Information Technology Reference
In-Depth Information
Tap
String and release
Attack
Flick
Press
Tilt
Figure 8.5
Five primitive gestures.
In the next section, we will explain a mechanism of input processing (i.e.,
motion capturing) and output processing (i.e., sound control) in detail. An
application of the gestures into music performance will be demonstrated in
Section 8.5.
8.4 Implementation
8.4.1 Capturing of gestures
Spatial and motion properties of the stick device in a 3-D space are extracted
by the system. Here, there are several possible object tracking techniques.
Capacitive sensing with a mesh-shaped antenna, or SmartSkin, is a smart
approach [22]. However, the sensing area is limited to the surface of the sens-
ing table. Use of a supersonic sensor is another possibility. It can catch the
height information, but doesn't work properly in a multiplayer collaboration
environment. Magnetic tracking technology shows good performance in
preciseness. However, we were afraid of the influence of magnetism caused
by the speakers. Also it is rather expensive.
