Naixiang Lian Vitali Zagorodnov Yap-Peng Tan Retinal Vessel Detection using Self-Matched Filtering. 33-36 2007 ICIP (6) http://dx.doi.org/10.1109/ICIP.2007.4379514 conf/icip/2007 db/conf/icip/icip2007-6.html#LianZT07