指针式仪表读数识别系统研究  

Research on Reading Recognition System of Index-instrument

作　　者：崔行臣[1] 段会川[1] 

机构地区：[1]山东师范大学信息科学与工程学院,济南250014

出　　处：《信息技术与信息化》2009年第5期63-65,共3页Information Technology and Informatization

摘　　要：介绍了一个指针式仪表自动读数识别系统。首先对仪表图像进行预处理操作;然后利用减影法提取指针图像;最后根据仪表指针变化趋势特点,提出应用于仪表指针读数识别的快速Hough法对指针进行识别,通过限制搜索范围降低Hough计算量。实验结果证明,该方法能在很大程度上提高系统实时性,比传统标准Hough方法时间快2～3倍。A reading recognition system of index - instrument is introduced. Firstly, preprocessing operation on index - instrument is done ; then, the index is extracted with the maximum gradient comparing subtraction method; finally, according to the characteristics of the instrument＇ s index change trends, a fast Hough transformation that is applicable to reading recognition system of index - instrument is proposed to recognize the index and though restricted the area searching to reduce calculating amount. The experimental results show that the method enhances the system＇ s timeliness largely and 2 - 3 times faster than the standard Hough transformation.

关 键 词：图像处理 指针式仪表 读数识别 快速 HOUGH变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]