Question about the HF map

[Exuan148]

Hi, I use the "sobel" function written in you scripts, and I did not change any parameters, and I got this,

I think it is little different from that of your paper, I would like to ask how to set threshold or kernal size or others to make the same HF map as in your paper. And, does these arguments matters? How did you set these parameters while training? Thanks!

[XavierCHEN34]

Hi, first you might get the wrong RGB order. Second, after the Sobel operation, we filter out the background using a mask.