The model uses image patch as input, how to calculate the PSNR value of the whole image

[GZ-T]

Hi, I'm a beginner of image super resolution, thank you for your great job, which has taught me a lot. I have a problem with calculating the PSNR value of the whole image, I have a question about calculating the PSNR value of the whole image. Do you calculate the PSNR value of each patch in an image first and then average it to get the PSNR value of the whole image，and how to deal with the problem that the image size can't divide the crop size?

[LongguangWang]

Hi @GZ-T, thanks for your interest in our work. We crop patches to train our SR network but feed the whole image to the network for evaluation during test phase. Consequently, the PSNR value is calculated directly over the whole image.

[GZ-T]

Thank you for your answer, it's very helpful to me.