Fig. 1. Generator network structure

Fig. 2. Discriminator network structure

Fig. 3. Use of channel and spatial attention modules

Fig. 4. Reconstruction effects with different values of ε coefficient

Fig. 5. Comparison of residual blocks. (a)SRGAN; (b) proposed model

Fig. 6. Variation curve of generator function loss value

Fig. 7. Variation curve of discriminant function loss value

Fig. 8. Partial enlarged comparison diagrams of the “baby” reconstruction effect of five algorithms in Set5 test set

Fig. 9. Partial enlarged comparison diagrams of the “butterfly” reconstruction effect of five algorithms in Set5 test set

Fig. 10. Partial enlarged comparison diagrams of the “pepper” reconstruction effect of five algorithms in Set14 test set

Fig. 11. Partial enlarged comparison diagrams of the “fish” reconstruction effect of five algorithms in BSDS100 test set

Fig. 12. Partial enlarged comparison diagrams of the “room” reconstruction effect of five algorithms in Urban100 test set

Fig. 13. Partial enlarged comparison diagrams of the “baby” reconstruction effect in ablation experiment in Set5 test set

Fig. 14. Partial enlarged comparison diagrams of the “butterfly” reconstruction effect in ablation experiment in Set5 test set

Fig. 15. Partial enlarged comparison diagrams of the “lenna” reconstruction effect in ablation experiment in Set14 test set