基于像素比例法和GA-BP的单相电表读数识别  

Recognition of numeric characters on single-phase ammeter dial plate based on GA-BP and pixel-scale algorithms

作　　者：冯冬青[1] 付巍[1] 石成辉[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450001

出　　处：《计算机工程与设计》2009年第14期3458-3461,3465,共5页Computer Engineering and Design

基　　金：河南省自然科学基金项目(0511010800)

摘　　要：对单相电表表盘读数的显示特点进行了研究,针对在电表表盘末位刻度识别中存在识别困难,识别率低的情况,提出了像素比例法这一精确识别方法。对初始图像采用大津二值化法,中值滤波法进行预处理,用投影法分别对字段及单个字符进行分割。采用GA-BP算法识别表盘读数。在样本集下单整字识别率为99.2%,非整字识别率为97.7%。实验结果表明,该方法对刻度有较高的识别精度。The feature is researched, which numeric characters display on single-phase ammeter dial plate. Against the scale which is on the bottom of the ammeter dial plate is difficult to be recognized, and its recognition rate is very low, an algorithm based on Pixelscale method is put forward. Otsu binary transform algorithm and mid-value filter method are used to preprocess the original image. Projection algorithm is used to field a single character and the segmentation. GA-BP algorithm is introduced into precise automatic recognition of numeric characters on single-phase ammeter dial plate. The whole-word recognition rate reaches 99.2%, non-whole word recognition rate reaches 97.7%. Experiments show that the algorithm has more high precision.

关 键 词：单相电度表 GA-BP算法 像素比例 数字识别 表盘 图像处理 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]