中文摘要：

提出一种新的标靶校正方法。首先,用一台数码相机从不同角度拍摄标靶,获取多幅图像。分别提取各图像中标志点的中心作为特征点,根据标靶图案的拓扑关系,建立各幅图像间同名标志点的对应关系,并结合光束平差计算特征点的三维坐标,该特征点的三维坐标由尺度因子所约束。最后,根据任意两个特征点的实际距离来获取尺度因子,并将各特征点的三维坐标缩放至实际尺寸。经实验验证,本方法校正的标靶具有较高的精度,操作简易,成本低,可广泛适用于视觉测量及系统标定。

英文摘要：

A novel method for correcting the 2D calibration target is proposed.Firstly,we captured multiple images of the inaccurate calibration target from multi-views and located the coordinates of those circle landmarks in these images.Secondly,homonymous landmarks in different images could be detected by a scheme for a special topology relation.Thirdly,we could accurately reconstruct the 3D coordinates of landmarks with a scale constraint using bundle adjustment strategy.Finally,the scale was computed from an accurate distance between any two landmarks.Then we could obtain the true coordinates of landmarks,which multiplied by the scale.The experimental results validated that our method has the advantages of high-precision,low-cost and easy-implementation,which can be widely applied in vision measurement and system calibration.