FaceTracker?
http://www.myu.ac.jp/~xkozima/lab/ofTutorial3.html
GoPro?
GoPro?
GoPro?
http://www.interaction-ipsj.org/archives/paper2011/interactive/0237/2INH-8.pdfhttps://webspace.utexas.edu/yl3663/~ylee/shadowdraw/shadowdraw.html