Research of Image Measuring Instrument Automatic Tracing-edge Technology Based on Computer Vision
Shaojun Liu · Modular Machine Tool & Automatic Manufacturing Technique · 2013
One of the applications of image measurement instrument is to measure the parts which are processed by computer numerical control(CNC) machine and make sure the accuracy of the process.To meet the fast and accurate requirement of image measurement in the automatic tracing-edge system of image measurement instrument,the path extraction and tracking algorithm of tracing-edge were improved as followed.The cross-search method and the tangential tracking method were improved to extract and track the edge path,according to the different intersections of the edge line and image window.The image processing software of the whole system was developed with Opencv and C language in the ubuntu 10.04 system. The comparison shows that this automatic tracing-edge algorithm has higher tracing-edge efficiency and more accurate edge extraction,and can provide more accurate data for the processing of CNC machine.