A Convenient and High-Accuracy Multi-Camera Calibration Method Based on Imperfect Spherical Objects | |
Tao LM(陶黎明)1,2,3; Xia RB(夏仁波)2,3; Zhao JB(赵吉宾)2,3; Zhang T(张涛)1,2,3; Chen YL(陈月玲)2,3; Fu SP(付生鹏)2,3 | |
刊名 | IEEE Transactions on Instrumentation and Measurement |
2021 | |
卷号 | 70页码:1-15 |
关键词 | 3-D calibration object bundle adjustment machine vision multicamera calibration |
ISSN号 | 0018-9456 |
产权排序 | 1 |
英文摘要 | Multi-camera systems have important applications in industrial online measurement, attracting wide interest due to their encouraging performance. However, how to develop a convenient and high-accuracy multi-camera calibration model is a big challenge. Traditional calibration methods based on 2D object require the preparation of high-precision and large-scale calibration object, and have poor adaptability to the spatial distribution of cameras. To address these issues, a convenient and accurate multi-camera calibration method is proposed based on imperfect spherical object. Specifically, a special calibration object, i.e., an imperfect sphere with many coded targets is designed for calibrating the multi-camera system, where the optical axes of the cameras are different in orientations and converge into the measurement field. Then, a Euclidean reconstruction method is employed to calculate the camera poses and the spatial coordinates of feature points in the local coordinate system after adaptive grouping of cameras are completed. Moreover, a graph theory based optimal path transformation (OPT) algorithm is developed to obtain the camera poses and spatial point coordinates in the global coordinate system (GCS), and a spherical projection optimization (SPO) algorithm is designed to spheroidize the spatial coordinates of feature points. At the end, the camera poses and the spatial coordinates of feature points in the GCS are optimized by bundle adjustment algorithm. We build a multi-camera system and conduct extensive experiments to demonstrate the superiority of the proposed method. |
资助项目 | National Nature Science Foundation of China[52075532] ; National Nature Science Foundation of China[91948203] ; National Nature Science Foundation of China[51805527] |
WOS关键词 | MULTI-CAMERA CALIBRATION |
WOS研究方向 | Engineering ; Instruments & Instrumentation |
语种 | 英语 |
WOS记录号 | WOS:000706955100007 |
资助机构 | National Nature Science Foundation of China under Grant 52075532, Grant 91948203, and Grant 51805527 |
内容类型 | 期刊论文 |
源URL | [http://ir.sia.cn/handle/173321/29672] |
专题 | 工艺装备与智能机器人研究室 |
通讯作者 | Zhao JB(赵吉宾); Zhang T(张涛) |
作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China 2.Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang, 110016, China 3.State Key Laboratory of Robotics, Shenyang Institute of Automation, Shenyang, 110016, China |
推荐引用方式 GB/T 7714 | Tao LM,Xia RB,Zhao JB,et al. A Convenient and High-Accuracy Multi-Camera Calibration Method Based on Imperfect Spherical Objects[J]. IEEE Transactions on Instrumentation and Measurement,2021,70:1-15. |
APA | Tao LM,Xia RB,Zhao JB,Zhang T,Chen YL,&Fu SP.(2021).A Convenient and High-Accuracy Multi-Camera Calibration Method Based on Imperfect Spherical Objects.IEEE Transactions on Instrumentation and Measurement,70,1-15. |
MLA | Tao LM,et al."A Convenient and High-Accuracy Multi-Camera Calibration Method Based on Imperfect Spherical Objects".IEEE Transactions on Instrumentation and Measurement 70(2021):1-15. |
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