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Projet Materials

Materials Research Project

Museums have conflicting constraints: preserve the artifacts they are storing and make them available to public. Cultural artifacts are fragile and light sensitive. 3D scanning is used for sculptures but is limited. 3D printers are also limited in their range of colors. We address the full chain of material acquisition and restitution. Our idea is to scan cultural artifacts, capture all their material geometry and reproduce them. Reproduction can be done through 2.5D printing or virtual reality.

Materials is funded by Agence Nationale de la Recherche (ANR) from October 2015 to September 2019.

News

Goals and Objectives

Museums are operating under conflicting constraints: they have to preserve the artifacts they are storing, while making them available to the public, for viewing, and to researchers for studying. Many cultural artifacts are so fragile that simply exposing them to the light damages them. Recent advances have used 3D scanning, combined with virtual reality and 3D printing for the preservation and study of sculptures, and flatbed scanners for the preservation of books and prints. Both approaches are limited: they acquire the geometry and the color, but not complex material properties.

Several cultural artifacts, such as silk cloths and oil paints, have a subtle and complex appearance: their aspect changes depending on the incoming light and the position of the observer. Current scanners are not able to capture these subtle effects, and existing printers, either 2D or 3D, are unable to reproduce them. Existing research on material appearance shows that this microscopic geometry and color are essential in the overall appearance of materials.

Current 3D printers are limited in their spatial accuracy and in the gamut of colors they can reproduce. On the other hand, 2D printers are very good for spatial accuracy and color management, but are limited in the geometry of what they are printing: a flat surface. One of the partners in this project, Océ Print Logic Technologies, has developed a prototype 2.5D printer, capable of printing protruding surfaces, with the color and spatial accuracy of a 2D printer.

Our goal in this project is to address the entire chain of material acquisition and restitution, based on this micro-geometry. Our idea is to scan complex cultural artifacts, such as cloths, capturing all the geometry of their materials at the microscopic level, then process the information to further reproduce the artifacts for study by public and researchers. Reproduction can be either done through virtual reality or through 3D models.

Publications

Journal articles

2017

titre
Diffraction effects detection for HDR image-based measurements
auteur
Antoine Lucat, Ramon Hegedus, Romain Pacanowski
article
Optics Express, Optical Society of America, 2017, 25 (22), 〈10.1364/OE.25.027146〉
DOI
DOI : 10.1364/OE.25.027146
Accès au bibtex
BibTex
RepresentativeImage.png
titre
A Two-Scale Microfacet Reflectance Model Combining Reflection and Diffraction
auteur
Nicolas Holzschuch, Romain Pacanowski
article
ACM Transactions on Graphics, Association for Computing Machinery, 2017, 36 (4), pp.12. 〈10.1145/3072959.3073621〉
DOI
DOI : 10.1145/3072959.3073621
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01515948/file/paper.pdf BibTex

Conference papers

2017

titre
The Effects of Digital Cameras Optics and Electronics for Material Acquisition
auteur
Nicolas Holzschuch, Romain Pacanowski
article
Workshop on Material Appearance Modeling, Jun 2017, Helsinki, Finland. 2017
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01576742/file/paper.pdf BibTex
titre
Diffraction Prediction in HDR measurements
auteur
Antoine Lucat, Ramon Hegedus, Romain Pacanowski
article
EUROGRAPHICS WORKSHOP ON MATERIAL APPEARANCE MODELING, Jun 2017, Helsinki, Finland. 2017
Accès au texte intégral et bibtex
https://hal.archives-ouvertes.fr/hal-01586466/file/main.pdf BibTex

2016

titre
Isotropic BRDF Measurements with Quantified Uncertainties
auteur
Ramon Hegedus, Antoine Lucat, Justine Redon, Romain Pacanowski
article
EUROGRAPHICS WORKSHOP ON MATERIAL APPEARANCE MODELING, Jun 2016, Dublin, Ireland. 2016, 〈http://egsr2016.scss.tcd.ie/index.php/mam〉
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01342568/file/Isotropic%20BRDF%20Measurements%20with%20Quantified%20Uncertainties.pdf https://hal.inria.fr/hal-01342568/file/Isotropic%20BRDF%20Measurements%20with%20Quantified%20Uncertainties%20-%20Slides.pdf BibTex
teapots.jpg
titre
Capturing Spatially Varying Anisotropic Reflectance Parameters using Fourier Analysis
auteur
Alban Fichet, Imari Sato, Nicolas Holzschuch
article
Graphics Interface Conference 2016, Jun 2016, Victoria, BC, Canada. CHCCS/SCDHM, pp.65-73, 2016, 〈http://graphicsinterface.org/conference/2016/〉. 〈10.20380/GI2016.09〉
DOI
DOI : 10.20380/GI2016.09
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01302120/file/paper.pdf BibTex

Documents associated with scientific events

2017

titre
Un modèle de BRDF bi-échelle combinant : Diffraction et Micro-facettes
auteur
Nicolas Holzschuch, Romain Pacanowski
article
Journée "Tout sur les BRDF", Jun 2017, Poitiers, France
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01545440/file/muGHS_Poitiers_2017.pdf BibTex

2016

RepresentativeImage2.png
titre
Estimating Local Beckmann Roughness for Complex BSDFs
auteur
Nicolas Holzschuch, Anton Kaplanyan, Johannes Hanika, Carsten Dachsbacher
article
ACM Siggraph talks, Jul 2016, Anaheim, CA, United States. 〈10.1145/2897839.2927416〉
DOI
DOI : 10.1145/2897839.2927416
Accès au texte intégral et bibtex
https://hal.inria.fr/hal-01312227/file/talk_abstract.pdf BibTex
(Publication list generated automatically using the HAL archive)