"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

A novel accuracy evaluation method for large scale vision measurement

J. YANG1,2,* , N. LU1,2, M. DONG2, B. YAN2, J. WANG2

Affiliation

  1. School of Electronic Engineering Beijing University of Posts and Telecommunications, Beijing 100876, China
  2. School of Photoelectronic information and Communication engineering, Beijing Information Science and Technology University,Beijing100192, China

Abstract

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)..

Keywords

Vision; Large scale measurement on field; Precision evaluation; Distance constraint.

Submitted at: Sept. 24, 2009
Accepted at: Nov. 19, 2009

Citation

J. YANG, N. LU, M. DONG, B. YAN, J. WANG, A novel accuracy evaluation method for large scale vision measurement, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 11, pp. 1675-1680 (2009)