Corinna Rossi, Francesco Fassi, Cristiana Achille
This article presents the latest results as well as an overview of the continuous evolution of the survey methods applied to the extreme desert environment of the Kharga Oasis, in Egypt’s Western Desert. The detailed survey of the architectural and agricultural remains of the Late Roman site of Umm al-Dabadib represent the chance to experiment the application of 3D survey techniques to complex objects. The aim of this research is twofold: pushing the available techniques to their limits in order to obtain innovative results, and eventually obtaining a precise and measurable 3D model of a...
MetroArchaeo 2016
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· 2016
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Antonio Profico, Fabio Di Vincenzo, Luca Bellucci, Flavia Strani, Mary Anne Tafuri, Giorgio Manzi
The archaeological and palaeontological record (including human skeletal remains) often bears crack, damage and deformations. The recent rapid development of the diagnostic potentials of “virtual archaeology” has provided innovative tools to manage, study and preserve cultural and natural heritage. These tools include, among others, CT-scans, Laser-scanning, photogrammetry, 3D imaging and rapid prototyping. This approach can contribute to any archaeological context from its discovery to research, preservation, and dissemination. 3D imaging techniques, for instance, substitute physical...
MetroArchaeo 2016
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· 2016
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Clément Laplaige, Jean-Yves Ramel, Xavier Rodier, Bechir Ben-Rhima
For extraction and characterization of archeological structures from LIDar data, most studies focus on manual spotting (vectorization) or automatic image processing (IP), while few studies have examined semi-automated methods based on machine learning (ML). In the context of the Solidar project, after trying to use classical image processing techniques, we propose to reflect on elements to be integrated in ML approaches for a better and a more flexible extraction and characterization of archeological structures discovered in the LiDAR datasets. Indeed, the LiDAR data reveal many varied...
MetroArchaeo 2016
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· 2016
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Elisabetta Di Francia, Ruth Lahoz, Emma Angelini, Sabrina Grassini, Marco Parvis
The main goal of this study is to design and optimize a low-invasive laser cleaning treatment for metallic cultural heritage artefacts. The treatment should remove the dangerous corrosion products without affecting the original surface of the artefacts. The pulsed laser cleaning process is performed, in this preliminary step, with a near-IR Q-switched Yb:YAG fibre laser on artificially patinated Cu-based reference samples. A morphological and microstructural investigation has been carried out on the specimens submitted to the cleaning process in order to evaluate the effects of the different...
MetroArchaeo 2016
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· 2016
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Bojana Radojkovic, Slavica Ristic, Suzana Polic, Aleksandar Krmpot, Branislav Salatic, Jovana Orlic, Filip Vucetic
The use of lasers in the conservation of artefacts plays an important role since its posibilities of safe, efficient and efective cleaning on complex surfaces and wide range of materials. This paper presents the results of the laser cleaning effects on ceramic medieval artefacts originated from archaeological sites from region of Tyre and Sidon, Lebanon and naturally tarnished brass plate (unknown origin). Nd:YAG and Er:Glass lasers were used to clean unwanted layers from artefact surface. Before these investigations, some preliminary analyses were conducted on the comparable contemporary...
MetroArchaeo 2016
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Andrea Taschin, Paolo Bartolini, Jordanka Tassaneva, Jana Striofa, Raffaella Fontana, Cristiano Riminesi, Renato Torre
We develop an original experimental procedure and a comprehensive method of data analysis to measure the optical parameters of drawing media in the THz spectral range. The method based on the THz – Time Domain Spectroscopy is applied to recover material parameters on drawing inks deposited on polyethylene pellicles with thicknesses down to tens of micrometers. In particular, we investigated three commercial inks: a red ink (based on cochineal carmine), a blue ink (indigo) and a black ink (irongall). The implemented experimental procedure and numerical method enable us to extract the...
MetroArchaeo 2016
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Eleonora Destefanis, Elena Basso, Gabriele Ardizio
The Cluny Priory of Castelletto Cervo (Biella, Piedmont) was deeply investigated from 2006 to 2014, in a multidisciplinary project. This contribution deals with the methodological approach followed for the archaeometric study of mortars, and the results in term of material knowledge and reading of the building phases in a time interval of about a millennium. Petrographic observations combined with microchemical data showed that the local raw materials were exploited during a very long time span: the aggregates are polygenic sands, with a high percentage of volcanic rock grains, coming from...
MetroArchaeo 2016
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M. E. Fedi, L. Liccioli, P. A. Mandò
One of the fundamental hypotheses the radiocarbon dating technique is based on is the fact that the sample to be dated has to be considered as a close system. However, when we would like to date a finding that has been restored, that hypotesis might be called into question. Any carbon-based material used for restoration has to be completely removed from the sample before the radiocarbon measurement, in order not to alter the results.
MetroArchaeo 2016
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· 2016
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Nicolas Garnier, Bastien Dubuis
The excavations in Lavau brought in light a large monumental necropolis with a burial mound in its center overlying the inviolate chieftain 's grave from the end of the 1st Iron Age or beginning of the 2nd one. In the funerary chamber a rich furniture accompanies the dead: a bronze cauldron containing serving and drinking vessels in ceramic, silver, and bronze, two bronze plates, and a cist. As the inner surface of the cauldron presents visible deposits, a series of samples was taken off from different parts of the cauldron and the local oenochoe. Using a doublestep methodology of extraction...
MetroArchaeo 2016
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· 2016
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D. Ciofini, S. Siano
On the wake of recent successful applications of LQS Nd:YAG (1064 nm) laser in conservation of modern easel paintings, here, we focus on the study of undesired side effects of the laser treatment that can occur in photosensitive modern paints. Understanding the phenomenology and nature of their alterations has a crucial importance for extending the laser approach in conservation. In the present work, a measurement methodology for characterising the sub-ablative effects of photosensitive paint layers was developed. The analytical approach was refined by considering the example case of cadmium...
MetroArchaeo 2016
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· 2016
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