google doc with models https://docs.google.com/document/d/1hf4ov7rXHGIklApO_uMmjQLU3JaVwMob0Xc9GTFqtvE/edit?usp=sharing https://cmu-perceptual-computing-lab.github.io/openpose/web/html/doc/md_doc_01_demo.html#tracking
