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Rendu volumique de l'urne de Guipry, impression 3D de l'urne et de la fibule (© Inrap/IRISA/Image ET).

Rendu volumique de l'urne de Guipry, impression 3D de l'urne et de la fibule (© Inrap/IRISA/Image ET).

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A Ciberarqueologia trata da interlocução entre Realidade Virtual e Arqueologia, lidando com o retorno/controle de informações e extroversão de resultados. O projeto Sambaqui Interativo é uma proposta de um aplicativo de simulação eletrônica desenvolvido por pesquisadores do grupo de pesquisa ARISE (MAE/USP) em parceria com o GRUPEP-Arqueologia (UNI...

Citations

... The use of computed tomography algorithms in archaeology still primarily adapts to the possibilities of arbitrary use of medical and industrial hardware. It is only since 2015 that we have seen greater interest from archaeologists and conservators in the use of computed tomography in the processes of conservation, restoration and visualisation of archaeological objects [84][85][86][87][88]. ...
... In recent years there have been efforts in this direction, for example by researchers at the University of Bologna and the Conservazione e Restauro "La Venaria Reale"-CCR of the University of Turin. An important innovation in the use of computed tomography for the conservation of valuable remains of cultural heritage are interdisciplinary projects of some French (e.g., the Introspect project) [84,88], British (RTISAD project), American (e.g., EDUCE project; Mummy project) [87], Canadian, Israeli, Austrian [86] and German [85] university research centres. In collaboration with specialised laboratories of state museums and some private companies, they use computed tomography (CT algorithms) in the planning, conservation and restoration of museum and archaeological exhibits. ...
Article
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A rare and valuable Palaeolithic wooden point, presumably belonging to a hunting weapon, was found in the Ljubljanica River in Slovenia in 2008. In order to prevent complete decay, the waterlogged wooden artefact had to undergo conservation treatment, which usually involves some expected deformations of structure and shape. To investigate these changes, a series of surface-based 3D models of the artefact were created before, during and after the conservation process. Unfortunately, the surface-based 3D models were not sufficient to understand the internal processes inside the wooden artefact (cracks, cavities, fractures). Since some of the surface-based 3D models were taken with a microtomographic scanner, we decided to create a volumetric 3D model from the available 2D tomographic images. In order to have complete control and greater flexibility in creating the volumetric 3D model than is the case with commercial software, we decided to implement our own algorithm. In fact, two algorithms were implemented for the construction of surface-based 3D models and for the construction of volumetric 3D models, using (1) unsegmented 2D images CT and (2) segmented 2D images CT. The results were positive in comparison with commercial software and new information was obtained about the actual state and causes of the deformation of the artefact. Such models could be a valuable aid in the selection of appropriate conservation and restoration methods and techniques in cultural heritage research.
... Cela se révèle particulièrement utile pour planifier efficacement la fouille pour l'archéologie préventive [HARVIG et al., 2012 ;NICOLAS et al., 2014 ;RE et al., 2015], en permettant par exemple de détecter à l'avance certains des éléments dignes d'attention pour la fouille [JANSEN et al., 2006] ou de vérifier l'hypothèse qui sert de base à la fouille [MCKNIGHT et al., 2015]. Elle se montre utile sur de nombreux domaines, comme la céramologie [NICOLAS et al., 2016b], la pédologie [TAINA et al., 2008] ou l'anthropologie [WU et SCHEPARTZ, 2009] et peut aider à remettre en question d'anciennes hypothèses de travail en donnant des détails difficiles à voir à l'oeil nu [MÖDLINGER, 2008 ;FLOHR et al., 2015]. ...
Thesis
Avec la démocratisation de la réalité mixte, un besoin croissant de contenu se fait ressentir. En particulier, on remarque une forte demande, dans divers domaines d’application, pour un contenu interactif et scénarisé. Aussi diversifiés que soient ces domaines, un point commun entre eux est la difficulté pour les experts métiers (médecins, archéologues, ...) de faire comprendre clairement leurs besoins aux développeurs qui implémentent les applications. Cette difficulté amène souvent les experts à se détourner de la réalité mixte ou à l’utiliser de manière détournée. Ainsi, pour assurer une meilleure transmission des connaissances et besoins des experts métiers dans les applications de réalité mixte, nous proposons de donner plus d’impact au rôle de l’expert dans la création d’applications, au travers de deux outils. Le premier permet de construire une application de réalité augmentée en manipulant directement l’environnement pour y ajouter de l’interaction. Le second se concentre sur la scénarisation et permet d’enregistrer un scénario au travers de ses propres actions dans l’environnement virtuel. Cette thèse a également donné lieu à l’application de l’interaction en réalité virtuelle dans le cadre d’applications de fouille archéologique virtuelle, dédiées à proposer aux archéologues de nouvelles méthodes pour l’exploitation de leurs données 3D, dans différents contextes archéologiques.
... Others works using CT scans focus on the preservation of the cremation context (Minozzi et al., 2010), and the use of additive manufacturing to obtain 3D printed copies of objects (Nicolas et al., 2014) where the copies are used as exhibition pieces or educational tools. Nicolas et al. (2016) introduced virtual reality as a method to interact in a virtual environment with 3D printed objects. ...
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Studies of the funeral context of Funerary Urns using X-ray tomography provides a non-invasive method for measuring the context distribution, textural descriptors, topological, and morphological properties of the pieces inside the urns. This work presents a computational framework that provides the methods for processing the raw data produced by clinical X-ray tomography. The objective is to describe the distribution of the elements inside the urn and obtain three-dimensional models of the pieces which compose the funeral context. Subsequently, the models are evaluated using a set of morphological measurements which provide descriptors of each item from a set of funerary urns from the Middle Balsas region in Michoacán, Mexico. It was observed that the distribution of bones and metal objects within the urns was non-uniform. While some general burial practices were observed in some urns, the funerary context in each urn presented a difference in the number of bone fragments or metal volume. In addition, not all urns contained metal objects. The urns which contained metal objects each contained various quantities, and the contexts were distributed differently. This methodology is a way to gather accurate information of the context items’ positions within a three-dimensional environment to understand better the process involved in the funerary practice.