Hello, I am trying to reproduce the results from the paper also.
I came to realize that you were using alpha = 1 here. But the paper mentioned:
In our experiments we used ฮฑ = 1, i.e. we changed the value of each pixel only by 1 on each step.
From my understanding, the ฮฑ in the paper should be transformed according to the scale of the image. And since you have scaled the image, ฮฑ should at the same time transformed as 1/255.
Could you explain a bit about the reason of using alpha = 1? Or did I misunderstand some part of the code?