Defocused binary fringe phase error modeling and compensation using depth-discrete Fourier series fitting

Jingcheng Hu, Shaohui Zhang*, Yao Hu, Qun Hao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The binary defocus fringe projection is a widely adopted way to increase the speed of fringe projection profilemotry. However, the projected patterns may deviate from ideal ones at some depths. We propose a theoretical model and a corresponding compensation method to explain and calibrate the phase error of defocus-projected patterns. We first low-pass filter the projected patterns at different depths to obtain corresponding ideal ones. Then, we calibrate the model coefficients based on the errors between the original and ideal fringe patterns. The calibrated phase error model can be used to compensate the phase error at arbitrary depths within the calibration volume. Experiments are conducted to verify the feasibility and performance of the proposed method.

Original languageEnglish
Pages (from-to)10047-10054
Number of pages8
JournalApplied Optics
Volume60
Issue number32
DOIs
Publication statusPublished - 10 Nov 2021

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