ABSTRACT
Th is system of Heemin [Hamin06] (we call it Heemin in this chapter) assumes that lights have a fi xed position over the time of Illuminator’s control; but Heemin does not require knowledge of characteristics and locations of lights. Tracking and spotlighting using pan-tilt mounts is a well-known technology and can be implemented easily [Spo]. Heemin does allow mobile stage elements, equipment, and actors l it through these fi xed l ighting instruments, using mobile tags. Tag is a si ngle entity that can sense light intensity and know its location.
