ICAT-EGVE2019

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https://diglib.eg.org/handle/10.2312/2632804

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Browsing ICAT-EGVE2019 by Subject "Applied computing"

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    Evaluation of a Mixed Reality based Method for Archaeological Excavation Support
    (The Eurographics Association, 2019) Gaugne, Ronan; Petit, Quentin; Otsuki, Mai; Gouranton, Valérie; Nicolas, Théophane; Kakehi, Yasuaki and Hiyama, Atsushi
    In the context of archaeology, most of the time, micro-excavation for the study of furniture (metal, ceramics...) or archaeological context (incineration, bulk sampling) is performed without complete knowledge of the internal content, with the risk of damaging nested artefacts during the process. The use of medical imaging coupled with digital 3D technologies, has led to significant breakthroughs by allowing to refine the reading of complex artifacts. However, archaeologists may have difficulties in constructing a mental image in 3 dimensions from the axial and longitudinal sections obtained during medical imaging, and in the same way to visualize and manipulate a complex 3D object on screen, and an inability to simultaneously manipulate and analyze a 3D image, and a real object. Thereby, if digital technologies allow a 3D visualization (stereoscopic screen, VR headset ...), they are not without limiting the natural, intuitive and direct 3D perception of the archaeologist on the material or context being studied. We therefore propose a visualization system based on optical see-through augmented reality that associates real visualization of archaeological material with data from medical imaging. This represents a relevant approach for composite or corroded objects or contexts associating several objects such as cremations. The results presented in the paper identify adequate visualization modalities to allow archaeologist to estimate, with an acceptable error, the position of an internal element in a particular archaeological material, an Iron-Age cremation block inside a urn.
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    Interactive and Immersive Tools for Point Clouds in Archaeology
    (The Eurographics Association, 2019) Gaugne, Ronan; Petit, Quentin; BARREAU, Jean-Baptiste; Gouranton, Valérie; Kakehi, Yasuaki and Hiyama, Atsushi
    In this article, we present a framework for an immersive and interactive 3D manipulation of large point clouds, in the context of an archaeological study. The framework was designed in an interdisciplinary collaboration with archaeologists.We first applied this framework for the study of an 17th-century building of a Real Tennis court. We propose a display infrastructure associated with a set of tools that allows archaeologists to interact directly with the point cloud within their study process. The resulting framework allows an immersive navigation at scale 1:1 in a dense point cloud, the manipulation and production of cut plans and cross sections, and the positioning and visualisation of photographic views. We also apply the same framework to three other archaeological contexts with different purposes, a 13th century ruined chapel, a 19th-century wreck and a cremation urn from the Iron Age.