变电站室内数显仪表的读数识别

Reading identification of indoor digital instrumentation in substation

该文在MATLAB编程环境下,针对变电站内数显仪表的特点,提出一种基于模板匹配的数显仪表读数识别方法。该方法首先建立数字0~9的模板库;然后在对原始仪表图像进行一定图像预处理的基础上,采用最大类间方差法(OTSU)分割出目标数字区域,并按照模板对数字矩阵进行统一化处理。由于数显仪表的读数都是七段式数码管,数字类型统一,通过充分运用模版匹配可将数显仪表的读数识别出来。该方法易于实现,识别率高,对数显仪表识别具有一定的指导意义。

In this paper,a method of digital meter reading recognition was proposed in MATLAB programming environment,which was based on template matching and was aimed at the characteristics of substation indoor environment. It used OTSU threshold segmentation algorithm to locate the digital region on the dashboard,and then used the method of template matching to compare the digital region with the seven-segment digital template,so as to determine the value of digital region. This method is simple and can effectively identify the number.