计算机科学 ›› 2022, Vol. 49 ›› Issue (11A): 210900202-8.doi: 10.11896/jsjkx.210900202
何鹏浩, 余映, 徐超越
HE Peng-hao, YU Ying, XU Chao-yue
摘要: 针对现有单图像超分辨率卷积神经网络存在模型参数过多以及重建失真过大的问题,提出了一种基于动态金字塔结构与子空间注意力模块的轻量级单图像超分辨率网络模型。首先,所采用的动态多尺度金字塔特征组合模块的网络主体由动态卷积和金字塔分组卷积构成。其次,动态卷积可以根据不同的图像内容自适应地进行不同的卷积操作,从而对不同的图像提取出不同的特征;金字塔分组卷积不仅可以更好地提取多尺度图像特征信息,而且能够有效降低网络模型的参数量。最后,在网络模型末端采用子空间注意力模块,将图像的通道空间分为多个子空间,并为每个子空间学习不同的注意力图,这样不仅可以更好地捕获图像的跨通道相关信息,而且可以有效融合各子空间的图像特征信息。与现有主流算法相比,所提方法不仅具有更小的网络模型参数量,而且重建出的超分辨率图像在视觉效果和定量分析方面均能取得更好的表现。
中图分类号:
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