Illumination-invariant phase-shifting algorithm for three-dimensional profilometry of a moving object

Fuqin Deng; Chang Liu; Wuifung Sze; Jiangwen Deng; Kenneth S. M. Fung; Winghong Leung; Edmund Y. Lam

doi:10.1117/1.OE.51.9.097001

13 September 2012 Illumination-invariant phase-shifting algorithm for three-dimensional profilometry of a moving object

Fuqin Deng, Chang Liu, Wuifung Sze, Jiangwen Deng, Kenneth S. M. Fung, Winghong Leung, Edmund Y. Lam

Author Affiliations +

Optical Engineering, Vol. 51, Issue 9, 097001 (September 2012). https://doi.org/10.1117/1.OE.51.9.097001

Abstract

Uneven illumination is a common problem in practical optical systems designed for machine vision applications, and it leads to significant errors when phase-shifting algorithms (PSA) are used to reconstruct the surface of a moving object. We propose an illumination-reflectivity-focus model to characterize this uneven illumination effect on phase-measuring profilometry. With this model, we separate the illumination factor effectively and consider the phase reconstruction from an optimization perspective. Furthermore, we formulate an illumination-invariant phase-shifting algorithm (II-PSA) to reconstruct the surface of a moving object under an uneven illumination environment. Experimental results show that it can improve the reconstruction quality both visually and numerically.

Citation Download Citation

Fuqin Deng, Chang Liu, Wuifung Sze, Jiangwen Deng, Kenneth S. M. Fung, Winghong Leung, and Edmund Y. Lam "Illumination-invariant phase-shifting algorithm for three-dimensional profilometry of a moving object," Optical Engineering 51(9), 097001 (13 September 2012). https://doi.org/10.1117/1.OE.51.9.097001

Published: 13 September 2012

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