Authors
Haitao Wu, Yiping Cao, Yu Zhang, Jinlong Li, Kai Yang, Jianping Peng, Yingying Wan
Published in
Optics letters. Volume 51. Issue 21. Pages 5942-5945. Nov 01, 2026. Epub Sep 30, 2026.
Abstract
Projector-camera nonlinearity produces carrier-locked phase ripple in four-step fringe projection profilometry. We introduce second-harmonic injection, whose coefficient controls the third-fifth harmonic imbalance through nonlinear intermodulation, while the injected harmonic is rejected by ideal four-step demodulation. A two-stage spatial-reuse calibration selects the coefficient directly from measured ripple, evaluating 22 candidates using eight images. Across eight independent reference-plane projection-capture repetitions, the method achieved a phase RMSE of 0.00617 ± 0.00009 rad (mean ± sample standard deviation), compared with 0.02243 ± 0.00038 rad without correction. Sculpture-model measurements further demonstrated ripple suppression on a complex surface. The method provides efficient active predistortion for repeated four-step profilometry under a stable, calibrated response.
PMID:
42962093
Bibliographic data and abstract were imported from PubMed on 31 Oct 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 15
- Comments 0