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Acquisition opto-numérique de vêtements asiatiques anciens

Antoine Lucat 1, 2 
1 MANAO - Melting the frontiers between Light, Shape and Matter
LaBRI - Laboratoire Bordelais de Recherche en Informatique, Inria Bordeaux - Sud-Ouest, LP2N - Laboratoire Photonique, Numérique et Nanosciences
Abstract : Digitization is a major issue of interest in the field of cultural heritage, allowing on the one hand the long-term safeguard of collector’s pieces, and on the other hand to valorize them under a new revelatory way. In collaboration with the Musée d’Ethnographie de Bordeaux (MEB), this thesis work has the objective of proposing an innovative solution in terms of digitization, by answering the following problem : how to faithfully reproduce the appearance of a collector’s piece, such that the digital version is, to the eye, indistinguishable from the real object ? The size of the objects to be digitized as well as the resolution necessary to obtain the desired quality imply an astronomical quantity of measurements to be carried out, forming a real technical and scientific challenge. This thesis proposes to respond to this observation by producing an innovative imagebased acquisition prototype, formed by a dome covered with 1080 LEDs within which a camera on a robotic arm evolves. This work is first supported by a bundle of preliminary research, focusing on the theoretical and practical issues attached to such a measurement. This notably made it possible to highlight to what extent diffraction plays an important role in BRDF measurements, far beyond the usual criteria. In this sense, a new metrologically viable data processing algorithm has been proposed. Supported by these achievements, the digitization prototype has been designed, produced, calibrated and finally successfully used for the safeguarding of the cultural heritage. This new, constantly evolving instrument then lays the foundation stone for many areas of future research, both focused on optimizing the measurement process and on exploiting the generated data.
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Submitted on : Monday, April 19, 2021 - 2:37:18 PM
Last modification on : Sunday, June 26, 2022 - 3:07:33 AM
Long-term archiving on: : Tuesday, July 20, 2021 - 6:55:15 PM


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  • HAL Id : tel-03202022, version 1



Antoine Lucat. Acquisition opto-numérique de vêtements asiatiques anciens. Traitement des images [eess.IV]. Université de Bordeaux, 2020. Français. ⟨NNT : 2020BORD0012⟩. ⟨tel-03202022⟩



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