华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (6): 1-4.

• •    下一篇

基于分形理论的焊缝信息提取

朱若磊 黄石生 张红兵 冯桑   

  1. 华南理工大学 机械工程学院，广东 广州610640
  • 收稿日期:2003-08-26 出版日期:2004-06-20 发布日期:2015-09-09
  • 通信作者: 朱若磊（1973-），男，博士生，主要从事图像处理及自动控制的研究. E-mail:hgzzz1973@163.com
  • 作者简介:朱若磊（1973-），男，博士生，主要从事图像处理及自动控制的研究.

Acquirement of Welding Seam Information Based on Fractal Theory

Zhu Ruolei  Huang Shisheng  Zhang Hongbing  Feng Sang   

  1. College of Mechanical Engineering, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China
  • Received:2003-08-26 Online:2004-06-20 Published:2015-09-09
  • Contact: 朱若磊（1973-），男，博士生，主要从事图像处理及自动控制的研究. E-mail:hgzzz1973@163.com
  • About author:朱若磊（1973-），男，博士生，主要从事图像处理及自动控制的研究.

PDF

162

被引次数

47

摘要： 在基于机器视觉信息的焊缝跟踪系统中,受焊接条件的影响,所拍图像经常存在许多干扰信号,严重地影响了准确焊缝边缘位置信息的获得.针对这一问题,文中利用基于分形理论的边缘提取算法对有干扰图像中的焊缝边缘位置进行了提取.该算法利用各向同性的分数布朗随机场模型对焊缝图像进行分析,通过适当选取无标度区域求出了像素点及其邻域的分数维,并据此来区分焊缝边缘区域.文中还用该算法对自然光及弧光(混合气体保护焊)干扰条件下的焊缝图像进行了处理,结果表明,在较强的干扰条件下,此算法也能够将焊缝边缘位置信息准确提取出来,使焊缝中心位置误差不超过0.3mm.

关键词: 分形理论, 边缘提取, 焊缝跟踪

Abstract:

In the weld seam-tracking system based on machine vision, the welding seam images acquired in the welding process are mixed with strong noises because of the effect of welding conditions. This makes it difficult to get precise seam situation. In this paper, a new edge extraction algorithm based on the fractal theory was introduced to seek welding edge's position in the seam images with noises. In this algorithm, seam images are analyzed depending on the fractional Brownian field model, and the fractal dimension of some pixels and their neighborhood in seam images are calculated by selecting the scaleless range properly, thus distinguishing the seam edge area. The proposed algorithm was then applied to process the images with noises in natural light and arc light (mixed gas shielded welding). The result shows that this algorithm can be used to Correctly extract the position information of welding seam even with strong interference, with the central position error of welding seam less than 0.3mm.

Key words: fractal theory, edge extrection, welding seam-tracking

中图分类号: 

总访问量
今日访问
在线人数
粤ICP备05084312号
版权所有 © 华南理工大学学报编辑部
地址：广州 五山 华南理工大学17号楼 　邮编：510640
电 话：020-87111794　E-mail : journal@scut.edu.cn
  • 微信号：Journalscut
  • QQ群：699235083