Improving the measuring accuracy of structured light measurement system

Qi Xue; Zhao Wang; Junhui Huang; Jianmin Gao

doi:10.1117/1.OE.53.11.112204

31 March 2014 Improving the measuring accuracy of structured light measurement system

Qi Xue, Zhao Wang, Junhui Huang, Jianmin Gao

Author Affiliations +

Optical Engineering, Vol. 53, Issue 11, 112204 (March 2014). https://doi.org/10.1117/1.OE.53.11.112204

Abstract

A method for improving the measuring accuracy of structured light measurement system, which adopts projecting stripe pattern to measure the three-dimensional profile, is presented. Based on the evaluation of the reliability of center extraction results, the improvement of accuracy is achieved by identifying and rejecting the stripe center extraction results with large error. Two parameters are used to evaluate the reliability of center extraction results. The first parameter is the average energy of the stripe, which is used to analyze and establish the relationship between the extraction accuracy and the signal-to-noise ratio through a statistical method. The second parameter is the asymmetric degree of the stripe gray distribution which introduces error into the center extraction, and a new method is proposed for measuring the asymmetric degree. Then, the criteria of the data rejection defined by the thresholds are presented, and large error data with low reliability are identified according to the thresholds. Higher measuring accuracy is achieved by rejecting the identified data. The validity of the method has been proved by experiments.

Citation Download Citation

Qi Xue, Zhao Wang, Junhui Huang, and Jianmin Gao "Improving the measuring accuracy of structured light measurement system," Optical Engineering 53(11), 112204 (31 March 2014). https://doi.org/10.1117/1.OE.53.11.112204

Published: 31 March 2014

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available