Figure 5.

The five different subject indexes assignments, which represent different KIs, for the two subject as of the Kinect device: the other subject assign to (a) the first index; (b) the SoI assigned to index 2; (c) the other subject assigned to index 3; (d) the SoI loses its index; (e) and assigned again with index 1. The same subject assignments are multiplexed, due to the lack of ability of Kinect to distinguish between the different subjects in different scenes. An identification of the SoI is essential in order to analyze the SoI motion.