Robust object extraction using normalized principal component features. - Eisaku Maeda; Hisako Tanaka; Akio Shio; Kenichiro Ishii (ICPR (3), 1992)

License plate recognition using gray image template matching with noise reduction filters and character alignment. - Yasuko Takahashi; Hisako Tanaka; Akira Suzuki; Akio Shio; Sakuichi Ohtsuka (Syst. Comput. Jpn., 2007)