Fig. 1. Comparison of ResNet and ResNeXt. (a) ResNet structure; (b) ResNeXt structure; (c) proposed residual structure

Fig. 2. Attention mechanism

Fig. 3. Flowchart of improved network

Fig. 4. Generator network structure

Fig. 5. Discriminator network structure

Fig. 6. Effect of cardinality number on module performance

Fig. 7. Experimental comparison result for image on BSD100 dataset. (a) Original image; (b) ResNeXt; (c) ResNeXt+SE; (d) ResNeXt+SimAM

Fig. 8. Comparison of reconstruction effect of "baby" on Set5 dataset

Fig. 9. Comparison of reconstruction effect of “foreman” on Set14 dataset

Fig. 10. Comparison of reconstruction effect of “3096” on BSD100 dataset