基于两组同心圆环点的双目摄像机标定方法研究

Research on binocular camera calibration based on two groups of concentric circle points

在研究传统摄像机标定原理及方法的基础上,提出了一种新的基于同心圆环点模板的双目摄像机标定方法。该方法仅要求摄像机摄取任一方位包含所有25个同心圆环点的所设计模板的一幅图像,即可根据射影几何内秉的约束条件和左右图像的视差完成对双目摄像机焦距、基线距离和光心位置等参数的标定,且不需要进行图像的畸变校正与匹配。实验表明,该双目摄像机的标定方法具有较高的精度和效率,可以方便、迅速地实现双目摄像机的标定。

Studying principles and methods for traditional camera calibration, a new method based on two groups of concentric circle points for binocular camera calibration is proposed. The method just requires a view of a newly designed planar calibration pattern which includes all 25 concentric circle points with a pencil of lines passing through the circles ＇ centers in an arbitrary direction. Then the binocular camera ＇s focal length, baseline distance and optical center position can be calibrated utilizing the inherent constraints of projective geometry and parallax between the left and right images without requirements of distortion correction and matching. Experimental results show that the method performs convenient and rapid binocular camera calibration with high accuracy and efficiency.