A novel accuracy evaluation method for large scale vision measurement

作者：Yang J^*; Lu N; Dong M; Yan B; Wang J

来源：Journal of Optoelectronics and Advanced Materials, 2009, 11(11): 1675-1680.

• Vision
• Large scale measurement on field
• Precision evaluation
• Distance constraint

In order to evaluate the measurement accuracy of large scale vision measurement system and reconcile the measurement results with national standard, the method named "the variance of fitting point" was proposed. Firstly, several line segments of known length with common vertex were placed in the view field and these length values were considered as true values. In vision measurement system coordinate, these line segments could not cross one point because of the error existence. According to the length constraint, a point would be fitted by the least error square algorithm. Finally, the measurement accuracy was denoted by the variance of the fitting point. In the experiment, the lengths of the control target points measured by laser tracker were considered as true value. Meanwhile, the proposed method was compared with the statistical method. Experimental results indicate that the variance of fitting point could reflect the measurement accuracy. The RMS of evaluation variance is (0.0506, 0.0329, 0.0400).

• 出版日期2009-11
• 单位北京邮电大学