Search Results (5)

This work and manuscript focus on how 3D scanning methodologies and post-processing analyses may help us to gain a deeper investigation of cuneiform tablets beyond the written content. The dataset proposed herein is a key part of the archaeological collection preserved in the Musei Reali of Turin in Italy; these archaeological artefacts enclose further important semantic information extractable through detailed 3D documentation and 3D model filtering. In fact, this scanning process is a fundamental tool for better reading of sealing impressions beneath the cuneiform text, as well as for understanding micrometric evidence of the fingerprints of scribes. Most of the seal impressions were made before the writing (like a watermark), and thus, they are not detectable to the naked eye due to cuneiform signs above them as well as the state of preservation. In this regard, 3D scanning and post-processing analysis could help in the analysis of these nearly invisible features impressed on tablets. For this reason, this work is also based on how 3D analyses may support the identification of the unperceived and almost invisible features concealed in clay tablets. Analysis of fingerprints and the depths of the signs can tell us about the worker’s strategies and the people beyond the artefacts. Three-dimensional models generated inside the Artec 3D ecosystem via Space Spider scanner and Artec Studio software were further investigated by applying specific filters and shaders. Digital light manipulation can reveal, through the dynamic displacement of light and shadows, particular details that can be deeply analysed with specific post-processing operations: for example, the MSII (multi-scale integral invariant) filter is a powerful tool exploited for revealing hidden and unperceived features such as fingerprints and sealing impressions (stratigraphically below cuneiform signs). Finally, the collected data will be handled twofold: in an open-access repository and through a common data environment (CDE) to aid in the data exchange process for project collaborators and common users. Full article

Soluble salts and clays are major intrinsic causes of degradation of porous cultural heritage materials. Identifying their presence and concentrations can allow environmental control to prevent decay before it is observed. Such control is often energy- and carbon-intensive and better targeted towards those objects that require it rather than a general approach. The use of poultices has been investigated to determine salt species and concentrations in stone to replace drilling samples. A non-invasive method using two types of moisture meter has been developed to map the conductivity of salt solutions in stone. Fourier transform and near-infrared spectroscopies have been investigated to non-invasively quantify the amount of muscovite clay in limestones without the need to take drilled samples. Salts can react with extrinsic acetic acid from display and storage environments, causing extensive damaging surface efflorescences. A rapid analytical procedure based on external reflectance Fourier transform infra-red (FTIR) microscopy has been developed. This allows analysis of multiple salts on a cuneiform tablet surface. Analyses of soluble salts inside the tablets has indicated the sulphate-to-chloride ratio is a good predictor of whether mixed acetate efflorescences will occur on exposure. Full article

This paper deals with a metrological and qualitative evaluation of the Artec 3D structured-light scanners: Micro and Space Spider. As part of a larger European project called ITSERR, these scanners are tested to reconstruct small archaeological artefacts, in particular cuneiform tablets with different dimensions. For this reason, Micro and Space Spider are compared in terms of the entire workflow, from preparatory work to post-processing. In this context, three cuneiform replica tablets will serve as examples on which the Artec scanners will have to prove their worth. Metric analyses based on distance maps, RMSe calculations and density analyses will be carried out to understand metrological differences between these tools. The creation of 3D models of cuneiform tablets is the first step in developing a virtual environment suitable for sharing the archaeological collection with collaborators and other users. The inclusion of semantic information through specific ontologies will be the next step in this important project. Full article

The ancient city of Jericho, located at the archaeological site of Tell es-Sultan west of the Jordan River and adjacent to the Ein es-Sultan spring on the edge of modern Jericho, has often been associated with the biblical city of Jericho and the story found in the book of Joshua. The identification of Jericho with Tell es-Sultan is not disputed, and numerous excavation teams have affirmed Tell es-Sultan as Jericho. While excavations have also uncovered the fiery destruction of a walled city at Jericho, the date of the fall of Bronze Age Jericho and the association of this destruction with the narrative in the book of Joshua have been a point of disagreement among archaeologists for more than a century. The first excavations at Jericho (Tell es-Sultan) occurred in 1868 under the direction of Charles Warren, followed by soundings conducted by FJ Bliss in 1894, the expeditions of the years 1907–1909 and 1911 by Ernst Sellin and Carl Watzinger, the excavations of 1930–1936 directed by John Garstang, the 1952–1958 project of Kathleen Kenyon, brief excavations by Shimon Riklin in 1992, and the most recent excavations and restorations by the joint Italian–Palestinian team from 1997 to 2000 under Nicolo Marchetti and Lorenzo Nigro, followed by the 2009–2017 seasons directed by Jehad Yasin, Hamdan Taha, and Lorenzo Nigro. Although there is a significant deviation in views over the exact date of the destruction and abandonment, archaeological analyses of Jericho generally agree on the manner in which the city met its end, including a widespread fire, collapsed mudbrick walls, burning of the stored grain, and abandonment. However, assessing all of the archaeological data from Jericho IVc, both new and old, including pottery wares, Egyptian scarabs, a cuneiform tablet, stratigraphic analysis, and radiocarbon samples, allows a more definitive historical reconstruction concerning the chronology of the destruction of Jericho and its connections to the biblical narratives. Full article

In the current panorama of 3D digital documentation, the survey of tiny artifacts with micrometric details is strongly influenced by two factors: firstly, the still high cost of the instruments and technologies (active sensors) required to achieve the necessary level of accuracy and resolution; secondly, the needed professional skills for the macro-photogrammetric approach. In this context, this research aims to meet the demand for a digital survey and 3D representation of small objects with complex surfaces and sub-millimeter morphological characteristics using a low-cost configuration (passive sensors) for an image-based approach. The experiments concerned cuneiform tablets, which are challenging due to their morphological and geometrical characteristics. The digital replica of these unique artefacts can be helpful for their study and interpretation and many innovative applications: access and sharing, a collaborative interdisciplinary study among several experts, experimentation with machine learning for automatic character recognition, and linguistic studies. The micrometric surveying system described proves to be an efficient and reliable solution for cuneiform tablet digitization and documentation. Full article