Joint Calibration of Cameras and Projectors for Multiview Phase Measuring Profilometry

Hyeongjun Cho, Min H. Kim

2025

Abstract

Existing camera-projector calibration for phase-measuring profilometry (PMP) is valid for only a single view. To extend a single-view PMP to a multiview system, an additional calibration, such as Zhang’s method, is necessary. In addition to calibrating phase-to-height relationships for each view, calibrating parameters of multiple cameras, lenses, and projectors by rotating a target is indeed cumbersome and often fails with the local optima of calibration solutions. In this work, to make multiview PMP calibration more convenient and reliable, we propose a joint calibration method by combining these two calibration modalities of phase-measuring pro-filometry and multiview geometry with high accuracy. To this end, we devise (1) a novel compact, static calibration target with planar surfaces of different orientations with fiducial markers and (2) a joint multiview optimization scheme of the projectors and the cameras, handling nonlinear lens distortion. First, we automatically detect the markers to estimate plane equation parameters of different surface orientations. We then solve homography matrices of multiple planes through target-aware bundle adjustment. Given unwrapped phase measurement, we calibrate intrinsic/extrinsic/lens-distortion parameters of every camera and projector without requiring any manual interaction with the calibration target. Only one static scene is required for calibration. Results validate that our calibration method enables us to combine multiview PMP measurements with high accuracy.

Paper Citation

in Harvard Style

Cho H. and Kim M. (2025). Joint Calibration of Cameras and Projectors for Multiview Phase Measuring Profilometry. In Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 3: VISAPP; ISBN 978-989-758-728-3, SciTePress, pages 78-89. DOI: 10.5220/0013145400003912

in Bibtex Style

@conference{visapp25,
author={Hyeongjun Cho and Min Kim},
title={Joint Calibration of Cameras and Projectors for Multiview Phase Measuring Profilometry},
booktitle={Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 3: VISAPP},
year={2025},
pages={78-89},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013145400003912},
isbn={978-989-758-728-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 3: VISAPP
TI - Joint Calibration of Cameras and Projectors for Multiview Phase Measuring Profilometry
SN - 978-989-758-728-3
AU - Cho H.
AU - Kim M.
PY - 2025
SP - 78
EP - 89
DO - 10.5220/0013145400003912
PB - SciTePress