creator	Matsukawa, Tetsu; Kurita, Takio;
journal title	Pattern Recognition
volume	Volume 45
issue	Issue 2
date of issued	2012

creator	Watanabe, Kenji; Hidaka, Akinori; Otsu, Nobuyuki; Kurita, Takio;
journal title	PLoS ONE
volume	Volume 7
issue	Issue 3
date of issued	2012