Xiangjian He Wenjing Jia Namho Hur Qiang Wu Jinwoong Kim Tom Hintz Bilateral Edge Detection on a Virtual Hexagonal Structure. 176-185 2006 conf/isvc/2006-2 ISVC (2) http://dx.doi.org/10.1007/11919629_19 db/conf/isvc/isvc2006-2.html#HeJHWKH06