智能手机PCBA圆形焊点轮廓自适应提取  

An Adaptive Contour Extraction Algorithm for Circular Solder Joints in PCBA of Smart Phone

作　　者：闫河 刘伦宇 陈早早 莫佳迪 刘继红 Yan He;Liu Lunyu;Chen Zaozao;Mo Jiadi;and Liu Jihong(School of Artificial Intelligence,Chongqing University of Technology,Chongqing 401147)

机构地区：[1]重庆理工大学两江人工智能学院,重庆401147

出　　处：《计算机辅助设计与图形学学报》2023年第3期405-412,共8页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家重点研发计划“智能机器人”重点专项资助项目(2018YFB1308602);国家自然科学基金面上资助项目(61173184);重庆市自然科学基金(cstc2018jcyjAX0694).

摘　　要：智能手机印刷电路板装配(printed circuit board assembly,PCBA)集成度高、焊点间隙小,小视场下成像易引入噪声,圆形焊点边缘粘合、断缺现象明显,导致圆形焊点轮廓提取准确性不高.为此,提出PCBA圆形焊点轮廓自适应提取算法.首先,采用引导滤波算法,在有效地抑制噪声的同时捕捉圆形焊点边缘梯度信息;其次,依据自适应OTSU分割算法实现焊点区域分割,采用8邻域边界跟踪算法及Canny算子提取圆形焊点轮廓信息;最后,利用圆形焊点的轮廓几何特性和边缘滑动窗口机制对轮廓信息进行筛选,从而获得更精细的圆形焊点轮廓.在实验设备采集的90幅PCBA图像数据集上与3种典型方法进行实验的结果表明,所提算法的精确率、召回率、F值分别为96.96%,97.88%,97.42%,运行时间为310 ms,可快速、有效地提取出PCBA圆形焊点轮廓.Because of high integration and narrow gap between solder joints in PCBA(printed circuit board assembly)of smart phone,there is some noise in the image of PCBA inevitably and the edge of circular solder joint is obviously bonded and broken.That easily leads to the low accuracy of circular solder joint contour extraction.Therefore,an adaptive extraction algorithm of PCBA circular solder joint contour is proposed.Firstly,the guided filtering algorithm is used to effectively suppress the noise and capture the edge gradient information of circular solder joint.Secondly,the solder joint region is segmented according to the adaptive OTSU segmentation algorithm,and the contour information of circular solder joint is extracted by 8-neighborhood boundary tracking algorithm and Canny operator.Finally,the contour information is filtered by using the contour geometric characteristics of circular solder joint and the edge sliding window mechanism to obtain a finer contour of circular solder joint.The experimental results on 90 PCBA image data sets collected by the experimental equipment and three typical methods show that the accuracy,recall and F-score value of the proposed algorithm are 96.96%,97.88%and 97.42%,respectively,and the running time is 310 ms.The contour of PCBA circular solder joint can be extracted quickly and effectively.

关 键 词：PCBA 自适应OTSU分割算法 引导滤波 边缘滑动窗口 轮廓提取 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]