Masanori Anegawa Akira Nakamura Extraction of Character String Areas from Color Scenery Image Using Extended Psychological Potential Field. 298-301 2002 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/2002/papers/2002298.pdf conf/mva/2002 db/conf/mva/mva2002.html#AnegawaN02