., Li, S., Liu, B. et al. Single image super-resolution via global aware external attention and multi-scale residual channel attention network. Int. J. Mach. Learn. & Cyber. 15, 2309–2321 (2024). https://doi.org/10.1007/s13042-023-02030-1

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  • DOI: https://doi.org/10.1007/s13042-023-02030-1

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