Online visual inspection method for O-ring number on the pipe connectors
管接头上密封圈数量在线视觉检测方法

In the visual inspection application for the O-ring number on the chrome-plated pipe connectors,the orientations of the pipe connectors are unfixed,and there are often shadows and hotspots in the image.To prove the stability of the image processing results,the basic image processing procedures of thresholding,thinning and size filtering were adopted.Moreover,the threshold value was calculated by using P-tile method,the lines with branches or with large curvatures in the thinned image were broken by using ne...