Influence of projector pixel arrangement on 3D measurement error under different defocusing degree

Xiaosong Zhang; Jiandong Zhan; Liangbo He; Tongzan Liu; Shutian Xu; Yong Li

doi:10.1117/12.2666809

27 January 2023 Influence of projector pixel arrangement on 3D measurement error under different defocusing degree

Xiaosong Zhang, Jiandong Zhan, Liangbo He, Tongzan Liu, Shutian Xu, Yong Li

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 1255022 (2023) https://doi.org/10.1117/12.2666809
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

In the fringe projection 3D measurement system in which the camera pixel size is much smaller than the projector pixel size, the pixel arrangement of projector will have a significant impact on the measurement results. The main reason for this problem is that the sinusoidal property of the fringes captured by the camera deteriorates. This can be improved by defocusing the projector. In this paper, the influence of projector pixel arrangement on 3D measurement error under different defocusing degree is studied by experiments. According to the actual pixel structure of DMD projector, sinusoidal fringes with zigzag and linear pixel arrangement are designed for experiments. The fringes with a period of 8 pixels are adopted for experiment, and the phase of the fringe is calculated by four-step phase-shifting algorithm. Experimental results demonstrated that the measurement error is a tendency which increases first and then decreases with increasing projector defocusing degree. When the degree of defocus is small, the phase measurement error of linear pixel array is significantly smaller than that of zigzag array. And when the degree of projector defocus increases to a certain extent, the phase measurement error of zigzag pixel array is smaller than that of linear pixel array. The experimental results are valuable for the design of high-resolution 3D measurement system.

Citation Download Citation

Xiaosong Zhang, Jiandong Zhan, Liangbo He, Tongzan Liu, Shutian Xu, and Yong Li "Influence of projector pixel arrangement on 3D measurement error under different defocusing degree", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 1255022 (27 January 2023); https://doi.org/10.1117/12.2666809

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Projection systems

3D metrology

Phase measurement

Cameras

Digital micromirror devices

Phase shifts

Fringe analysis

Show All Keywords

Keywords/Phrases

Search In:

Publication Years