关键词: 机器视觉, 缺陷检测, 矢量导向线, 线性轮廓, 激光刻写

Abstract: To meet the defects detection demand of laser writing parts for machine vision under complex background conditions,a method of tool path contour quality detection based on guide lines was proposed.The guide lines were generated from the vector file,which were distinguished from the area.The matching operation was performed on the measurement-needed image with the generated guide lines,and  the sampling points was generated along the guide lines.A detection operation was performed on the width of contour,connectivity and burr information of the filtered image.Different from the traditional difference detection method performed on gray value or contour,the suggested method treated the guide line as the path,and performed detection operation on the local image of sampling points using detection template.The experimental results revealed that the suggested method both had a good robustness under the complex background condition,and could ensure high detection accuracy and good real-time performance and meet the quality inspecting requirements in the process of laser parts writing.

Key words: machine vision, defect detection, vector guide line, linear contour, laser writing