find a bug in image_list.py file about the functiion of from_tensors()

[lqs19881030]

@dennis-park-TRI I found a bug in the project of the image_list.py about the function of from_tensors().When padding image,I think that the intrinsics of the image can make a difference(for example cx,cy).I misunderstand it or It is indeed wrong?Looking forward to your reply.Thank you...