提出了一种新的摄像机标定方法,用显示器显示不同方位和姿态标定图案,无需实际移动标靶来完成摄像机标定工作。先在显示器上显示一个标准标靶图像,用Tsai单平面摄像机标定方法标定得到摄像机的初始内外参数，再结合手工测量得到的外参中平移向量TT的ZZ向分量(Tz)初值,计算生成一系列不同位姿的虚拟标靶图案,显示在显示器上,替代常规标定方法中的标靶移动,最终采用张正友标定方法从摄像机拍摄到的多位姿平面标靶图案中标定得到最终的摄像机内外参数。实验分析验证了新方法的实用性,结果表明,新方法易操作、不需要实际移动平面标靶,标定精度与基于多位姿平面标靶的张正友方法相当,能为摄像机标定提供新的实现方案。

A novel camera calibration method is proposed in this paper. An immovable LCD screen which displays a serial of patterns of the planar targets with different positions is used to the camera calibration. Firstly, a standard chessboard picture is displayed on the LCD screen. Using Tsai’s planar camera calibration method to get the rough camera parameters, and then with the Z component of the translation vector TT in the extrinsic parameters which is measured by manually, a serial of chessboard images virtually lying in different positions are obtained and displayed on the screen which will be used to calibrate the camera by the classic Zhangs method. Some experiments have been completed to analyze and verify the practicability of this new method. The results show that this new method is easy to operate and its accuracy is same as that of Zhang’s camera calibration method. So, the new method provides a new choice for camera calibration.