The team behind Detectron have published an enormous amount of really good research, but the Detectron codebase struck me as "good research code" rather than something you'd ideally want in production.
Of course, I'm not criticising the fact that they publish those models, nor the models themselves.
But even publishing arguably polished python2 code in 2018 is something I take issue with if it's not a legacy code base
black_puppydog|8 years ago