Charbonnier, Pierre

Foucher, Philippe

Grussenmeyer, Pierre

Guillemin, Samuel

Koehl, Matthieu

Moisan, Emmanuel

Maintaining canal tunnels is not only a matter of cultural and historical preservation, but also a commercial necessity and a security issue.
This contribution adresses the problem of building a full 3D reference model of a canal tunnel by merging SONAR (for underwater
data recording) and LASER data (for the above-water parts). Although both scanning devices produce point clouds, their properties are
rather different. In particular, SONAR data are very noisy and their processing raises several issues related to the device capacities, the
acquisition setup and the tubular shape of the tunnel. The proposed methodology relies on a denoising step by meshing, followed by the
registration of SONAR data with the geo-referenced LASER data. Since there is no overlap between point clouds, a 3-step procedure
is proposed to robustly estimate the registration parameters. In this paper, we report a first experimental survey, which concerned the
entrance of a canal tunnel. The obtained results are promising and the analysis of the method raises several improvement directions
that will help obtaining more accurate models, in a more automated fashion, in the limits of the involved technology

E. Moisan

P. Charbonnier

P. Foucher

P. Grussenmeyer

S. Guillemin

M. Koehl

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BUILDING A 3D REFERENCE MODEL FOR CANAL TUNNEL SURVEYING USING SONAR AND LASER SCANNING

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BUILDING A 3D REFERENCE MODEL FOR CANAL TUNNEL SURVEYING USING SONAR AND LASER SCANNING

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Archive Ouverte en Sciences de l'Information et de la Communication