A Classifier of Similar Characters using Compound Mahalanobis Function based on Difference Subspace. - Junichi Hirayama; Hidehisa Nakayama; Nei Kato (ICDAR, 2007)

Development of Template-Free Form Recognition System. - Junichi Hirayama; Hiroshi Shinjo; Toshikazu Takahashi; Takeshi Nagasaki (ICDAR, 2011)