Stereo vision based intuitive posture input system using a portable color marked puppet

This paper suggests a new portable posture input system which consists of a stereo vision system, a color marked puppet, and a laptop computer. Using the puppet, we can intuitively input any posture which we want to represent. The puppet posture is recognized by the stereo vision. First, the color mark of each puppet joint is obtained and segmented. In this case, the normalized color technique is employed for robust color mark extraction. Then, the 3D positions of the segmented color marks are calculated by the epipolar geometry method. Using the obtained 3D positions, all joint angles of the puppet are represented as a quaternion. Therefore, the obtained joint quaternions determine the resultant posture of the human being model. Finally, the experimental results show the effectiveness and feasibility of the suggested posture input system.