3D-profilometry of moving objects with abrupt surface discontinuities by projection of two-frequency color-coded fringe patterns

Jorge L. Flores; Oscar E. Castillo; J. Julia R. Alonso; Ariel Fernández; Yanely B. Machuca

doi:10.1117/12.2595166

1 August 2021 3D-profilometry of moving objects with abrupt surface discontinuities by projection of two-frequency color-coded fringe patterns

Jorge L. Flores, Oscar E. Castillo, J. Julia R. Alonso, Ariel Fernández, Yanely B. Machuca

Author Affiliations +

Proceedings Volume 11830, Infrared Remote Sensing and Instrumentation XXIX; 118300Q (2021) https://doi.org/10.1117/12.2595166
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

3D-profilometry of discontinuous solids by fringe projection is a difficult task due to the problem posed by the phase (profile) unwrapping at sharp borders. To solve this problem, Servin et al. proposed the so-called two-steps temporal unwrapping, in which two consecutive sequences of fringe patterns with different spatial frequencies (a low- and a high-frequency patterns sequence) are projected over a static test surface. As the 3D surface profile is retrieved by phase-shifting techniques, each fringe sequence must have at least three phase–shifted frames, which in principle would preclude the use of temporal unwrapping for measuring moving objects since at least it would be necessary to acquire a total of twelve frames (six frames for the test object plus six more for a reference plane). In the present work we present an improvement to this method, which requires the acquisition of only two color-coded fringe patterns (i.e., two RGBimages) for reconstructing the discontinuous 3D surface of a moving object. The proposed approach is based on the projection of fringes with two different frequencies. Validation experiments are presented.

Conference Presentation

Citation Download Citation

Jorge L. Flores, Oscar E. Castillo, J. Julia R. Alonso, Ariel Fernández, and Yanely B. Machuca "3D-profilometry of moving objects with abrupt surface discontinuities by projection of two-frequency color-coded fringe patterns", Proc. SPIE 11830, Infrared Remote Sensing and Instrumentation XXIX, 118300Q (1 August 2021); https://doi.org/10.1117/12.2595166

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