I am looking for an efficient head pose estimation algorithm from facial features.
What I already have: I already have implemented the code for stable facial landmarks(68 landmarks on the face). I also have the intrinsic camera parameters.
The task is to efficiently determine the head pose from webcam video i.e, (roll, yaw and pitch).
Which are the viable algorithms for the purpose?
I am working on python by the way, any working code for the same would be welcome.