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张玲艳，闫丽，王大凯

Probability theory based model for image gradient classification and its application in edge detection

ZHANG Ling-yan，YAN Li，WANG Da-kai

计算机工程与应用 . 2010, (18): 180 -182 . DOI: 10.3778/j.issn.1002-8331.2010.18.056