Naoya Tokuda Takayuki Hoshino Takashi Watanabe Takuma Funahashi Takayuki Fujiwara Hiroyasu Koshimizu Facial Caricaturing Robot COOPER Exhibited at EXPO2005 and Its Improvements. 512-515 2007 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/2007CD/papers/13-20.pdf conf/mva/2007 db/conf/mva/mva2007.html#TokudaHWFFK07