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Proceedings Paper

Three-dimensional reconstruction with x-ray shape-from-silhouette
Author(s): E. Simioni; F. Ratti; I. Calliari; L. Poletto
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Paper Abstract

In the field of restoration of ancient handworks, X-ray tomography is a powerful method to reconstruct the internal structure of the object in non-invasive way. In some cases, such as small objects fully realized with hard metals and completely hidden by clay or products of oxidation, the tomography, although necessary to obtain the 3D appearance of the object, does not give any additional information on its internal monolithic structure. We present here the application of the shape-from-silhouette technique on X-ray images to reconstruct the 3D profile of handworks. The acquisition technique is similar to tomography, since several X-ray images are taken while the object is rotated. Some reference points are placed on a structure co-rotating 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 handwork. We present the analysis of a tin pendant of VI-VIII century b.C. (Venetian area) completely hidden by solid ground. The 3D reconstruction shows surprisingly that the pendant is a very elaborated piece, with two embraced figures that were completely invisible before restoration.

Paper Details

Date Published: 2 September 2010
PDF: 10 pages
Proc. SPIE 7804, Developments in X-Ray Tomography VII, 78040X (2 September 2010); doi: 10.1117/12.861599
Show Author Affiliations
E. Simioni, Istituto di Fotonica e Nanotecnologie, CNR (Italy)
Univ. degli Studi di Padova (Italy)
F. Ratti, Istituto di Fotonica e Nanotecnologie, CNR (Italy)
Univ. degli Studi di Padova (Italy)
I. Calliari, Univ. degli Studi di Padova (Italy)
L. Poletto, Istituto di Fotonica e Nanotecnologie, CNR (Italy)
Univ. degli Studi di Padova (Italy)


Published in SPIE Proceedings Vol. 7804:
Developments in X-Ray Tomography VII
Stuart R. Stock, Editor(s)

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