Cannot reproduce the result in the paper.

[TIEHua]

Hi, I use python train.py --scale 4 --patch_size 192 to train the ESRT but get 32.07/0.8919 (PNSR/SSIM) on Set5, which has a certain difference with the results in the original paper. I check the hyper-parameters in training code, which is same with them in paper. I don't know what went wrong, can you please tell me the training parameters when training the model ？

[ZQ-perfect]

can you tell me how to use the pngtonpy.py