Method Research on Automatic Reading of Pointer Instrument Based on Machine Vision
In order to read pointer instruments accurately and automatically,a machine vision based automatic reading method for pointer instruments was proposed.In response to the possible issues of partially invisible scales and non-equal intervals in the unfolded image,an interpolation method for missing scale lines and a pointer reading calculation model for non-equal intervals were constructed.The interpolation model utilized the statistical information of scale spacing to achieve automatic interpolation of positions.The pointer reading calculation model utilized a quadratic spline function to improve the calculation accuracy.The ex-perimental results show that this method can effectively reduce reading errors and better meet the automatic reading requirements of pointer instruments.