Github: https://github.com/ACI-Institute/faces4coco

Over half of the 120,000 images in the 2017 COCO(Common Objects in Context) dataset contain people, and while COCO’s bounding box annotations include some 90 different classes, there is only one class for people. Those bounding boxes encompass the entire body of the person (head, body, and extremities), but being able to detect and isolate specific parts is useful and has many applications in machine learning. Detecting faces in particular is useful, so we’ve created a dataset that adds faces to COCO.