La Coupole: an SVBRDF measurement device for large and non-planar objects

Abstract

We present La Coupole , a device for measuring SVBRDF of large, non-planar objects, which aims at reproducing the appearance of an object as it would be seen under any lighting conditions and as perceived by the human eye at a minimal distance of approximately 30 cm. The ultimate goal is to provide virtual tools for the visualization, inspection, and diagnosis of ancient and fragile objects. With this in mind, we compare three BRDF representations for reconstructing any measured BRDF: two of them — spherical harmonics and radial basis functions — do not make any prior assumptions about the data, whereas the third one, a GGX microfacet-based model, is a parametric representation. The paper also provides details of the geometric and radiometric calibration process, along with an in-depth study of their respective uncertainties.

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BibTeX RIS

BibTeX

@article{lucat2026coupole,
  title = {{La Coupole: an SVBRDF measurement device for large and non-planar objects}},
  author = {Antoine Lucat and Pierre Mézières and François Margall and Louis de Oliveira and Marjorie Paillet and Arnaud Tizon and Pierre Bénard and Romain Pacanowski},
  journal = {Optics Express},
  year = {2026},
  month = oct,
  doi = {10.1364/oe.587877},
  url = {https://hal.science/hal-05565298v2},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - La Coupole: an SVBRDF measurement device for large and non-planar objects
AU  - Antoine Lucat
AU  - Pierre Mézières
AU  - François Margall
AU  - Louis de Oliveira
AU  - Marjorie Paillet
AU  - Arnaud Tizon
AU  - Pierre Bénard
AU  - Romain Pacanowski
PY  - 2026
DA  - 2026/10/19
JO  - Optics Express
DO  - 10.1364/oe.587877
UR  - https://hal.science/hal-05565298v2
AB  - We present La Coupole , a device for measuring SVBRDF of large, non-planar objects, which aims at reproducing the appearance of an object as it would be seen under any lighting conditions and as perceived by the human eye at a minimal distance of approximately 30 cm. The ultimate goal is to provide virtual tools for the visualization, inspection, and diagnosis of ancient and fragile objects. With this in mind, we compare three BRDF representations for reconstructing any measured BRDF: two of them — spherical harmonics and radial basis functions — do not make any prior assumptions about the data, whereas the third one, a GGX microfacet-based model, is a parametric representation. The paper also provides details of the geometric and radiometric calibration process, along with an in-depth study of their respective uncertainties.
SN  - 1094-4087
ER  -

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