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Di Pietra, Vincenzo; Donadio, Elisabetta; Picchi, D.; Sambuelli, Luigi; Spanò, A. (2017)
Publisher: D. Aguilera, A. Georgopoulos, T. Kersten, F. Remondino, and E. Stathopoulou
Languages: English
Types: Article
Subjects: TA1-2040, T, TA1501-1820, Applied optics. Photonics, Engineering (General). Civil engineering (General), Technology
The paper presents the workflow and the results of an ultrasonic 3D investigation and a 3D survey application aimed at the assessment of the internal integrity of an ancient sculpture. The work aimed at highlighting the ability of methods devoted to the 3D geometry acquisition of small objects when applied to diagnosis performed by geophysical investigation. In particular, two methods widely applied for small objects modelling are considered and compared, the digital Photogrammetry with the Structure from Motion (SFM) technique and hand-held 3D scanners. The study concludes with the aim to enhance the final graphical representation of the tomographic results and to subject the obtained results to a quantitative analysis.

The survey is applied to the Egyptian naophorous statue of Amenmes and Reshpu, which dates to the reign of Ramses II (1279-1213 BC) or later and is now preserved in the Civic Archaeological Museum in Bologna. In order to evaluate the internal persistency of fractures and visible damages, a 3D Ultrasonic Tomographic Imaging (UTI) test has been performed and a multi-sensor survey (image and range based) was conducted, in order to evaluate the locations of the source and receiver points as accurate as possible The presented test allowed to evaluate the material characteristics, its porosity and degradation state, which particularly affect the lower part of the statue. More in general, the project demonstrated how solution coming from the field of 3D modelling of Cultural Heritage allow the application of 3D ultrasonic tomography also on objects with complex shapes, in addition to the improved representation of the obtained results.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Adami A., Balletti C., Fassi F., Fregonese L., Guerra F., Taffurelli L., Vernier P., 2015. The bust of Francesco II Gonzaga: from digital documentation to 3d printing. In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2 (5), pp. 9-15.
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    • doi:10.1088/1742-2132/8/3/S10 Sambuelli, L., Böhm, G., Colombero, C., Filipello, A., 2015.
    • Photogrammetry and 3-D Ultrasonic Tomography to Estimate the Integrity of Two Sculptures of the Egyptian Museum of Turin. In: Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics, Nondestructive Tests and Prospections for Cultural Heritage. doi: 10.3997/2214-4609.201413675 Santos P., Ritz M., Tausch R., Schmedt H., Monroy R., De Stefano A., Posniak O., Fuhrmann C., Fellner D. W., 2014.
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    • Verstockt, S., Gerke M., Kerle N., 2015. Geolocalization of Crowdsourced Images for 3-D Modeling of City Points of Interest." IEEE Geoscience and Remote Sensing Letters, Vol.XII,1670-1674. Accessed August 2015. Doi 10.1109/LGRS.2015.2418816.
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