Subpixel accuracy for extracting groove center based on corner detection

作     者：刘苏宜 王国荣 石永华 

作者机构：College of Mechanical Engineering South China University of Technology 

出 版 物：《China Welding》 (中国焊接（英文版）)

年 卷 期：2006年第15卷第3期

页      面：59-63页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0811[工学-控制科学与工程] 080201[工学-机械制造及其自动化] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work is financially supported by National Nature Science Foundation of China (Grant No. 50175027). 

主　　题：edge detection LOG operator corner detection subpixel polynomial interpolation 

摘      要：Subpixel accuracy for V-groove center in robot welding is researched and a software measure to increase the accuracy of seam tracking by laser is presented. LOG （ Laplacian of Gaussian ） operator is adopted to detect image edge. Vgroove center is extracted by corner detection of extremum curvature. Subpixel position is obtained by Lagarange polynomial interpolation algorithm. Experiment results show that the method is brief and applied, and is sufficient for the real time of robot welding by laser sensors.