A dev mmdet version for BDD100k(https://arxiv.org/abs/1805.04687)
1: install bdd100k tools: https://github.com/bdd100k/bdd100k
pip install bdd100k
2: install scalabel: https://github.com/scalabel/scalabel
3: BDD2COCO
python bdd100k.label.to_coco det -i ... -o ....