An Assessment of Laser Range Measurement of Marble Surfaces

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ConferenceProceedings of the 5th Conference on Optical 3-D Measurement Techniques, October 1-4, 2001., Vienna, Austria
Subjectlaser range sensing; optical surface measurement; marble; heritage applications; mesure optique des surfaces; marbre; applications patrimoniales
AbstractAn important application of laser range sensing is found in the 3D scanning and modelling of heritage collections, and of sculptures in particular. Since a significant proportion of the statues in the world's museums is composed of marble, the optical properties of this material under laser range sensing need to be understood. Marble's translucency and heterogeneous structure produce significant bias and increased noise in the geometric measurement. Experiments on a sample of Carrara Statuario marble highlight the relationship between the laser spot diameter and the estimated noise levels in the geometric measurements. A bias in the depth measurement is also observed. These phenomena are believed to result from scattering on the surface of small crystals at or near the surface.
Publication date
AffiliationNRC Institute for Information Technology; National Research Council Canada
Peer reviewedNo
NRC number44210
NPARC number5208716
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Record identifier1a3b04df-9139-4dad-90ec-9c141cefbd23
Record created2008-12-02
Record modified2016-05-09
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