conda install theano opencv
pip install enhance
enhance lena.jpg
Also optionally accepts output path as second argument
enhance doubles an image's resolution. You can achieve any power-of-two upsampling through recursive calls, but unless you have a beastly workstation I don't recommend it.
Lenna and 4x upsampled Lenna
I do do machine learning, but I did not teach these machines. Just wanted to make this easily installable and usable.
All credit goes to corochann.