Ray-based phase error correction for miniaturized DOE projector-based FPP under single-directional hyperbolic projection
arXiv:2607.15139
The paper introduces a ray‑based method to correct phase errors in miniaturized DOE projector fringe‑projection systems by estimating the projector pinhole from a single hyperbolic fringe pattern and building a refinement model from one calibration pose.
Abstract
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.