Xuesong Shi

Hi @mobiiin , sorry I do not have any hints about your issues. tf 1.14 should work, see [environment.yml](https://github.com/cedrusx/deep_features/blob/master/environment.yml). And the code of `simple_nms` was copied from [hfnet](https://github.com/ethz-asl/hfnet), which specifies...