Character String Extraction by Multi-stage Relaxation. - Hiroyuki Hase; Toshiyuki Shinokawa; Masaaki Yoneda; Mitsuru Sakai; Hiroshi Maruyama (ICDAR, 1997)

Character String Extraction from a Color Document. - Hiroyuki Hase; Toshiyuki Shinokawa; Masaaki Yoneda; Mitsuru Sakai; Hiroshi Maruyama (ICDAR, 1999)

Alignment of Free Layout Color Texts for Character Recognition. - Hiroyuki Hase; Masaaki Yoneda; Toshiyuki Shinokawa; Ching Y. Suen (ICDAR, 2001)

Character string extraction from color documents. - Hiroyuki Hase; Toshiyuki Shinokawa; Masaaki Yoneda; Ching Y. Suen (Pattern Recognit., 2001)

Recognition of Rotated Characters by Eigen-space. - Hiroyuki Hase; Toshiyuki Shinokawa; Masaaki Yoneda; Ching Y. Suen (ICDAR, 2003)

A Robust Method of Recognizing Multi-font Rotated Characters. - Hiroyuki Hase; Toshiyuki Shinokawa; Shogo Tokai; Ching Y. Suen (ICPR (2), 2004)