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Second and third experiments’ sets: (a) Calibration; (b) tracking; and (c) tapping tracking. In the calibration phase, the two subjects were identified by the Kinect, their features were calculated, averaged, and stored, and formed the KS. The SoI (subject of interest) for the first experiment was the left subject, and for the second, the right subject. For the tracking, the two subjects moved along and out of the range of the Kinect.
