Method for the detection of concentric circles of photoelectric image of circular hole in printed circuit board

被引：0
作者：
Qiao N. [1 ,2 ]
Ye Y. [1 ]
Mo C. [3 ]
Wu Y. [1 ]
Liu L. [1 ]
机构：
[1] School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu
[2] Department of Physics and Electronics, Hunan University of Arts and Science, Changde
[3] College of Manufacturing Science and Engineering, Sichuan University, Chengdu
来源：
Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 01期
关键词：
Detection of concentric circles; Hough transform; Image processing; Point sets selection;
D O I：
10.3788/AOS20103001.0075
中图分类号：
学科分类号：
摘要：
In order to detect the center and radius of concentric circles of photoelectric image of circular hole effectively in printed circuit board (PCB), a novel method for the detection of concentric circles based on Hough transform was proposed. The method for the point sets selection of point Hough transform and the scan direction for image of searching the point sets were improved by using the geometrical characteristic of the concentric circles: The center of the concentric circles was obtained in the accumulative array firstly, radius was obtained by the mean of distance between the circle center and every edge points afterwards, both the circle center and the edge of the concentric circles were detected accordingly. After the contradistinctive experiments for the detection of photoelectric image of PCB positioning circlular hole obtained in reality, the detection method proposed in this paper has obvious advantage in the aspects of increasing detection precision, reducing memory space and time.
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页码：75 / 78
页数：3
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