Evaluating and propagating uncertainty in digital fringe projection systems

Gayton, George; Isa, Mohammed; Su, Rong; Leach, Richard

Abstract

Fringe projection is a measurement technique able to produce high-density data measurements of Lambertian surfaces using a camera and projector. Evaluating the uncertainty of a fringe projection system is challenging because of the high-density and the interdependence of data involved in both characterising the instrument parameters and conducting the measurement. Fringe projection systems undergo a characterisation process to define the parameters that triangulate the surface points from camera images. The accuracy of the parameters defined during the characterisation process will partly define the accuracy of the final measurement. The characterisation process is often called “calibration” - yet does not provide a value of uncertainty of the parameter values found during characterisation. This paper outlines a method to allow the evaluation of uncertainty in a fringe projection system caused by imperfect characterisation procedures before applying this method to a flat plane artefact and a sphere plate artefact.

Citation

Gayton, G., Isa, M., Su, R., & Leach, R. (2021, June). Evaluating and propagating uncertainty in digital fringe projection systems. Presented at Optical Measurement Systems for Industrial Inspection XII, Online Only, Germany

• Presentation Conference Type: Edited Proceedings
• Conference Name: Optical Measurement Systems for Industrial Inspection XII
• Start Date: Jun 21, 2021
• End Date: Jun 25, 2021
• Acceptance Date: Jun 20, 2021
• Online Publication Date: Jun 20, 2021
• Publication Date: Jun 20, 2021
• Deposit Date: Aug 18, 2023
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 11782
• Article Number: 117821C
• Series Title: SPIE - International Society for Optical Engineering. Proceedings
• Series ISSN: 1996-756X
• Book Title: Optical Measurement Systems for Industrial Inspection XII
• ISBN: 9781510643987
• DOI: https://doi.org/10.1117/12.2592426
• Public URL: https://nottingham-repository.worktribe.com/output/23554326
• Publisher URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11782/2592426/Evaluating-and-propagating-uncertainty-in-digital-fringe-projection-systems/10.1117/12.2592426.short