Osamu Izuta Jun Nakamura Toshiki Sato Sachiko Kodama Hideki Koike Kentaro Fukuchi Kaoru Shibasaki Haruko Mamiya Digital sports using the "Bouncing Star" rubber ball comprising IR and full-color LEDs and an acceleration sensor. 13 2008 SIGGRAPH New Tech Demos http://doi.acm.org/10.1145/1401615.1401628 conf/siggraph/2008demos db/conf/siggraph/siggraph2008demo.html#IzutaNSKKFSM08