基于双并行残差网络的遥感图像超分辨率重建

当面对目标地物尺寸差异性较大、复杂性较高的遥感图像时,图像超分辨率重建算法的重建效果较差.因此,文中提出双并行轻量级残差注意力网络,提高遥感图像重建效果.首先,提出多尺度浅层特征提取块,融合不同感受野的特征信息,解决遥感图像目标地物尺寸差异较大的问题.再设计基于非对称卷积和注意力机制的轻量级残差注意力块,既降低参数规模,又获取更多高频信息.然后,设计含有不同卷积核的并行网络框架,用于融合不同尺度的感受野.此外,多个残差块中使用跳跃连接融合不同阶段特征,增加信息复用性.最后,通过对比实验验证文中网络在遥感图像上具有较优的重建效果.

Remote Sensing Image Super-Resolution Reconstruction Based on Dual-Parallel Residual Network

The image super-resolution reconstruction algorithm generates a poor effect for the remote sensing images due to different sizes of ground objects and high complexity in the images. Aiming at this problem, a dual-parallel lightweight residual attention network is proposed to increase the reconstruction result. Firstly, a multi-scale shallow feature extraction block(MFEB) is put forward to gain the feature information of different receptive field sizes. The problem of the ground objects with different sizes can be solved by MFEB. Secondly, a lightweight residual attention block(LRAB) is designed with asymmetric convolution and attention mechanism. And thus, the model parameters are reduced and more high-frequency information is captured. Then, the parallel network with different convolution kernels is designed to fuse different receptive fields. Besides, lots of skip connections are employed in residual blocks to increase the reusability of information. Finally, experiments show that the proposed model produces superior performance.