[12] 刘金保. 形状匹配算法研究及应用[D].广州：广东工业大学, 2011

[13] Zhang D.S., Lu G.J. Review of Shape Representation and Description Techniques[J]. Pattern Recognition 2004,37(1):1-19.

[14] LI Z, LIN Y, HUANG J, et al. Preprocess algorithm of PCB line detection[J]. Optics and Precision Engineering, 2007, 2(15): 272-276. 

[15] OPT Machine Vision , 2014