基于块处理的直线型标志符高精度轮廓提取技术研究  

The research about high precise extraction of linear mark outline based on block operation algorithm

作　　者：家建奎[1] 齐敏[1] 李珂[2] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129 [2]西北工业大学自动化学院,陕西西安710129

出　　处：《电子设计工程》2014年第20期164-167,共4页Electronic Design Engineering

基　　金：西北工业大学研究生创业种子基金(Z2013080)

摘　　要：近年来,SMT技术作为新一代的电子组装技术得到迅速发展,而其中PCB板标志符的准确识别已经成为影响锡膏印刷机定位校正精度的重要问题。本文针对锡膏印刷机中的正方形、十字形标志符,提出了一种有利于精确识别定位的快速轮廓提取方法。首先利用图像预处理技术得到标志符的二值图像,接着利用Hough变换检测出标志符轮廓中的主轴,最后使用块处理技术对标志符区域进行了直线化处理,得到了标志符的精确轮廓。试验结果表明,与传统的最小二乘拟合比较,本方法能够准确地提取出正方形、十字形和由正方形拼接的标志符。With the rapid development of surface mounting technology,the accurate identification of PCB mark that will affect the surface mounting precision is becoming more and more important.The purpose of this paper is to propose a algorithm for rapid detecting PCB mark aiming at the square and cross PCB mark.first of all,the PCB mark binary image is obtained after a series of preprocessing.Then the hough transformation is used to detect domain line of PCB mark region.finally,The PCB mark region is refined and fitted by a block operation algorithm to get the rectilinear boundaries,and then the rectilinear contours are extracted by boundary tracking.The experience shows that our method is more accurate than the traditional least squares fitting method in detecting square and cross PCB mark.

关 键 词：HOUGH变换 轮廓提取 PCB标识符 直线化 

分 类 号：TN911.73[电子电信—通信与信息系统]