Fig. 1. Generator network structure

Fig. 2. Multi-scale hybrid convolution structure

Fig. 3. Attention mechanism structure

Fig. 4. Discriminator network structure

Fig. 5. Loss function variation chart with iterations

Fig. 6. Comparison of the processing results of the seven methods

Fig. 7. PSNR of the result obtained by the model proposed in this paper and comparison methods

Fig. 8. SSIM of the result obtained by the model proposed in this paper and comparison methods

Fig. 9. UIQM of the result obtained by the model proposed in this paper and comparison methods

Fig. 10. NIQE of the result obtained by the model proposed in this paper and comparison methods

Fig. 11. Comparison of standard color card tests