中文摘要：

基于一维标定物相机标定方法的标定精度问题，系统地分析了标定过程中的误差形成因素，提高精度的关键在于对畸变的校正。结合一维标定物的特点，提出用交比不变法对成像畸变进行校正。同时指出了在实际应用中应注意的一些问题，以提高算法的稳定性。实验表明，其标定精度可以达到基于平面标定法的标定精度，从而验证了算法的有效性。

英文摘要：

Based on the accuracy of camera calibration based on one-dimensional objects, the factors contributing to errors in calibration processing are analyzed systematically. The key of improving the accuracy lies in distortion correction. Combined with the characteristics of one-dimensional objects,the cross-ratio constant method is proposed to correct the image distortion. At the same time, the problems need to be paid attention in practice are pointed out, in order to enhance the algorithm stability. Experiments show that the calibration accuracy based on one-dimensional objects can be achieved at the same level of calibration based on plane, thus verifies the effectiveness of the algorithm.