8连通和4连通边缘跟踪中的梯度函数
赵京东,叶传秀
Gradient functions in eight connectivity and four connectivity edge tracking
ZHAO Jing-dong,YE Chuan-xiu
计算机工程与应用 . 2008, (33): 181 -183 .  DOI: 10.3778/j.issn.1002-8331.2008.33.055