References of "Hallot, Pierre"
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See detailA Built Heritage Information System Based on Point Cloud Data: HIS-PC
Poux, Florent ULiege; Billen, Roland ULiege; Kasprzyk, Jean-Paul ULiege et al

in ISPRS International Journal of Geo-Information (2020), 9(10), 588

The digital management of an archaeological site requires to store, organise, access and represent all the information that is collected on the field. Heritage building information modelling ... [more ▼]

The digital management of an archaeological site requires to store, organise, access and represent all the information that is collected on the field. Heritage building information modelling, archaeological or heritage information systems now tend to propose a common framework where all the materials are managed from a central database and visualised through a 3D representation. In this research, we offer the development of a built heritage information system prototype based on a high-resolution 3D point cloud data set. The particularity of the approach is to consider a user-centred development methodology while avoiding meshing/down-sampling operations. The proposed system is initiated by a close collaboration between multi-modal users (managers, visitors, curators) and a development team (designers, developers, architects). The developed heritage information system permits the management of spatial and temporal information, including a wide range of semantics using relational along with NoSQL databases. The semantics used to describe the artifacts are subject to conceptual modelling. Finally, the system proposes a bi-directional communication with a 3D interface able to stream massive point clouds, which is a big step forward to provide a comprehensive site representation for stakeholders while minimising modelling costs. [less ▲]

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See detailMay digital reconstruction tools help preserving the material and evocative value of fragments? The case of Victor Horta’s Hôtel Aubecq in Brussels.
Houbart, Claudine ULiege; Hallot, Pierre ULiege

Conference (2020, October)

Built between 1900 and 1904 along the avenue Louise in Brussels, the hôtel Aubecq is considered one of the masterpieces of Art Nouveau architect Victor Horta. But it was also one of the first victims of ... [more ▼]

Built between 1900 and 1904 along the avenue Louise in Brussels, the hôtel Aubecq is considered one of the masterpieces of Art Nouveau architect Victor Horta. But it was also one of the first victims of the disaffection from which this ephemeral artistic movement suffered and of the real estate speculation that led, in the post-World War II period, to the disappearance of many historical buildings in favour of more profitable ones. In 1948, the building is sold by the descendants of Gustave Aubecq, and two years later, demolished and replaced by apartment buildings. Only a few people protest against this demolition : as illustrated by the demolition of the Maison du Peuple more than 15 years later, it will still take time for Art Nouveau to regain public interest. But on the initiative of Horta’s widow together with one of the architect’s latest collaborators, Jean Delhaye, the dismantling of the main façade of the building is funded by the Ministry of Public works. During the next half century, the fragments of the façade (composed of around 600 stones as well as window frames and metalworks), which are the property of Belgian State, are moved several times from one site to another. Discussions and projects periodically arise, all of them considering the rebuilding of the façade : the debates are limited to the question whether it should be reused in the construction of a building, or whether it should be rebuilt in a museum context. In 2000, the fragments are handed in by the State to the Brussels Region, right at the moment when four of the main creations of the architect, all situated in Brussels, are inscribed on the World Heritage List, and Art Nouveau architecture becomes one of the main touristic assets of the capital. In that context, a study and thorough digital survey of the fragments is commissioned1, leading to a horizontal anastylosis of the façade, made public by an exhibition in 20112. But this initiative didn’t lead to any concrete long-term projects, and the stone fragments, which have remained in the warehouse where the exhibition took place, have been vandalised while the window frames have been partially burned and the metalworks, probably sold for the price of the metal. In consequence, the Brussels Region has decided to store the fragments in containers, and to ask the architects in charge of the new KANAL Contemporary Art Centre, to valorise them in collaboration with the CIVA (Centre international pour Ville, l’Architecture et le Paysage) inside the new complex. During the last year, and exhibition of a few stones and further debates have been organised inside the future museum.3 This exhibition is an invitation to broaden the range of possibilities for the fragments valorization: 16 stones, positioned on an orthogonal grid on te ground, are presented as separate art objects. Our research on this very stimulating issue started with a workshop we organised with students of the University of Liège, in collaboration with the institutions, architects and administrations involved in March 2019. This lead us to consider the opportunities and limits of the use of the available digital survey of the fragments for the valorisation projet. As to the opportunities, it appears that the existence of a digital clone may help develop two opposed valorisation choices at the same time: reconstruction, and preservation of the fragmentary state. As shown by the guestbook of the 2011 exhibition, a large part of the public would like the façade to be rebuilt, in order to recover or at least be able to perceive a part of the lost masterpiece. The fact that the digitisation took place before the disappearance or degradation of some elements makes it possible to virtually rebuilt the whole façade. But at the same time, the fragments in themselves bear very strong scientific and evocative values: the perception of their scale, texture and details delivers important information on construction history, as well as a powerful evocation of the fragility of heritage in the face of fluctuating value judgments through time, a value that would disappear with a material reconstruction. As to the limits, we have to bear in mind that the fragments have been digitised more than ten years ago, with technologies that have continued to evolve in terms of completeness and accuracy (to include, i.a. information on texture, colour, etc). The fragments storage environment makes it impossible to scan anew: so besides the reflection on valorisation options, the research also aims to study how, starting from a mesh acquisition resulting from a white light scanner, we can propose a digital reconstruction of the facade considering the difficulties of the old acquisition’s use and the inadequacy between the current representation objectives and the initial documentation criteria’s. [less ▲]

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See detailDigital Twin: Research Framework to Support Preventive Conservation Policies
Jouan, Pierre-André ULiege; Hallot, Pierre ULiege

in ISPRS International Journal of Geo-Information (2020), 9

Preventive strategies for the conservation of heritage sites have gradually been preferred to curative approaches because of their ability to maintain their significance. Furthermore, most experts now ... [more ▼]

Preventive strategies for the conservation of heritage sites have gradually been preferred to curative approaches because of their ability to maintain their significance. Furthermore, most experts now agree that conservation management of heritage places based on a common understanding of their cultural values is essential to address all the particularities of their contexts. Recently, significant research has demonstrated the potential of Heritage Building Information Modelling (HBIM) for the collaborative data management in conjunction with conservation projects. The recent development of HBIM web platforms illustrates the value of strengthening the link between the digital model and the physical realm of heritage assets. This paper advocates the application of Digital Twin’s (DT) principles, using HBIM models as a digital replica, to support the preventive conservation of heritage places. Based on an extensive literature review, a comprehensive framework that integrates the DT into the management plan process for the preventive conservation of built heritage is proposed. Several recommendations for its implementation are finally discussed, such as the identification of tangible features of significance, the threats associated with their integrity and the corresponding mitigation strategies, with particular emphasis on the value assessment process. The result is a data model for structuring information on preventive conservation strategies. This framework provides the basis for future implementation and demonstrates the need for a DT approach in this context. [less ▲]

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See detailNumérisation du patrimoine, l'ultime sauvegarde
Hallot, Pierre ULiege

Scientific conference (2020, March 04)

Les méthodologies de documentation du patrimoine bâti se sont complétées ces dernières années par de nouvelles techniques de relevé produisant une information de plus en plus complète et réaliste ... [more ▼]

Les méthodologies de documentation du patrimoine bâti se sont complétées ces dernières années par de nouvelles techniques de relevé produisant une information de plus en plus complète et réaliste. L’identification de l’authenticité du patrimoine repose, notamment, sur l’interprétation des documents, des plans, des données collectés grâce à l’observation d’un bien. Toute observation d’un aspect du patrimoine se doit d’être la plus objective possible afin de ne pas biaiser la reconstruction de la réalité basée sur cette représentation. Rappelons que toute représentation ne symbolise qu’une partie de la réalité selon un point de vue, un contexte, une technique donnée. La multiplication des techniques d’acquisition et de numérisation du patrimoine (lasergrammétrie, photogrammétrie, …) engendre de plus en plus de représentations biaisées – ou non objectivée – du patrimoine. Dans le cadre de cette présentation, nous décrivons les bases indispensables d’une documentation pour laquelle les processus de collecte de données sont normalisés afin d’identifier, quantifier et expliquer les limites des jeux de données produits. Ceci permet de « visualiser » le biais de représentation entre le modèle et la réalité et de ne pas induire de mauvaise interprétation. Actuellement, il est de plus en plus fréquent que la représentation numérique du patrimoine soit la seule description encore disponible des aspectés géométriques d’un bien. Dans ce cas, la conservation du modèle numérique revêt une importance capitale car il représente seul vestige porteur de certaines valeurs patrimoniales du bien. La présentation montrera, par quelques exemples l’importance et la difficulté de rendre un modèle numérique authentique. [less ▲]

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See detailJeux Vidéo Et Protestations Civiques Et Politiques Développer La Littératie Spatiale Des Manifestants Urbains Grâce Au Jeu Vidéo ?
Bashandy, Hamza ULiege; Hallot, Pierre ULiege; Dozo, Björn-Olav ULiege

in Géographie et Cultures (2020), 109

This article proposes an analysis of the links between the virtual space of video games and the physical spaces of protest. The recent movements elucidate the importance of spatial understanding, whether ... [more ▼]

This article proposes an analysis of the links between the virtual space of video games and the physical spaces of protest. The recent movements elucidate the importance of spatial understanding, whether by the protesters or the police to occupy or control a contested space. Recently and in response to the mass protests, many game makers and activists have developed video games to support protesters in their quest for justice. This research argues that gamespace can offer for social movements a way to actualise their collective conscious and to act as a tool of spatial literacy. Therefore, this research poses two questions: Does the existing library contain games that put into consideration the role space plays in protests? Moreover, are the game makers aware of the spatial dimension when building their games? To answer the research questions, we start by defining spatial literacy as the level of spatial awareness and spatial engagement that a game can comprise. Using three analytical lenses: Representation, spatiality, and pedagogy, this research studies three cases that engage with gameplay, protest, and the city. The Three cases are 1979 Revolution: Black Friday (2016), OccupyGezi (2013) et Riot: Civil Unrest (2019). The research concluded that games makers were partially aware of the spatial dimension of a protest, but they failed to interweave the constructed spaces with the game narrative and to engage players in the game space, and consequently, the presented games fall short in acting as a tool for spatial literacy. Although the present cases mostly neglected the spatial dimension, this research still believe in the potential of the gamespace to act as a tool of spatial literacy; thus, we propose the integration of geospatial technologies in the construction of gamespaces in the hope that they can serve as a spatial literacy tool for protesters. [less ▲]

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See detailMethodology for 3D acquisition of highly reflective goldsmithing artefacts
Hallot, Pierre ULiege; Gil, Marc

in International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2019, December)

Abstract. The goldsmithing pieces conserved in museums are fragile objects whose accessibility for both research and mediation purposes lacks dematerialized systems for the safe handling of objects. The ... [more ▼]

Abstract. The goldsmithing pieces conserved in museums are fragile objects whose accessibility for both research and mediation purposes lacks dematerialized systems for the safe handling of objects. The research presented is part of the e-thesaurus project whose main objective is to improve the accessibility of masterpieces of goldsmithing - produced during the medieval period in the northern regions of France and today’s Belgium - both for research and mediation purposes. The methodology for 3D acquisition of objects with high levels of details and reflective properties must be further developed and affirmed in order provide controlled datasets that are suitable for researchers of the field and accurate for mediation application. The proposed project is the result of a collaboration between the IRHiS UMR CNRS of the University of Lille and the University of Liège. The proposed methodology leads to the 3D reconstruction of masterpieces of goldsmithing. The models developed serve as a basis for a mediation through holographic representation. They recently participated in an exhibition in the Treasure of the Cathedral of Liège museum. [less ▲]

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See detailDIGITAL TWIN: A HBIM-BASED METHODOLOGY TO SUPPORT PREVENTIVE CONSERVATION OF HISTORIC ASSETS THROUGH HERITAGE SIGNIFICANCE AWARENESS
Jouan, Pierre-André ULiege; Hallot, Pierre ULiege

in International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2019), XLII-2(2019), 609-615

Historic Building Information Modeling (HBIM), Digital Twin (DT), Heritage documentation, preventive conservation. Abstract. During preliminary phases of conservation projects, a considerable amount of ... [more ▼]

Historic Building Information Modeling (HBIM), Digital Twin (DT), Heritage documentation, preventive conservation. Abstract. During preliminary phases of conservation projects, a considerable amount of heterogeneous datasets are produced, gathered, analysed and interpreted. Abundant researches have gradually proven that Historic Building Information Modelling (HBIM) is a relevant alternative for the collaborative management of information related to existing structures. Apart from the obvious benefits of HBIM for information exchange among stakeholders during conservation project, the potential of such processes to support preservation strategies should not be neglected. Moreover, the recent developments of HBIM web-interfaces illustrate the need for additional investigation in strengthening the relationships between the digital model and the real-world to better support preventive conservation of heritage places. Besides, values-based approaches for the elaboration of conservation strategies have been gradually adopted in the last decades, both in academic and professional sector. In this paper, we propose a comprehensive methodology to structure and integrate the cultural significance of tangible and intangible elements into HBIM models to be further taken into account in the analysis and simulation of data. This article suggests the application of Digital Twin (DT) principles to support site managers in the preventive conservation of their assets. Based on the analysis and simulations of data captured by onsite sensors, threats to the site integrity and corresponding preventive solution can be predicted in the DT environment. The integration and structuration of Heritage Values in HBIM models allow further evaluation process to estimate the impact of each suggested interventions on the conservation of features of significance. [less ▲]

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See detailA Semantic Retrieval System for Remote Sensing Web Platforms
Nys, Gilles-Antoine ULiege; Kasprzyk, Jean-Paul ULiege; Hallot, Pierre ULiege et al

Conference (2019, June 13)

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See detailA Semantic Retrieval System for Remote Sensing Web Platforms
Nys, Gilles-Antoine ULiege; Kasprzyk, Jean-Paul ULiege; Hallot, Pierre ULiege et al

in International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2019, June 05), XLII-2(W13), 1593-1599

This paper proposes a solution to reduce the semantic gap between final users and data/processing providers in a web market place dedicated to remote sensing products. Nowadays, search engine are common ... [more ▼]

This paper proposes a solution to reduce the semantic gap between final users and data/processing providers in a web market place dedicated to remote sensing products. Nowadays, search engine are common tools on the Internet. Users are accustomed to use them and used to get tabular classification of provided answers. These smart agents are set up to answer basic questions using automatic pages redirection or chitchat. In this research, to ensure coherence between user’s requests and platform answers, natural language processing algorithms and knowledge graphs are integrated within a web platform thanks to a NoSQL graph database connected to open thesauri and Geographic Information Systems (GIS). Therefore, the most pertinent services can be proposed based on input sentences including non-technical vocabulary but also geographical components (the user interface includes a text area and an interactive map). While processing chains and remote sensing ontologies were presented in one of our previous studies, this article focuses on natural languages algorithms and knowledge mining. [less ▲]

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See detailProjet SCIARPA, Formation initiale des architectes, Aide à la réussite Bloc 1, 1er cycle
Seijkens, Nicolas ULiege; Scheffers, Patricia ULiege; Hallot, Pierre ULiege

Report (2019)

L’objectif poursuivi par la faculté d’architecture n’est pas la réussite pour tous les apprenants à tout prix, mais plutôt de permettre : • A chaque apprenant de bénéficier des outils mis à sa disposition ... [more ▼]

L’objectif poursuivi par la faculté d’architecture n’est pas la réussite pour tous les apprenants à tout prix, mais plutôt de permettre : • A chaque apprenant de bénéficier des outils mis à sa disposition pour réussir, quels que soient sa situation et ses besoins spécifiques, tout en développant savoirs et compétences ; • Aux encadrants de maintenir le niveau d’exigences en étant partenaires de l’apprenant : trouver l’équilibre entre accompagnement et autonomisation. Le contenu du présent rapport de travail propose de s’adresser à l’apprenant en veillant particulièrement : 1. PRÉVENIR : à l’informer afin qu’il puisse choisir et s’engager en connaissance de cause ; 2. ENSEIGNER : à le placer au centre d’une formation lui donnant accès à toutes les ressources utiles au développement de ses compétences ; 3. DIFFÉRENCIER : à lui fournir un accompagnement personnalisé dans une institution humanisée. La question sous-jacente à la réussite de la 1re année du 1er cycle en formation initiale des architectes est la durée optimale des cycles d’apprentissage tant du point de vue des cours théoriques et/ou pratiques, organisés sur un quadrimestre, qu’en ce qui concerne le cours de projet d’architecture, organisé sur l’année par dérogation au Décret dit « Paysage ». [less ▲]

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See detailTerraMosana, l’évolution de notre territoire racontée en 3D
Hallot, Pierre ULiege; Van Ruymbeke, Muriel ULiege; Billen, Roland ULiege

Conference (2019, April 23)

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See detaile.thesaurus - l’orfèvrerie à l’épreuve de la modélisation numérique
Hallot, Pierre ULiege; Gil, Marc

Conference (2019, April 23)

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See detailEXPLOITING 3D MULTISPECTRAL TEXTURE FOR A BETTER FEATURE IDENTIFICATION FOR CULTURAL HERITAGE
Mathys, Aurore ULiege; Jadinon, R; Hallot, Pierre ULiege

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2019), IV-2(W6), 91-97

3D photogrammetric reconstruction and spectral imaging have already proven useful and are being used on a daily basis for studying cultural heritage. Dense Image Matching allows to create a virtual ... [more ▼]

3D photogrammetric reconstruction and spectral imaging have already proven useful and are being used on a daily basis for studying cultural heritage. Dense Image Matching allows to create a virtual replica of the object that can be used for morphometric studies, for monitoring and conservation purposes, virtual access, reduced handling of fragile objects and share objects with a broad audience. 2D spectral imaging is used in the field of cultural heritage conservation to analyse the condition of an object, map a previous restoration, detect a change in composition, reveal sub-drawings, improve details, etc. A 2D image representation of a three-dimensional object is a limited field of view and lead frequently to a lack of information, especially for artifacts with complex geometries. The combination of both techniques is the next step toward a more complete and more objective record of an object, but it can also be a tool to improve the identification of details presents on artifacts. This study focuses on a methodology aiming to combine photogrammetry and spectral imagery acquired from a modified DSLR camera. Two case studies acquired with multispectral reconstruction techniques are analysed. They are used to demonstrate the advantages and disadvantages of the developed methodology. The obtained results show that spectral imaging reconstruction is highly related to used wavelengths. Infrared and ultraviolet fluorescence can enhance features identification of the objects that are not or less visible in classic white light photogrammetry. Combining 3D reconstruction and multispectral imagery can facilitate the readings and the understanding of the object. It can help conservator and researchers to better understand the objects and how to preserve them. [less ▲]

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See detailClassification of Multispectral Point Clouds applied to Archaeological Material
Mathys, Aurore ULiege; Hallot, Pierre ULiege

Conference (2018, December 10)

Over the past few years, the spectral classification gained major interest in the field of teledetection, urban landscape and some cultural heritage application in order to detect non straight visible ... [more ▼]

Over the past few years, the spectral classification gained major interest in the field of teledetection, urban landscape and some cultural heritage application in order to detect non straight visible features. On the other hand, 3D acquisition lead to the gathering of high resolution point clouds describing the geometric object’s features. Both approaches are rarely combined in the archaeological domain despite the fact that an increasing number of museums are digitizing their collection in 3D and perform two dimension multispectral analysis in conservation, analysis and restoration purposes. In this study, we propose to attach multispectral information to a point cloud representing archaeological objects. A multivalued classification can then be performed to the cloud. The approach shows two major interest: first, the three spatial dimensions of the point cloud can be considered in order to improve the classification; secondly, since the classification results are known in 3D, the classes can be easily represented in 3D which is a major issue for archaeological results interpretation. The artefacts digitization goes through a photogrammetric process. We produced objects images in multiple wavelengths ranging from ultraviolet, visible to near-infrared spectrum. From the 3D textured mesh (one per wavelength), we applied a data fusion to generate a unique point cloud containing the multispectral information as scalar fields. We tested several unsupervised and supervised classification processes dedicated to multispectral information or not of the point clouds such as K-means, Random Forests… The classification results allows to segment the point cloud and highlight the discovered parts of the artefact. Based on the training classification set, researchers can enhance the different features of an object (pigments, composite objects, restorations). The segmented data allow automatic surface repartition measurements and a better understanding of the creation process. [less ▲]

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See detailOverview of some heritage documentation related research and projects
Hallot, Pierre ULiege

Scientific conference (2018, October 17)

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See detaile-thesaurus – Données liées à un modèle 3D de pièces d’orfèvrerie – modélisation sémantique et défintion des besoins.
Hallot, Pierre ULiege; Gil, Marc

Conference (2018, October 11)

De nos jours, il existe une multitude de bases de données visant au référencement, au classement et à une meilleure accessibilité de sources historiques, archéologiques ou d’histoire de l’art. Certaines ... [more ▼]

De nos jours, il existe une multitude de bases de données visant au référencement, au classement et à une meilleure accessibilité de sources historiques, archéologiques ou d’histoire de l’art. Certaines d’entre elles concernent déjà les pièces d’orfèvreries. Cependant, la plupart des systèmes de documentation actuels visent à fournir une notice descriptive agrémentée de clichés photographiques des éléments décrits. Dans le cadre du projet e.thesaurus, nous proposons de partir d’une modélisation numérique tridimensionnelle des objets à documenter comme base de documentation. Les informations thématiques qui seront ensuite collectées, seront attachées – ou géoréférencées – à partir du modèle 3D construit. Ce nouveau mode de fonctionnement devrait permettre une meilleure compréhension des techniques d’assemblage, des techniques de fabrication des objets et de leurs matériaux. Par ailleurs, les informations recueillies, via une consultation en ligne, permettront de mieux faire connaître au grand public les œuvres ainsi répertoriées et analysées. Dans la durée des deux ans du programme de recherche, l’objectif n’est pas de référencer l’ensemble des pièces d’orfèvrerie septentrionale déjà repérées, aussi avons-nous sélectionné trois pièces uniques et exemplaires des difficultés techniques rencontrées, sur lesquelles tester la méthodologie proposée. La première œuvre sur laquelle nous avons commencé à opérer avant l’obtention du soutien de la Région des Hauts-de-France, est le Reliquaire de Charles le Téméraire conservé au musée du Trésor de la Cathédrale de Liège, les deux autres appartiennent aux collections du musée de l’Hôtel Sandelin à Saint-Omer : le Pied de croix de l’abbaye Saint-Bertin (v. 1170-1180) et la croix-reliquaire de la Vraie Croix, provenant de l’abbaye de Clairmarais (v. 1210-1220). Au-delà de la nécessité de concevoir une base de donnée permettant la manipulation d’objets 3D, le projet a pour objectif de réussir une modélisation d’objets présentant des particularités physiques telles une grande réflectance et des détails très fins. Des premiers résultats de la modélisation seront proposés pour le Pied de croix et la Croix de Clairmarais. Nous présenterons ici les spécifications fonctionnelles définies tant pour l’acquisition des données que pour la modélisation de l’information attributaire qui sera attachée au modèle 3D. La structuration des données sémantiques liées au modèle sera pensée de façon à être interopérable avec d’autres systèmes notamment via l’utilisation de l’ontologie CIDOC-CRMgeo. [less ▲]

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