Inspection algorithm of arc-parts based on machine vision

Abstract

In order to achieve fast and accurate inspection on the feature parameters of the arc-shaped piece,the paper presented a method that inspected feature parameters of the arc-shaped piece based on machine vision.First,the image edge was extracted by Canny operator and sub-pixel coordinate was computed by a cubic spline interpolation algorithm.Then,discrete curvature was computed by discrete curvature computing method based on tangent direction.The discrete curvature data were arranged;the mean and variance,as well as the arc-length,surface and angle of curved pieces were calculated.The experimental results indicate that the proposed method is of not only high-precision,high-speed but also good-stability,and can satisfy inspection requirement of arc-parts feature parameters.