电测与仪表2018，Vol.55Issue(6)：116-121,6.
基于空间变换的指针式仪表读数识别算法研究
The algorithm for the recognition of pointer type meter based on space transformation
摘要
Abstract
At present,the auto reading recognition algorithms for pointer type meter are vulnerable to illumination,and the recognition accuracy for the meter with damping liquid is not high.In this paper,a new algorithm for the recognition of pointer meter based on space transformation is proposed.The proposed approach firstly selects the circle of meter region,and extracts the inner circle contour of the region by edge extraction in order to confirm the parameters of image transform and dials into the circular rectangle;Secondly,the pointer image is obtained by image mosaic processing,on this basis,it redraws the scale lines to get its coordinates;Finally,meter reading is derived by image subtraction to obtain the center line coordinates of the pointer region,and then,the reading recognition is identified by the relation between the pointer and scale lines.Light experimental results show that the identification of the pointer and scale lines are smaller effected by illumination.Calibration instrument results show that the proposed algorithm has better recognition efficiency and accuracy.关键词
指针式仪表/空间变换/边缘提取/距离法Key words
pointer type meter/space transformation/edge extraction/distance method分类
信息技术与安全科学引用本文复制引用
汤亮,何稳,李倩,张董洁,汪威,胡新宇..基于空间变换的指针式仪表读数识别算法研究[J].电测与仪表,2018,55(6):116-121,6.基金项目
湖北省自然科学基金资助项目(2016CFB513 （）
2016CFB653) （）
