A calibration method based on multi-linear structured light

A calibration method based on multi-linear structured light
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一种基于多线性结构光的标定方法

DOI:
10.1016/j.proeng.2010.11.055
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发表时间:
2010
期刊:
Procedia Engineering
影响因子:
--
通讯作者:
Xiaopeng Ji
Xiaopeng Ji
中科院分区:
其他
文献类型:
--
作者:
Zhiqiang Wei;Jiangtao Li;Xiaopeng Ji

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参考文献

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建立了由摄像机和多线结构光传感器组成的视觉系统的数学模型。在该模型中,提出了一种新的标定方法,利用共面参考靶对多线结构光进行标定。为了标定所有的结构光平面,首先要根据共面参考靶上不同位置的点标定这两个结构光平面。该模型将摄像机坐标视为一个全局世界坐标,并将所有局部世界坐标变换到摄像机坐标上,使得所有点都可以在摄像机坐标下重建。这样,当摄像机和光传感器固定在一起作为视觉系统时,整个系统可以自由且容易地移动,这在工程应用中是有用的。此外,提出了一种新的交比计算算法,有效地减少了计算量,提高了计算精度。与同类技术相比,该模型降低了标定设备的成本,简化了标定过程,提高了计算精度。实验结果表明了该方法的方便性和有效性。
The mathematical model is established for a vision system including a camera and a multi-linear structured light sensor. In the model, a novel calibration method is proposed to calibrate multi-linear structured light using a coplanar reference target. In order to calibrate all structured light planes, firstly the two of those should be calibrated according to points on the coplanar reference target in different positions. In the model, the camera coordinate is considered as a global world coordinate, and all local world coordinates are transformed to the camera coordinate, so that all points can be reconstructed in the camera coordinate. In this way, when a camera and a light sensor are fixed together as a vision system, the whole system can be moved freely and easily, which is useful in engineering applications. In addition, a new algorithm to calculate cross ratio is presented, which decreases amount of calculation and improves the calculation precision effectively. Compared to similar technologies, the model decreases the cost of calibration equipment, simplifies the calibration procedure and improves the calculation precision. Experimental results show its convenience and effectiveness.
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