Dan Koppel Yuan-Fang Wang Hua Lee Viewing Enhancement in Video-Endoscopy. 304-308 2002 conf/wacv/2002 WACV http://csdl.computer.org/comp/proceedings/wacv/2002/1858/00/18580304abs.htm db/conf/wacv/wacv2002.html#KoppelWL02