Jirka Borovec

Probably investigate some numerical instability in GraphCut, compute the global energy with and without assimilated the small region (bottom right).

"Have you looked at opengm? I'm pretty sure they have their own implementation. Opencv does, too..." https://github.com/amueller/gco_python/issues/18

Have look at https://networkx.github.io

probably can be solved by #21

well, we can set the Bolts as models to register, but still, for getting weights we need some heavy GPU machines...

> hi, I would like to help with this issue. Great! Let's sync up also with the Bolts refactoring =)

I would agree with the first usage example, define `_TORCHVISION_AVAILABLE` in relevant upper level init or even in `pl_bolts.__init__` but then we do not need to define extra Contex class,...

I start playing with conditional imports at https://github.com/PyTorchLightning/pytorch-lightning/pull/4859 https://github.com/PyTorchLightning/pytorch-lightning/pull/4860 but it seems it does not work as I would expect, happy to hear some suggestions :]

@HenryJia mind send a PR? :]

@sid-sundrani @HenryJia anyone wants to take it over and send a PR?