To all those who work in robotics we would like to techniques to link digital image processing our robot, well here I put a video on how do that with C #, OpenCV and Arduino, we can control two actuators with the movement of the face, when the face moves in X and Y.
You have to polish it, but hey it's a start.
That is cool. The servo reaction is not smooth but like you say its a start. My first project is also about headtracking (but then mechanically) and I would like to built a plexiglas setup like you did, nice.