光学运动捕捉实验中参考相机的选择方法研究  

Study on the Method of Reference Camera Selection in the Optical Motion Capture Experiment

作　　者：杜海[1] 孟娟 熊伟 崔丽飞 DU Hai;MENG Juan;XIONG Wei;CUI Lifei(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;School of Information Engineering,Dalian Ocean University,Dalian 116023,China;LUSTER LightTech Co.,Ltd.,Beijing 100094,China;College of Electronics and Communications,Shijiazhuang Vocational College of Technology&Information,Shijiazhuang 050500,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116024 [2]大连海洋大学信息工程学院,大连116023 [3]凌云光技术股份有限公司,北京100094 [4]石家庄科技信息职业学院电子与通信学院,石家庄050500

出　　处：《实验科学与技术》2024年第5期7-13,共7页Experiment Science and Technology

基　　金：大连理工大学基本科研业务项目(DUT21LAB117)。

摘　　要：针对运动捕捉实验过程中多目视觉系统的标定优化问题,通过对摄像机参数估计过程的误差分析,探索了参考相机的选择对于光束平差迭代计算的影响,并在此基础上提出了一种Q值评测方法,该方法运用有权无向图获得相机节点之间的最短连通路径,利用反投影误差和均方差的加权平均值来评估参考相机选择的合理性。在实验中,使用了多台摄像机组成多目视觉系统对所提出的参考相机选择方法进行了验证。实验结果表明,所提出的Q值评测方法是有效的,可进一步提高系统标定的精度,对运动测试实验精度控制具有重要的参考价值。Aiming at the calibration optimization problem of the multi-vision system in the process of motion capture experiment,this paper explores the influence of the selection of reference camera on the iterative calculation of bundle adjustment through the error analysis of camera parameter estimation process,and proposes a Q parameter evaluation method based on it,which uses the entitled undirected graph to obtain the shortest connected path between camera nodes.The back projection error and the weighted mean of mean square error are used to evaluate the rationality of the reference camera selection.In the experiment,multiple cameras have been used to form a multi-view stereo vision system to verify the reference camera selection method proposed in this paper.The experimental results show that the selection of reference camera is necessary and the Q parameter evaluation method designed is effective,which can further improve the accuracy of the system calibration and has important reference value for the application of optical motion measurement.

关 键 词：运动捕捉 多目视觉系统 无向图 摄像机标定 光束平差 

分 类 号：O353.5[理学—流体力学]