Efficient Image Super-Resolution using Vast-Receptive-Field Attention

• URL: http://arxiv.org/abs/2210.05960v1
• Date: Wed, 12 Oct 2022 07:01:00 GMT
• Title: Efficient Image Super-Resolution using Vast-Receptive-Field Attention
• Authors: Lin Zhou, Haoming Cai, Jinjin Gu, Zheyuan Li, Yingqi Liu, Xiangyu Chen, Yu Qiao, Chao Dong
• Abstract summary: The attention mechanism plays a pivotal role in designing advanced super-resolution (SR) networks. In this work, we design an efficient SR network by improving the attention mechanism. We propose VapSR, the VAst-receptive-field Pixel attention network.
• Score: 49.87316814164699
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The attention mechanism plays a pivotal role in designing advanced super-resolution (SR) networks. In this work, we design an efficient SR network by improving the attention mechanism. We start from a simple pixel attention module and gradually modify it to achieve better super-resolution performance with reduced parameters. The specific approaches include: (1) increasing the receptive field of the attention branch, (2) replacing large dense convolution kernels with depth-wise separable convolutions, and (3) introducing pixel normalization. These approaches paint a clear evolutionary roadmap for the design of attention mechanisms. Based on these observations, we propose VapSR, the VAst-receptive-field Pixel attention network. Experiments demonstrate the superior performance of VapSR. VapSR outperforms the present lightweight networks with even fewer parameters. And the light version of VapSR can use only 21.68% and 28.18% parameters of IMDB and RFDN to achieve similar performances to those networks. The code and models are available at url{https://github.com/zhoumumu/VapSR.

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