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基于姿态筛选的单目结构光标定方法

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由相机、投影仪组成的单目结构光系统在三维测量领域中具有重要应用,系统标定是确保三维测量精度的关键步骤,传统标定算法在采集图像的过程中并未考虑靶标姿态对系统标定精度的影响.针对平面靶标的单目结构光系统标定问题,提出标定姿态选择需要规避的2种情况:1)靶标平面与相机的成像平面或投影仪的投影平面平行的姿态;2)只平移或在靶标平面内旋转的姿态.基于此,提出一种靶标姿态筛选准则,并对每个姿态靶标图像旋转向量夹角设定阈值,过滤掉影响标定精度的图像,保留有利姿态靶标图像.实验结果表明,对靶标姿态筛选有利于保证系统测量精度,标定精度高,能够满足当下工业生产加工精度的要求.
Pose-based monocular structured light calibration method
;The monocular structured light system composed of camera and projector plays a crucial role in the field of three-di-mensional measurement.System calibration is a pivotal step in ensuring the accuracy of three-dimensional measurements.Tradi-tional calibration algorithms,during the image acquisition process,have not considered the impact of different poses on the preci-sion of system calibration.Addressing the calibration issue of a monocular structured light system with a planar target,two situa-tions that should be avoided during calibration pose selection were proposed.Firstly,poses where the target plane is parallel to the imaging plane of the camera or the projection plane of the projector;secondly,poses involving only translation or rotation within the plane of the target.Building upon this,a criterion for target image selection was proposed,incorporating a threshold for the Eul-er angles of the target images.This criterion filters out images that negatively impact calibration precision,retaining those with ad-vantageous target poses.Experimental results demonstrate that the selection of target image filtering contributes to ensuring system measurement accuracy,achieving high calibration precision,and meeting the accuracy requirements of contemporary industrial production and processing.

structured light measurementsystem calibrationscreening criteriacalibration accuracy

范鹏翔、陈天飞、孙丽君、丁高见、薛晓梅

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河南工业大学粮食信息处理与控制教育部重点实验室,郑州 450001

河南工业大学郑州市机器感知与智能系统重点实验室,郑州 450001

河南工业大学信息科学与工程学院,郑州 450001

结构光测量 系统标定 筛选准则 标定精度

国家自然科学基金项目国家自然科学基金项目

6217312761973104

2024

现代制造工程
北京机械工程学会 北京市机械工业局技术开发研究所

现代制造工程

CSTPCD北大核心
影响因子:0.374
ISSN:1671-3133
年,卷(期):2024.(10)
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