Hybrid calibration method for improving 3D measurement accuracy of structured light systems

Andres G. Marrugo; Raul Vargas; Song Zhang; Lenny A. Romero

doi:10.1117/12.2567650

21 August 2020 Hybrid calibration method for improving 3D measurement accuracy of structured light systems

Andres G. Marrugo, Raul Vargas, Song Zhang, Lenny A. Romero

Proceedings Volume 11490, Interferometry XX; 1149008 (2020) https://doi.org/10.1117/12.2567650
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

In structured-light systems, the lens distortions of the camera and the projector reduce the measurement accuracy when calibrated as a standard stereo-vision system. The conventional compensation via distortion coefficients reduces the error, but still leaves a significant residual. Recently, we proposed a hybrid calibration procedure that leverages the standard calibration approach to improve measurement accuracy. This hybrid procedure consisted of building a pixel-wise phase-to-coordinate mapping based on adjusted 3D data obtained from the standard stereo-vision method. Here, we show experimentally that the measurement accuracy can be significantly improved, even using the linear pinhole model and linear mapping functions. We then move to consider the nonlinear model to improve the measurement accuracy further. Encouraging results show that this new calibration method increases the measurement accuracy without requiring elaborate calibration procedures or sophisticated ancillary equipment.

Conference Presentation

Citation Download Citation

Andres G. Marrugo, Raul Vargas, Song Zhang, and Lenny A. Romero "Hybrid calibration method for improving 3D measurement accuracy of structured light systems", Proc. SPIE 11490, Interferometry XX, 1149008 (21 August 2020); https://doi.org/10.1117/12.2567650

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