Calibration of a three-dimensional profilometry system by temporal phase unwrapped algorithms

Jorge L. Flores; Antonio Muñoz; Guillermo García-Torales; Jesus Villa; Ramon Navarro; Héctor Santiago-Hernández

doi:10.1117/12.2568852

20 August 2020 Calibration of a three-dimensional profilometry system by temporal phase unwrapped algorithms

Jorge L. Flores, Antonio Muñoz, Guillermo García-Torales, Jesus Villa, Ramon Navarro, Héctor Santiago-Hernández

Proceedings Volume 11502, Infrared Remote Sensing and Instrumentation XXVIII; 115020U (2020) https://doi.org/10.1117/12.2568852
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Conference Poster

Abstract

In this work, we proposed a procedure for the calibration of 3D surface shape measurement system, which is based on fringe projection and phase shifting algorithms. Our approach consists in the use of temporal phase unwrapping methods to determine the phase-to-height mapping relationship. In particular, we propose the use of the two-step temporal phase-unwrapping algorithm. For that, two sequences of fringe patterns (low and high sensitivity) are projected onto the reference plane, which is shifted perpendicularly to the camera-projector plane. Then, the phase maps at each shifting step are retrieved from acquired sequences of sinusoidal intensity patterns using the two-step temporal unwrapping formula. Finally, using the phase maps at well-known in a least-squares scheme, the system parameters, nonlinear model of calibration, are estimated, i.e. the phase-to-height mapping relationship. Validation experiments are presented.

Citation Download Citation

Jorge L. Flores, Antonio Muñoz, Guillermo García-Torales, Jesus Villa, Ramon Navarro, and Héctor Santiago-Hernández "Calibration of a three-dimensional profilometry system by temporal phase unwrapped algorithms", Proc. SPIE 11502, Infrared Remote Sensing and Instrumentation XXVIII, 115020U (20 August 2020); https://doi.org/10.1117/12.2568852

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