基于机器视觉的数字显示仪表自动读数  

Number Reading Automatically of Digital Display Instrument based on Machine Vision

作　　者：申中鸿[1] 蒋春旭[1] 徐华伟[1] 李镇康[1] 周茂杨[1] 刘嘉祁[1] 

机构地区：[1]工业和信息化部电子第五研究所,广东广州510610

出　　处：《电子产品可靠性与环境试验》2013年第A01期110-115,共6页Electronic Product Reliability and Environmental Testing

基　　金：国家科技支撑计划课题资助项目(2011BAE01B14);广东省科技计划课题<广东LED室内照明标杆体系研究与实施>资助项目(2011A081304005);国家自然科学基金<半导体照明系统可靠性强化机理与试验方法设计>资助项目(U1201254)

摘　　要：利用机器视觉技术,结合计算几何轨迹识别方法,实现数字显示仪表的自动读数。首先,根据不同色彩空间的表现特征,选择适合处理数字显示仪表的色彩分量;其次,利用阈值二值化及其他图像预处理技术对所采集的数字显示仪表图像进行处理;之后,统计分析每个目标区域的计算几何轨迹特征;最后,将目标区域的计算几何轨迹特征与已有的特征库进行匹配,对目标区域进行分类识别。经过大量的实验验证,该方法具有良好的准确性,可研究推广于实际的数显工业场所。The implementation of automatic reading of the digital display instrument is presented based on machine vision technology, combining with computational geometry trajectory identification methods. First, the appropriate process color components of the digital display meter are selected according to the performance characteristics of different color space. Secondly, the acquired digital display instrument image is processed using threshold binarization and some other image preprocessing techniques. Then, the computational geometry trajectory characteristics of each the target area are analyzed. Finally, the target areas are classified via comparing the computed geometry trajectory features of target areas with the existing feature library. With a lot of experiments, it is shown that the method has good accuracy and could be used on the actual digital display instrument in industrial sites.

关 键 词：机器视觉 计算几何 轨迹识别 数显仪表 自动读数 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]