Gengyu Ma Xueyin Lin Typical Sequences Extraction and Recognition. 60-71 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3058&spage=60 2004 conf/eccv/2004hci ECCV Workshop on HCI db/conf/eccv/eccv2004hci.html#MaL04