20 May 2009 Method of circle detection in PCB optics image based on improved point Hough transform
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Abstract
The cause and method of pre-treatment of PCB optics image in the optics image detection were given at firstly; The method of circle detection based on traditional Hough transform (THT) was analyzed, and it's shortcomings were given; To overcome these shortcomings, a method which calls piont Hough transform (PHT) to evaluate the parameters of the circle was adopted, and it's basic principle was analyzed in detail., It has some advantages such as small amount of data, high precision and fast speed, but it has some shortcomings also. Accordingly, a method for evaluating the parameters of the circle based on improved PHT (IPHT) was proposed, which features smaller amount of data and faster speed than the method of the circle detection of the PHT; At last, the result of experiment for the circle detection of PCB optics image verified the superiority of the method.
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Naosheng Qiao, Naosheng Qiao, Yutang Ye, Yutang Ye, Yonglin Huang, Yonglin Huang, Lin Liu, Lin Liu, Yulin Wang, Yulin Wang, } "Method of circle detection in PCB optics image based on improved point Hough transform", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72832Y (20 May 2009); doi: 10.1117/12.828736; https://doi.org/10.1117/12.828736
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