Extraction of characters from color documents. - Hideo Kasuga; Masayuki Okamoto; Hiroaki Yamamoto (Document Recognition and Retrieval, 2000)

Color quantization using the fast K-means algorithm. - Hideo Kasuga; Hiroaki Yamamoto; Masayuki Okamoto (Syst. Comput. Jpn., 2000)

A Proposal of Programming Learning System with Reading Aloud "ONDOKU". - Mari Ueda; Nobuyuki Ishikawa; Kodai Odagiri; Hideo Kasuga; Tetsuo Tanaka (IIAI-AAI, 2022)