一种基于改进角度法的指针式仪表图像自动读数方法

摘要

利用计算机进行指针式仪表的检定技术日趋成熟，其中仪表数值的判读算法还有一定缺陷，对读数精度造成影响。针对基于机器视觉的指针式仪表检定对高精度的要求，着重研究了计算机自动读数过程中的读数算法环节，提出了基于角度法和距离法的改进角度法，该方法结合了角度法和距离法的优点，进一步提高了基于机器视觉的指针式仪表自动读数的精度。%The verification technology of pointer instruments, which uses computers, has become ripe. The interpretation arithmetic of instruments still has some drawbacks, which causes bad effects to the accuracy. This paper focused on the demand for the high accuracy of pointer instrument′s verification based on computer vision. It studies the reading arithmetic of automatic reding, and puts forwards the improved angle method which is based on the angle method and distance method. The improved angel method includes the advantages of angle method and distance method, which improve the accuracy of pointer instrument′s automatic reading based on computer vision.