指针表刻度中心直线拟合方法研究  

Research on fitting method of pointer meters scales center straight-line

作　　者：李学聪[1] 汪仁煌[1] 刘洪江[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《计算机工程与设计》2012年第7期2726-2729,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(11072063)

摘　　要：重点研究直线图像的直线方程拟合方法,提出了一种基于最小距离直线拟合新方法,用于拟合指针表刻度直线。对采集的仪表图像做预处理后,获得仪表各刻度直线的二值图像。使用最小距离直线拟合方法拟合各刻度中心直线,使用刻度拟合直线相交点对拟合直线进行最小二乘修正,提高刻度中心直线的拟合精度。仿真结果表明,该直线拟合方法能快速确定高精度指针表刻度线图像的精确直线方程,有利于提高指针表读数的精度。The straight-line equation fitting method of the straight-line image is researched in detail, and a straight-line fitting method is proposed based on the least distance for fitting pointer meters scales center straight-line. After pre-processing of poin- ter meters image, the meter scale linear binary image is obtained. Firstly, the least distance straight-line fitting method is used to fitting each scale center straight-line, then the crosspoints of the scale fitting straight-line is used to fix the fitting line on the least-square correction, and the scale center straight-line fitting precision is improved. Simulation results show that the linear fit- ting method can rapidly determine the precise equation of the scale center straight-line of the high-precisio~ pointer meters and improve effectively the accuracy of meter readout.

关 键 词：指针表 高精度 特征点 直线拟合 最小距离法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]