高精度指针仪表自动读数识别方法  

Highly accurate automatic dial recognition

作　　者：何智杰[1] 张彬[1] 金连文[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《计算机辅助工程》2006年第3期9-12,18,共5页Computer Aided Engineering

基　　金：国家自然科学基金(60275005);广东省自然科学基金(04105938)

摘　　要：实现一个高精度指针仪表读数自动识别系统.用数码摄像头采集仪表的图像,然后利用数字图像处理技术识别刻度和指针,根据指针和刻度的相对位置计算指针读数值.使用条件霍夫变换(ConstrainedHOUGHTransfer)和中心投影分析法实现刻度的全自动识别,采用快速中心投影法进行指针检测与识别,识别速度达到68ms.实验结果表明该方法比传统方法速度快、精度高,系统读数平均误差仅为0.016%.A highly accurate dial recognition system is implemented, which gets the dial image through digital camera, recognizes the scales and pointers by image processing technique, and calculates the reading value according to the relative position of the pointers and scales. The constrained HOUGH transfer method combined with the mid-projection method is used to achieve a fully automatic scale recognition process, and the fast mid-projection method is also used to recognize the pointers, which decreases the pointer recognition time to 68 ms. The experimental result demonstrates that the methods are much faster and more accurate than the traditional methods, and the mean error of reading value is only 0. 016%.

关 键 词：计算机视觉 仪表识别 条件霍夫变换 快速中心投影 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]