基于深度学习YOLOv2算法的钢材压印字符识别研究  

Research on Character Recognition of Steel Embossing Based on YOLOv2

作　　者：黄慧宁 张学军[2] 黄菊 梁婵 孙映华 

机构地区：[1]广西大学计算机与电子信息学院,广西 南宁 [2]广西大学计算机与电子信息学院,广西 南宁 广西多媒体通信与网络技术重点实验室,广西 南宁 [3]广西大白小黑智能机器人有限公司,广西 南宁

出　　处：《计算机科学与应用》2020年第1期126-135,共10页Computer Science and Application

基　　金：广西自然科学基金“形状纹理特征量的提取及其优化研究”(No. 2017JJA170765y);国家自然基金“基于CT数据的胃癌模型的三维重建和手术仿真”(No. 81760324)资助.

摘　　要：针对工业生产钢材部件上压印字符与背景区域同色和光照不均影响,传统计算机视觉算法识别钢印字符存在效率与精度不佳的问题,本研究提出一种基于YOLOv2的钢材压印字符识别方法。通过一些基本的图像预处理方式扩充钢印字符数据集,采用快速可靠的深度学习算法YOLOv2自动提取图像的特征,实现对钢印字符(包括数字和字母)的识别。相较于其他传统的图像识别算法,实验结果表明,该网络模型对钢印字符识别的准确率达98.6%,算法平均处理时间为0.3 s,达到了工程应用的精度和效率要求。此外,利用字符位置信息对模型的输出进行改进,实现直接输出正确的生产标号。在工业生产环境下具有较好的稳定性和实时性,有一定的应用意义。Aiming at the influence of the same color as the background area of industrial parts and uneven illumination of the steel embossing characters, there is a problem of poor efficiency and precision of traditional computer vision algorithms to identify steel embossing characters. This research proposes a steel embossing character recognition method based on YOLOv2. Through some basic image preprocessing methods, the steel embossing character data set is expanded, and the fast and reliable deep learning algorithm YOLOv2 is used to automatically extract the features of the image to realize the recognition of the steel embossing characters (including numbers and letters). Compared with other traditional image recognition algorithms, the experimental results show that the accuracy of the network model for the identification of steel embossing characters is 98.6%, and the average processing time of the algorithm is 0.3 s, which meets the accuracy and efficiency requirements of engineering applications. In addition, the output of the model is improved by using the character position information, and the correct production label can be output directly. It has good stability and real-time performance in industrial production environment and has certain application significance.

关 键 词：深度学习 字符识别 YOLOv2 目标检测 图像处理 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]