Algorithms for determination of body pose and real time tracking of head, hands and other organs, as well as gestures recognition of an isolated human video image are known, see e.g. C. Wren et al. ???Pfinder: real time tracking of the human body???, IEEE Transactions on Pattern Analysis and Machine Intelligence, 19(7):780-785, 1997 and A. Aagarwal and B. Triggs ???3D human pose from silhouettes b