Abstract
The binary defocusing has been extensively studied in the three-dimensional measurement. But if the projector is slightly defocused, the binary fringes after defocusing still contain high-order harmonics compared with the ideal sinusoidal fringes, so the phase error caused by the nonlinear response is not negligible. In this paper, two models are proposed to calculate and compensate phase error, which include a double-precision iterative compensation model (DPICM) and a dual-domain iterative compensation model (DDICM). These two models obtain accurate phase errors by fusing the phases at different precision and domains. DPICM is composed of the double precision method and the improved iterative algorithm, and DDICM consists of the dual-domain method and the improved iterative algorithm. This improved iterative algorithm is used to compensate phase error, which can improve phase accuracy. DPICM and DDICM reduce the RMS error by 25.5% and 13.5% respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 457-469 |
| Number of pages | 13 |
| Journal | Journal of Modern Optics |
| Volume | 70 |
| Issue number | 8 |
| Early online date | 18 Oct 2023 |
| DOIs | |
| Publication status | E-pub ahead of print - 18 Oct 2023 |
Keywords
- three-dimensional shape measurement
- phase error compensation
- iteration algorithm
- phase shifting profilometry