Share Email Print
cover

Proceedings Paper

Accurate documentation in cultural heritage by merging TLS and high-resolution photogrammetric data
Author(s): Pierre Grussenmeyer; Emmanuel Alby; Pierre Assali; Valentin Poitevin; Jean-François Hullo; Eddie Smigiel
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Several recording techniques are used together in Cultural Heritage Documentation projects. The main purpose of the documentation and conservation works is usually to generate geometric and photorealistic 3D models for both accurate reconstruction and visualization purposes. The recording approach discussed in this paper is based on the combination of photogrammetric dense matching and Terrestrial Laser Scanning (TLS) techniques. Both techniques have pros and cons, and criteria as geometry, texture, accuracy, resolution, recording and processing time are often compared. TLS techniques (time of flight or phase shift systems) are often used for the recording of large and complex objects or sites. Point cloud generation from images by dense stereo or multi-image matching can be used as an alternative or a complementary method to TLS. Compared to TLS, the photogrammetric solution is a low cost one as the acquisition system is limited to a digital camera and a few accessories only. Indeed, the stereo matching process offers a cheap, flexible and accurate solution to get 3D point clouds and textured models. The calibration of the camera allows the processing of distortion free images, accurate orientation of the images, and matching at the subpixel level. The main advantage of this photogrammetric methodology is to get at the same time a point cloud (the resolution depends on the size of the pixel on the object), and therefore an accurate meshed object with its texture. After the matching and processing steps, we can use the resulting data in much the same way as a TLS point cloud, but with really better raster information for textures. The paper will address the automation of recording and processing steps, the assessment of the results, and the deliverables (e.g. PDF-3D files). Visualization aspects of the final 3D models are presented. Two case studies with merged photogrammetric and TLS data are finally presented: - The Gallo-roman Theatre of Mandeure (France); - The Medieval Fortress of Châtel-sur-Moselle (France), where a network of underground galleries and vaults has been recorded.

Paper Details

Date Published: 21 June 2011
PDF: 13 pages
Proc. SPIE 8085, Videometrics, Range Imaging, and Applications XI, 808508 (21 June 2011); doi: 10.1117/12.890087
Show Author Affiliations
Pierre Grussenmeyer, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)
Emmanuel Alby, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)
Pierre Assali, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)
Valentin Poitevin, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)
Jean-François Hullo, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)
Eddie Smigiel, The Image Sciences, Computer Sciences and Remote Sensing Lab. (France)
Institut National des Sciences Appliquées de Strasbourg (France)


Published in SPIE Proceedings Vol. 8085:
Videometrics, Range Imaging, and Applications XI
Fabio Remondino; Mark R. Shortis, Editor(s)

© SPIE. Terms of Use
Back to Top