How to convert PyTorch tensor to image and send it with flask?
Logically speaking, since the static image works, the error is somewhere in your getLinearImage code. I would suggest running things through using PDB (or a debugger of your choice) to figure out why it's not generated correctly.
That said, I create a variable in your code:
numpu = (numpy + 1) * 128which you don't seem to use, since you return the other variable afterwards:
return numpyCould that be your problem?
Also: I presume that when you created this, you saved the original image locally to ensure something gets generated in the first place?