HI @bodokaiser
for the 1. I think it is not the problem, because I’m normalizing the groundtuth to the range of {0,1} and the prediction after sigmoid is also in the range [0,1]. The BCELoss also is supposed to work with this range.
For 2, yeah maybe there is a problem with ConvTranspose2d. I will replace it with Upsampling and update you.