Ray-based phase error correction for miniaturized DOE projector-based FPP under single-directional hyperbolic projection
This work provides a practical solution for improving 3D reconstruction accuracy in miniaturized FPP systems, which are common in compact sensing devices.
The paper addresses phase artifacts in miniaturized DOE projector-based FPP systems by proposing a ray-based phase error correction framework that models artifacts along projection rays. Experiments show significant improvements in reconstruction accuracy under nonlinear projection conditions.
Fringe Projection Profilometry (FPP) systems using miniaturized DOE pro-jectors often suffer from severe phase artifacts due to nonlinear projection characteristics and limited pattern controllability. We propose a ray-based phase error correction framework that models phase artifacts along projection rays from the projector pinhole, incorporating projector geometry without re-lying on image-domain processing or neighboring pixels. A projector pinhole estimation method based on a single-directional hyperbolic fringe pattern is introduced, through which projector geometry can be recovered without stereo calibration. In addition, a data-efficient strategy constructs the re-finement model from a single calibration pose. Experiments on miniaturized DOE projector-based FPP systems demonstrate significant improvements in reconstruction accuracy under nonlinear projection conditions, confirming the robustness and physical consistency of the proposed approach.