摘要： 针对基于混合构架的图像超分模型通常需要较高计算成本的问题，提出了一种基于CNN-Transformer混合构架的轻量图像超分网络STSR（Swin Transformer based Single Image Super Resolution）。首先，提出了一种并行特征提取的特征增强模块（Feature Enhancement Block，FEB），由卷积神经网络（Convolutional Neural Network，CNN）和轻量型Transformer网络并行地对输入图像进行特征提取，再将提取到的特征进行特征融合。其次，设计了一种动态调整模块（Dynamic Adjustment，DA），使得网络能根据输入图像来动态调整网络的输出，减少网络对无关信息的依赖。最后，采用基准数据集来测试网络的性能，实验结果表明STSR在降低模型参数量的前提下仍然保持较好的重建效果。
A lightweight image super resolution method based on a hybrid CNN-Transformer architecture
Lin Chenghao, Wu Lijun
School of Physics and Information Engineering, Fuzhou University
Abstract： In order to address the problem that image super segmentation models based on hybrid architectures usually require high computational cost, this study proposes a lightweight image super segmentation network STSR (Swin Transformer based Single Image Super Resolution) based on a hybrid CNN-Transformer architecture. Firstly, this paper proposes a Feature Enhancement Block (FEB) for parallel feature extraction, which consists of a Convolutional Neural Network (CNN) and a lightweight Transformer Network to extract features from the input image in parallel, and then the extracted features are fused to the features. Secondly, this paper designs a Dynamic Adjustment (DA) module, which enables the network to dynamically adjust the output of the network according to the input image, reducing the network's dependence on irrelevant information. Finally, some benchmark datasets are used to test the performance of the network, and the experimental results show that STSR still maintains a better reconstruction effect under the premise of reducing the number of model parameters.
Key words : image superresolution; lightweighting; Convolutional Neural Network; Transformer
