We present the application of the shape-from-silhouette technique to reconstruct the three-dimensional profile of ancient handworks from their x-ray absorption images. The acquisition technique is similar to tomography, since the images are taken all around the object while it is rotated. Some reference points are placed on a small and light structure corotating with the object, and are acquired on the images for calibration and registration. The reconstruction algorithm gives finally the three-dimensional appearance of the handwork. We present the analysis of a bronze pendant of VI–VII century B.C. (Venetic area, Italy) completely hidden by corrosion products. The three-dimensional reconstruction shows that the pendant is a very elaborated piece, with two embraced figures that were completely invisible at the excavation.
© 2011 Optical Society of America
Original Manuscript: March 7, 2011
Revised Manuscript: April 15, 2011
Manuscript Accepted: April 30, 2011
Published: June 29, 2011
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics
Emanuele Simioni, Filippo Ratti, Irene Calliari, and Luca Poletto, "Three-dimensional modeling using x-ray shape-from-silhouette," Appl. Opt. 50, 3282-3288 (2011)