Complete calibration of a structure-uniform stereovision sensor with free-position planar pattern
Complete calibration of a structure-uniform stereovision sensor with free-position planar pattern
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DOI：
10.1016/j.sna.2006.07.004
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发表时间：
2007-03
影响因子：
4.6
通讯作者：
Tao Xue;Bin-ping Wu;Jigui Zhu;S. Ye
中科院分区：
文献类型：
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作者：
Tao Xue;Bin-ping Wu;Jigui Zhu;S. Ye
提出了一种结构均匀的立体视觉传感器，用于可变的三维检测任务。本文建立了立体视觉传感器的数学模型。提出了一种灵活的平面自由位置立体视觉传感器基元参数估计方法。该方法不受平面参考物移动的限制，可以很容易地标定出包含透镜径向和切向畸变系数的所有摄像机参数，并基于立体视觉传感器的三维测量模型，同时利用特征点约束算法对传感器参数进行优化。该方法大大降低了标定设备的成本，对于视觉测量具有灵活性和实用性。实验表明，该方法具有较高的精度，空间长度测量的相对误差优于0.3%。
We present a novel structure-uniform stereovision sensor for variable 3D inspection tasks. In this paper, the mathematical model of the stereovision sensor is established. A flexible approach to estimate all the primitive parameters of the stereovision sensor with free-position planar pattern is proposed. In this technique, without restriction to the moving of the planar reference object, all the camera parameters with coefficient of lens radial and tangential distortion can be readily calibrated, and based on the 3D measurement model of stereovision sensor, the sensor parameters can be optimized with the feature points constraint algorithm simultaneously. The proposed approach greatly reduces the cost of the calibration equipment, and it is flexible and practical for the vision measurement. It shows that this method has high precision by experiment, and the measured relative error of space length excels 0.3%.