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Proceedings Paper

Shape-from-silhouette for three-dimensional reconstruction from x-ray radiography
Author(s): E. Simioni; F. Ratti; L. Poletto
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Paper Abstract

We present the application of the shape-from-silhouette algorithm to reconstruct the 3D profile of handworks from a set of X-ray absorption images taken at different angles around the object. The acquisition technique is similar to tomography, but the number of images that are required to reconstruct the 3D appearance is very low compared to tomography, therefore the acquisition time is substantially reduced. Some reference points are placed on a structure corotating with the object and are acquired on the images for calibration and registration. The shape-from-silhouette algorithm gives finally the 3D appearance of the object. We present the analysis of a tin pendant from the Venetic area, VI century b.C., that was completely hidden by corrosion products and solid ground at the moment of the retrieval. The 3D reconstruction shows that the pendant is a very elaborated piece, with two embraced figures that were completely invisible before restoration.

Paper Details

Date Published: 6 June 2011
PDF: 9 pages
Proc. SPIE 8084, O3A: Optics for Arts, Architecture, and Archaeology III, 80840I (6 June 2011); doi: 10.1117/12.888407
Show Author Affiliations
E. Simioni, Univ. degli Studi di Padova (Italy)
F. Ratti, Univ. degli Studi di Padova (Italy)
L. Poletto, Univ. degli Studi di Padova (Italy)

Published in SPIE Proceedings Vol. 8084:
O3A: Optics for Arts, Architecture, and Archaeology III
Luca Pezzati; Renzo Salimbeni, Editor(s)

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