Shape from Mirrored Polarimetric Light Field

Shunsuke Nakagawa, Takahiro Okabe, Ryo Kawahara

2025

Abstract

While mirror reflections provide valuable cues for vision tasks, recovering the shape of mirror-like objects remains challenging because they reflect their surroundings rather than displaying their own textures. A common approach involves placing reference objects and analyzing their reflected correspondences, but this often introduces depth ambiguity and relies on additional assumptions. In this paper, we propose a unified framework that integrates polarization and geometric transformations for shape estimation. We introduce a 9-dimensional polarized ray representation, extending the Plücker coordinate system to incorporate the polarization properties of light as defined by the plane of its electric field oscillation. This enables the seamless evaluation of polarized ray agreement within a homogeneous coordinate system. By analyzing the constraints of polarized rays before and after reflection, we derive a method for per-pixel shape estimation. Our experimental evaluations with synthetic and real images demonstrate the effectiveness of our method qualitatively and quantitatively.

Paper Citation

in Harvard Style

Nakagawa S., Okabe T. and Kawahara R. (2025). Shape from Mirrored Polarimetric Light Field. In Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 2: VISAPP; ISBN 978-989-758-728-3, SciTePress, pages 790-796. DOI: 10.5220/0013389800003912

in Bibtex Style

@conference{visapp25,
author={Shunsuke Nakagawa and Takahiro Okabe and Ryo Kawahara},
title={Shape from Mirrored Polarimetric Light Field},
booktitle={Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 2: VISAPP},
year={2025},
pages={790-796},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013389800003912},
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 2: VISAPP
TI - Shape from Mirrored Polarimetric Light Field
SN - 978-989-758-728-3
AU - Nakagawa S.
AU - Okabe T.
AU - Kawahara R.
PY - 2025
SP - 790
EP - 796
DO - 10.5220/0013389800003912
PB - SciTePress