Matthew J. McAuliffe David H. Eberly Daniel S. Fritsch Edward L. Chaney Stephen M. Pizer Scale-Space Boundary Evolution Initialized by Cores. 173-182 1996 conf/vbc/1996 VBC db/conf/vbc/vbc1996.html#McAuliffeEFCP96 http://dx.doi.org/10.1007/BFb0046952