It is very different to what Mike is doing. If you want to join Fanres, I think the details are over there.
We have our own in-house software that we have developed, that is now using deep learning tools to manage grain, along with a big database of different film stocks, and modelling the lens used in our scanner. It is complicated and a lot depends on what your target resolution is, which scanner is used with which lens, and the film stocks themselves.