Pose estimation of Peter Bone balancing two different lengths of pole on his head. Data source: https://www.youtube.com/watch?v=TcbArrTCoS0 (seconds 13 - 23).
Using convex hull to segment the sky. Detecting the balls using contour size. jugglegram/nhttps://github.com/smeschke/juggling/blob/master/convexHull_previous_points.py