Before revision:  We evaluate our posture estimation approach from a haptic-input device by comparing it with the human posture estimates from a commercial motion capture system . Our results show that the proposed algorithm successfully estimates human posture based only on the trajectory of the haptic-input device stylus.
After revision:  We evaluate our posture estimation approach from a haptic-input device by comparing it with the human posture estimates from a commercial motion capture system and also two least-squares optimization approaches for human inverse kinematics. The results reveal that the proposed algorithm successfully estimates human posture based only on the trajectory of the haptic-input device stylus.