Asanobu Kitamoto Makiko Onishi Tomohiro Ikezaki Dominique Deuff Eka Meyer Sonoko Sato Takako Muramatsu Ryo Kamida Takeo Yamamoto Kinji Ono Digital Bleaching and Content Extraction for the Digital Archive of Rare Books. 133-144 2006 conf/dial/2006 DIAL http://doi.ieeecomputersociety.org/10.1109/DIAL.2006.15 db/conf/dial/dial2006.html#KitamotoOIDMSMKYO06