基于共面点的多视觉测量系统的全局标定方法

本文提出了一种基于共面点的世界坐标唯一全局标定方法，利用激光跟踪仪在现场构建系统总体坐标系，通过拟合基准面来设置共面标定点，系统中各摄像机传感器直接获得标定点的图像，从而实现了各局部相机的全局标定，不需要中间坐标系的转换，避免了多次坐标转换带来的精度损失，标定过程简单。通过在实际的由多个高速视觉传感器组成的飞行器外部姿态测量系统中进行标定实验，在测量范围较大的情况下，系统精度的均方根误差不超过0.8mm。关键词：全局标定 视觉测量 激光跟踪仪 共面点

A global calibration method for multi-vision measurement system with coplanar targets

A unique world coordinates based global calibration method with coplanar targets is proposed, in which laser tracker is taken to establish the general measurement coordinate frame and fitting the standard plane to set up calibrations points, the system is used to directly sample calibrations points for each camera in the multi-vision inspections system, the whole cameras in the measurement system can finish global calibration without medi-coordinate-frames. The accuracy loss from transformation times of coordinates frame decreases and calibrations process is facilitated. Finally, the global calibration experiment on a real aircraft attitude measurement system that is made by high speed multi-cameras is conducted, under conditions of large measurement range, root mean square error of the system is not more than 0.8mm.