Fig. 6From: Design and implement chords and personal windows for multi-user collaboration on a large multi-touch vertical display a In this figure, all five fingers touch the multi-touch surface (five fingers chord). In this example, the circular area has popped-up according to the index finger. b In this graph the diameter of the circular area is equal to 1. The relations of the finger touches and the position of the circle are shownBack to article page