I can not get the same value with matlab's

[spnova12]

I am using your code.
But i can not get the same psnr with matlab's.
This is my code (https://github.com/spnova12/get_set5_psnr)
If you do not mind, please check my code.
I also put the matlab code I used on github together.

[sliu729]

Me too. The latest update results in different result when the target size is larger than the original.

[fatheral]

Dears spnova12, sliu729, thanks for your interest in my code.

Unfortunately, this code was implemented more than a year ago and can (and in the future definitely will) be not very correct due to the behavior of the new versions of Numpy as well as the new versions on MatLab (e.g. different ways of rounding, image processing etc).

But for this issue I will try to investigate if I have time (maybe the problem is indeed in the upscaling behavior only).

[sliu729]

Dear fatheral,

Thanks for your reply.
Indeed, it will be interesting to have the updated version for python 3 and upscaling test.

Dears spnova12, sliu729, thanks for your interest in my code.

Unfortunately, this code was implemented more than a year ago and can (and in the future definitely will) be not very correct due to the behavior of the new versions of Numpy as well as the new versions on MatLab (e.g. different ways of rounding, image processing etc).

But for this issue I will try to investigate if I have time (maybe the problem is indeed in the upscaling behavior only).

[spnova12]

Dear fatheral,

It would be appreciated if you could make this code more accurate.
In particular, I think this code will be the most important code linking MatLab to Python.

[cjsoft]

conversion from RGB to YCbCr may contribute to the difference as well.
I was doing VDSR using Pillow to preprocess my data, and I encountered the same problem.
I used imresize in this repo and Matlab formula to convert from rgb to ycbcr manually, and achieved a very close result to the matlab version.
Or your can just copy this https://blog.csdn.net/Jee_King/article/details/88626917
if you r using cv2, dont forget to convert is to rgb first.