A Visual Inspection System for Surface Mounted Components Based on Color Features
The object of this study is to develop a reliable and fast visual inspection system for surface mounted components after they have been placed in wet solder paste on a printed circuit board (PCB). In order to reach this goal, firstly, the features of the components under three colors (red, greed, blue) structure light source are analyzed. Then, a twostages inspection process is presented. In the first stage, the horizontal and vertical integral projections of the component electrode were obtained after segmentation in the red subimage, based on the projections, the location of component was gotten by the sliding location window algorithm, then, the defects such as missing component, wrong component, shift and rotation were detected. In the second stage, the three color features were extracted from the component body and the Bayes classifier was used to inspect another wrong component class. The proposed inspection system have been implemented and tested with various types of components collected from production line. The experiment results have verified the validity of this scheme in terns of recognition rate and speed.
Surface mounted components electrodes color features integral projection Bayes classifier
Hui-Hui Wu Xian-Min Zhang Shi-Liang Hong
School of Mechanical and Automotive Engineering of South China University of Technology,Guangzhou,China
国际会议
2009 IEEE International Conference on Information and Automation(2009年 IEEE信息与自动化国际学术会议)
珠海、澳门
英文
571-576
2009-06-22（万方平台首次上网日期，不代表论文的发表时间）