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Proceedings Paper

Digitization of art pieces based on 3D, colour and texture parameters
Author(s): Jean-Pierre Chambard; Vincent Chalvidan; Mohammed Tazeroualti; Frédéric Larue; Jean-Michel Dischler; Virginie Vurpillot; Anne-Claire Legrand
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Paper Abstract

Within the framework of a French research program, we have developed an optical system dedicated to the measurement of works of art. The purpose is to record the actual optical characteristics of the objects' surfaces in order to be able to display the art object on a screen with a high degree of realism. Three types of data are recorded: 3D shape, true colours and texture. The 3D shape is obtained using a structured light sensor that gives a dense point cloud. A specific procedure allows automatic registration of several point clouds without any contact with the surface. The colours maps are recorded with the structured light sensor's RGB camera and using a built-in lighting system. Both camera and lighting are calibrated using a well-defined procedure. Merging the colour data with the 3D data is straightforward because the same camera is used for both tasks. The texture information is related to the so-called BRDF (Bi-directionnal reflectance distribution function): at each point on the surface, the reflectance is a function of the direction of observation and the direction of illumination. To record this complex texture information, several illumination sources are used, as well as an additional moving camera. Thus, for one 3D point cloud, a complete set of colour pictures is processed to produce texture files that are directly linked to the 3D points. The paper details the measurement procedure as well as the associated data processing. Several results are presented.

Paper Details

Date Published: 19 July 2007
PDF: 8 pages
Proc. SPIE 6618, O3A: Optics for Arts, Architecture, and Archaeology, 66180C (19 July 2007); doi: 10.1117/12.725975
Show Author Affiliations
Jean-Pierre Chambard, HOLO3 (France)
Vincent Chalvidan, HOLO3 (France)
Mohammed Tazeroualti, HOLO3 (France)
Frédéric Larue, Le Lab. des Sciences de l'Image, de l'Informatique et de la Télédétection (France)
Jean-Michel Dischler, Le Lab. des Sciences de l'Image, de l'Informatique et de la Télédétection (France)
Virginie Vurpillot, Lab. d'Informatique Graphique et d'Ingénierie de la Vision (France)
Anne-Claire Legrand, Lab. d'Informatique Graphique et d'Ingénierie de la Vision (France)

Published in SPIE Proceedings Vol. 6618:
O3A: Optics for Arts, Architecture, and Archaeology
Costas Fotakis; Luca Pezzati; Renzo Salimbeni, Editor(s)

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