基于相位测量的摄像机标定方法

New camera calibration technique based on phase measurement

提出一种新的摄像机标定方法,该方法基于2D共面参照物摄像机标定方法和相移技术。首先由摄像机记录已知相位分布的平面,通过相移计算出相位分布。对任意标定平面,两个正交相位分布与平面坐标的对应关系已知,由此可以建立像素坐标与2D平面坐标的一一对应关系。将该已知相位分布的平面在空间中放置不同的位置,分别完成上述测量,即可根据2D共面参照物摄像机标定方法完成摄像机的高精度标定。该方法避开了复杂的标定特征点提取,大大增加了2D标定数据量,提高了标定精度。实验和计算机模拟表明,该方法简单、可靠和精度高。

A novel calibration technique is proposed based on plane camera calibration technique and phase-shift technique. The local world coordinates of the reference planes are decided by the previously known phase distributions on the planes. So the relationships between the 2D image coordinates and the 2D reference coordinates can be set up, and the calibration procedure will be done by 2D plane-based calibration technique after measuring the phase distributions of the reference plane at several different orientations. It avoids the complex procedure of extracting the control points from images, produces mass-volume calibration data, and leads to the high-accuracy calibration results even with the least orientations. Both computer simulation and real data show that the proposed technique is simple, reliable and highly accurate.