A scalable attention network for lightweight image super-resolution

IF 5.2 2区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS
Jinsheng Fang , Xinyu Chen , Jianglong Zhao , Kun Zeng
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引用次数: 0

Abstract

Modeling long-range dependencies among features has become a consensus to improve the results of single image super-resolution (SISR), which stimulates interest in enlarging the kernel sizes in convolutional neural networks (CNNs). Although larger kernels definitely improve the network performance, network parameters and computational complexities are raised sharply as well. Hence, an optimization of setting the kernel sizes is required to improve the efficiency of the network. In this work, we study the influence of the positions of larger kernels on the network performance, and propose a scalable attention network (SCAN). In SCAN, we propose a depth-related attention block (DRAB) that consists of several multi-scale information enhancement blocks (MIEBs) and resizable-kernel attention blocks (RKABs). The RKAB dynamically adjusts the kernel size concerning the locations of the DRABs in the network. The resizable mechanism allows the network to extract more informative features in shallower layers with larger kernels and focus on useful information in deeper layers with smaller ones, which effectively improves the SR results. Extensive experiments demonstrate that the proposed SCAN outperforms other state-of-the-art lightweight SR methods. Our codes are available at https://github.com/ginsengf/SCAN.
用于轻量级图像超分辨率的可扩展注意力网络
建立特征之间的长程依赖关系模型已成为改善单图像超分辨率(SISR)结果的共识,这激发了人们对扩大卷积神经网络(CNN)内核大小的兴趣。虽然增大内核肯定会提高网络性能,但网络参数和计算复杂度也会大幅提高。因此,需要对内核大小的设置进行优化,以提高网络的效率。在这项工作中,我们研究了较大内核的位置对网络性能的影响,并提出了一种可扩展的注意力网络(SCAN)。在 SCAN 中,我们提出了一种深度相关注意力块(DRAB),它由多个多尺度信息增强块(MIEB)和可调整大小的内核注意力块(RKAB)组成。RKAB 可根据 DRAB 在网络中的位置动态调整内核大小。这种可调整大小的机制允许网络在较浅的层中用较大的内核提取更多的信息特征,而在较深的层中用较小的内核关注有用的信息,从而有效地改善了 SR 结果。大量实验证明,所提出的 SCAN 优于其他最先进的轻量级 SR 方法。我们的代码见 https://github.com/ginsengf/SCAN。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
10.50
自引率
8.70%
发文量
656
审稿时长
29 days
期刊介绍: In 2022 the Journal of King Saud University - Computer and Information Sciences will become an author paid open access journal. Authors who submit their manuscript after October 31st 2021 will be asked to pay an Article Processing Charge (APC) after acceptance of their paper to make their work immediately, permanently, and freely accessible to all. The Journal of King Saud University Computer and Information Sciences is a refereed, international journal that covers all aspects of both foundations of computer and its practical applications.
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