CAJ | 학술논문

为了降低标定多次坐标变换而造成的误差，针对圆点标定板的特性，提出了一种基于圆点内具有数字标记的全局标定方法。其关键步骤包括：首先在标定板的某些圆内用数字做标记，并记下带有标记的圆点的物理坐标，然后通过模板匹配的方法快速找到标记有特殊数字的圆点，通过2D仿射变换将图像坐标转换成工作台物理坐标，计算出外部参数。实验结果表明，该方法操作简便，标定残差的平均误差在2μm以下，能够满足实际标定应用要求。
위료강저표정다차좌표변환이조성적오차，침대원점표정판적특성，제출료일충기우원점내구유수자표기적전국표정방법。기관건보취포괄：수선재표정판적모사원내용수자주표기，병기하대유표기적원점적물리좌표，연후통과모판필배적방법쾌속조도표기유특수수자적원점，통과2D방사변환장도상좌표전환성공작태물리좌표，계산출외부삼수。실험결과표명，해방법조작간편，표정잔차적평균오차재2μm이하，능구만족실제표정응용요구。
In order to reduce error caused by multiple calibrations, in light of the characteristics of the dot calibration board, this paper proposes a global calibration method based in dots with a digital signature. The key steps include: first mark with numerals in some circles on the calibration board, and take down the physical coordinates of the marked dot, then quickly locate the dots with special figures by adopting the template matching method, and finally transform the image coordinates into physical coordinates of the workbench through a 2D affine transformation and get the external parameters by calculation. Experimental results show that the method is easy to operate; the average calibration error of is under2μmand can meet the actual calibration application requirements.