Phase error model and compensation method for reflectivity and distance discontinuities in fringe projection profilometry Article Swipe

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Classification of discontinuities Discontinuity (linguistics) Optics Profilometer Structured-light 3D scanner Compensation (psychology) Observational error Phase (matter) Projection (relational algebra) Computer science Algorithm Physics Mathematics Mathematical analysis Surface roughness Scanner Psychoanalysis Quantum mechanics Statistics Psychology

Chang‐Ping Hu , Shuntao Liu , Dan Wu , Jing Xu ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.1364/oe.482158 · OA: W4313558422

Phase shifting fringe projection profilometry is a widely used optical 3D surface measurement method due to its high resolution, high speed, and full-field inspection. However, the measurement accuracy decreases in regions with a reflectivity or distance discontinuity. To this end, first, a general continuous quasi-one-dimensional phase error model is proposed for discontinuity representation. Second, the discontinuities are further divided into degenerate and nondegenerate discontinuities to improve the computational speed. Third, a phase error compensation algorithm is proposed with a parameter estimation method to improve the measurement accuracy. Simulations and experiments demonstrate that the proposed methods are effective.