计算机工程2017，Vol.43Issue(10)：186-191,197,7.DOI:10.3969/j.issn.1000-3428.2017.10.031
白车身孔槽类特征三维坐标在线测量方法研究
Study of On-line Measurement Method for 3D Coordinates of Body-in-White Hole Slot Features
胡彦强 1马钺 2许敏1
作者信息
- 1. 中国科学院沈阳自动化研究所,沈阳110016
- 2. 中国科学院大学,北京100049
- 折叠
摘要
Abstract
In order to realize the visual measurement for the 3D coordinates of body-in-white hole slot feature,based on the principle of binocular stereo vision measurement,the laser is used as the auxiliary equipment to scan the tested hole slot,to complete 3D measurement.Aiming at the space location problem of round hole,compound hole edge and hole core coordinate,an on-line measurement method is proposed.Canny edge detection and Ramer algorithm are used to segment the circular arcs for completing the rough positioning of hole edges.The precise localization of the sub-pixel edge point coordinates is realized by combining the Bazen algorithm and the orthogonal polynomial fitting method.And the ellipse parameter equation is obtained by weight fitting.During online extraction of laser stripe centerline,combining the extremum method,threshold method and gravity method,the intersection points of the fitted ellipse and the center line of light are used as the matching points of binocular stereo vision,and then the 3D coordinates of space points are measured.Experimental results show that the proposed method is of strong robustness,and the comprehensive positioning accuracy of the round hole type is high.关键词
白车身/被测孔槽/双目立体视觉/线激光光纹/亚像素边缘Key words
body-in-white/tested hole slot/binocular stereo vision/line laser stripe/sub-pixel edge分类
信息技术与安全科学引用本文复制引用
胡彦强,马钺,许敏..白车身孔槽类特征三维坐标在线测量方法研究[J].计算机工程,2017,43(10):186-191,197,7.
