摘要
圆形目标在增强现实、摄影测量和结构光投影测量系统等视觉测量领域应用广泛。然而,透视投影引起的圆形目标偏心误差严重影响测量精度。为了提高投影中心定位精度,提出了一种以同心圆为目标的精确投影中心定位方法。研究主要包括改进的投影中心定位方法以及考虑镜头畸变的迭代补偿。使用交比不变性避免了圆形目标因透视投影带来的偏心误差,随后将改进的投影中心坐标加入迭代求取相机参数的过程,消除镜头畸变对中心定位的影响,从而精确定位投影中心。实验结果表明,所提方法能够准确定位投影中心并且在相机标定中也具有良好表现。
Circular targets are widely used in visual measurement fields such as augmented reality,photogrammetry,and structured light projection measurement systems.However,the eccentricity error of circular targets caused by perspective projection seriously affects the measurement accuracy.In order to improve the accuracy of projection center positioning,an accurate projection center positioning method with concentric circles as the target was proposed.This study mainly includes an improved projection center positioning method and iterative compensation considering lens distortion.The use of ratio invariance avoids the eccentricity error caused by perspective projection of circular targets,and then the improved projection center coordinates are added to the iterative calibration process to eliminate the influence of lens distortion on center positioning,so as to accurately locate the projection center.Experimental results show that the proposed method can accurately locate the projection center and has good performance in camera calibration.
作者
李百峰
杨建柏
LI Baifeng;YANG Jianbai(College of Computer Science and Information Engineering,Harbin Normal University,Harbin 150025,China)
出处
《光学技术》
北大核心
2025年第3期330-338,共9页
Optical Technique
基金
黑龙江省省属高等学校基本科研业务费科研项目(2021-KYYWF-0180)。
关键词
偏心误差
交比不变性
相机标定
视觉测量
eccentricity error
cross-ratio invariance
camera calibration
visual measurement
作者简介
李百峰(2001-),男,硕士研究生,从事机器视觉研究。13895856265@163.com;通讯作者:杨建柏(1986-),男,讲师,博士,从事机器视觉,人工智能研究。yangjianbai@hrbnu.edu.cn。
