References of "Hallot, Pierre"
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See detailThe Potential of Digital Tools and Technologies in Architectural Heritage Research for an Inclusive Approach to Built Heritage
Eisazadeh, Negin ULiege; Houbart, Claudine ULiege; Hallot, Pierre ULiege et al

Conference (in press)

In recent years, inclusive design (a.k.a. universal design or design for all) is one of the developed approaches which aim to consider the diverse human abilities and conditions in the design process. As ... [more ▼]

In recent years, inclusive design (a.k.a. universal design or design for all) is one of the developed approaches which aim to consider the diverse human abilities and conditions in the design process. As defined by the European Institute for Design and Disability (EIDD) ‘design for all’ is designing for diversity, social inclusion and equality. Considering the social and demographic changes in the 21st century, which include an international movement towards social inclusion and more specifically the rights of disabled people, an inclusive approach is turning into a necessity for today’s diverse and ageing society. In the case of architectural and urban heritage, the disabled people or in better words those with diverse sensory, mental or mobility abilities who differ from the general public, have the right to experience, interact with, and engage with heritage and its values. As part of an extensive interdisciplinary research on inclusive approaches to built heritage values, which connects the fields of architecture, history, conservation, inclusive design, and digital humanities, this paper investigates the potentials of incorporating digital tools and techniques in the different aspects of this research. The extensive study involves communication between researchers, relevant professional experts, and the historic built environment with the target community of disabled people and in this paper, the digital means to facilitate these interactions have been studied. As a step towards answering the question ‘what are suitable methods and tools for facilitating and acquiring insight into diversely abled people’s engagement with and understanding of architectural heritage and its values?’, it more specifically focuses on the interaction of the disabled people with the historic architecture and urban spaces. Additionally, in a more general approach, by linking the fields of digital humanities and architectural research, the existing tools for the different stages of research ranging from data collection and storage, data analysis, and dissemination are explored. By conducting and elaborating relevant research examples, this study shows how incorporating digital tools and techniques derived from Digital Humanities - such as retrieving data through APIs, textual analysis, creating and querying databases, and data visualization - can facilitate research in the field of architecture and built heritage. Moreover, in studying the relation between disability and the historic built environment, it indicates that acquiring knowledge on the potentials in practical digital tools for disabled people’s interaction with the built heritage, can have a significant impact on the research approach and findings. As for an inclusive approach to built heritage, the disabled people can be taken into account with their prospective extended digital abilities. Hence in today’s digital world, integrating the digital tools and technologies in architectural heritage research is not only a necessary practical mean for conducting research, but can also impact the theoretical approach, allowing to carry out extensive and innovative research in an efficient manner. [less ▲]

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See detailCASTLE4D : The Castle of Franchimont (Theux, Province of Liège, Belgium)
Luczfalvy Jancsó, Andrea ULiege; Hoffsummer, Patrick ULiege; Billen, Roland ULiege et al

in Château Gaillard : études de castellologie médiévale, 28. Château et frontière : actes du colloque international de Roscommon, Irlande, 14-18 août 2016 (in press)

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See detailBig Data and Geomatics - Towards a new paradigm in spatial information management
Kasprzyk, Jean-Paul ULiege; Hallot, Pierre ULiege

Conference (2017, November 17)

Big Data and Geomatics : towards a new paradigm in spatial information management During the last decade, the technological advances allowed a massive acquisition of digital data whose volume grows ... [more ▼]

Big Data and Geomatics : towards a new paradigm in spatial information management During the last decade, the technological advances allowed a massive acquisition of digital data whose volume grows exponentially. Going from location-based social networks to smartphones, users produce huge amounts of data that are located in space and time. The various exploitations of these large and heterogeneous datasets have created a new field called “Big Data”. As most of these data are characterized by spatial and temporal components, it has become the next challenge to handle for geomatics researchers within the next incoming year. In this presentation, we provide an overview of the main domains in geomatics that are impacted by big data. Related fields are among other things: terrestrial spatial data acquisition where the rise of powerful laser scanners, that can acquire millions of points per second in order to precisely represent built heritage in 3D, revolutionized topography; Global Navigation Satellite Systems (GNSS), powered by the European constellation Galileo, imply original researches able to increase the position accuracy of a simple smartphone user; remote sensing is now enriched by a wide open access capability thanks to Copernicus satellites which provide timely information for the management of the environment. In order to effectively manage and analyse information related to each of these revolutions, Geographical Information System (GIS) research uses innovative data storage strategies based on CityGML for 3D data, semantic web linked-data and non-structured databases (NoSQL) for the integration of heterogeneous information, data warehouses and OnLine Analytical Processing (OLAP) for decision support. The presentation is based on concrete applications about smart cities, remote sensing, firefighting… [less ▲]

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See detailTOWARDS A DECISION SUPPORT TOOL FOR 3D VISUALISATION: APPLICATION TO SELECTIVITY PURPOSE OF SINGLE OBJECT IN A 3D CITY SCENE
Neuville, Romain ULiege; Pouliot, Jacynthe; Poux, Florent ULiege et al

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, October 26), IV-4/W5

This paper deals with the establishment of a comprehensive methodological framework that defines 3D visualisation rules and its application in a decision support tool. Whilst the use of 3D models grows in ... [more ▼]

This paper deals with the establishment of a comprehensive methodological framework that defines 3D visualisation rules and its application in a decision support tool. Whilst the use of 3D models grows in many application fields, their visualisation remains challenging from the point of view of mapping and rendering aspects to be applied to suitability support the decision making process. Indeed, there exists a great number of 3D visualisation techniques but as far as we know, a decision support tool that facilitates the production of an efficient 3D visualisation is still missing. This is why a comprehensive methodological framework is proposed in order to build decision tables for specific data, tasks and contexts. Based on the second-order logic formalism, we define a set of functions and propositions among and between two collections of entities: on one hand static retinal variables (hue, size, shape…) and 3D environment parameters (directional lighting, shadow, haze…) and on the other hand their effect(s) regarding specific visual tasks. It enables to define 3D visualisation rules according to four categories: consequence, compatibility, potential incompatibility and incompatibility. In this paper, the application of the methodological framework is demonstrated for an urban visualisation at high density considering a specific set of entities. On the basis of our analysis and the results of many studies conducted in the 3D semiotics, which refers to the study of symbols and how they relay information, the truth values of propositions are determined. 3D visualisation rules are then extracted for the considered context and set of entities and are presented into a decision table with a colour coding. Finally, the decision table is implemented into a plugin developed with three.js, a cross-browser JavaScript library. The plugin consists of a sidebar and warning windows that help the designer in the use of a set of static retinal variables and 3D environment parameters. [less ▲]

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See detailMODEL FOR REASONING FROM SEMANTICALLY RICH POINT CLOUD DATA
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, October 26), IV-4/W5

This paper proposes an interoperable model for managing high dimensional point clouds while integrating semantics. Point clouds from sensors are a direct source of information physically describing a 3D ... [more ▼]

This paper proposes an interoperable model for managing high dimensional point clouds while integrating semantics. Point clouds from sensors are a direct source of information physically describing a 3D state of the recorded environment. As such, they are an exhaustive representation of the real world at every scale: 3D reality-based spatial data. Their generation is increasingly fast but processing routines and data models lack of knowledge to reason from information extraction rather than interpretation. The enhanced smart point cloud developed model allows to bring intelligence to point clouds via 3 connected meta-models while linking available knowledge and classification procedures that permits semantic injection. Interoperability drives the model adaptation to potentially many applications through specialized domain ontologies. A first prototype is implemented in Python and PostgreSQL database and allows to combine semantic and spatial concepts for basic hybrid queries on different point clouds. [less ▲]

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See detailLiDAR aérien et autres nuages de points pour la cartographie multi-échelles
Poux, Florent ULiege; Neuville, Romain ULiege; Kasprzyk, Jean-Paul ULiege et al

Conference (2017, September 12)

Utilisation de nuage de points pour la cartographie 3D multi-échelles. Exemples d'utilisation et définition de workflows pour assurer l'interopérabilité lors de la fusion de données issues de différents ... [more ▼]

Utilisation de nuage de points pour la cartographie 3D multi-échelles. Exemples d'utilisation et définition de workflows pour assurer l'interopérabilité lors de la fusion de données issues de différents capteurs. [less ▲]

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See detailConsidering Rich Spatiotemporal Relationships in Cultural Heritage Information Management
Hallot, Pierre ULiege

in Lecture Notes in Geoinformation and Cartography (2017)

This paper describes the use of rich spatiotemporal relationships in cultural heritage information modelling in order to increase the information organization and extraction. The idea is to tailor the ... [more ▼]

This paper describes the use of rich spatiotemporal relationships in cultural heritage information modelling in order to increase the information organization and extraction. The idea is to tailor the spatiotemporal state of identity model, i.e. a model based on spatiotemporal identity that takes into account relationships between non-existing and non-presents objects, to the management cultural heritage information. In doing so, we propose an enhancement of the knowledge representation for cultural heritage. [less ▲]

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See detailMultiple Uses of a 3D Point Cloud: the Castle of Franchimont (Province of Liège, Belgium)
Luczfalvy Jancsó, Andrea ULiege; Jonlet, Benoît ULiege; Hallot, Pierre ULiege et al

Poster (2017, August 29)

This poster presents the identified obstacles, needs and selected solution for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the ... [more ▼]

This poster presents the identified obstacles, needs and selected solution for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the requirements from all the disciplines at work as well as the problems that would have to be tackled, the creation of a 3D point cloud was decided. This solution would be able to deal with the characteristics and needs of a research involving building archaeology and related fields. The decision was made in order to manage all of the available data and to provide a common working tool for every involved cultural heritage actor. [less ▲]

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See detailEnhancing CIDOC - CRM and compatible models with the concept of multiple interpretation
Van Ruymbeke, Muriel ULiege; Hallot, Pierre ULiege; Billen, Roland ULiege

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, August 17), Volume IV-2/W2

Modelling cultural heritage and archaeological objects is used as much for management as for research purposes. To ensure the sustainable benefit of digital data, models benefit from taking the data ... [more ▼]

Modelling cultural heritage and archaeological objects is used as much for management as for research purposes. To ensure the sustainable benefit of digital data, models benefit from taking the data specificities of historical and archaeological domains into account. Starting from a conceptual model tailored to storing these specificities, we present, in this paper, an extended mapping to CIDOC-CRM and its compatible models. Offering an ideal framework to structure and highlight the best modelling practices, these ontologies are essentially dedicated to storing semantic data which provides information about cultural heritage objects. Based on this standard, our proposal focuses on multiple interpretation and sequential reality. [less ▲]

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See detailPOINT CLOUD CLASSIFICATION OF TESSERAE FROM TERRESTRIAL LASER DATA COMBINED WITH DENSE IMAGE MATCHING FOR ARCHAEOLOGICAL INFORMATION EXTRACTION
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences (2017, August 16), IV-2/W2

Reasoning from information extraction given by point cloud data mining allows contextual adaptation and fast decision making. However, to achieve this perceptive level, a point cloud must be semantically ... [more ▼]

Reasoning from information extraction given by point cloud data mining allows contextual adaptation and fast decision making. However, to achieve this perceptive level, a point cloud must be semantically rich, retaining relevant information for the end user. This paper presents an automatic knowledge-based method for pre-processing multi-sensory data and classifying a hybrid point cloud from both terrestrial laser scanning and dense image matching. Using 18 features including sensor’s biased data, each tessera in the high-density point cloud from the 3D captured complex mosaics of Germigny-des-prés (France) is segmented via a colour multi-scale abstraction-based featuring extracting connectivity. A 2D surface and outline polygon of each tessera is generated by a RANSAC plane extraction and convex hull fitting. Knowledge is then used to classify every tesserae based on their size, surface, shape, material properties and their neighbour’s class. The detection and semantic enrichment method shows promising results of 94% correct semantization, a first step toward the creation of an archaeological smart point cloud. [less ▲]

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See detailDIGITAL INVESTIGATIONS OF AN ARCHAEOLOGICAL SMART POINT CLOUD: A REAL TIME WEB-BASED PLATFORM TO MANAGE THE VISUALISATION OF SEMANTICAL QUERIES
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in Conservation of Cultural Heritage in the Digital Era (2017, May 16)

While virtual copies of the real world tend to be created faster than ever through point clouds and derivatives, their working proficiency by all professionals’ demands adapted tools to facilitate ... [more ▼]

While virtual copies of the real world tend to be created faster than ever through point clouds and derivatives, their working proficiency by all professionals’ demands adapted tools to facilitate knowledge dissemination. Digital investigations are changing the way cultural heritage researchers, archaeologists, and curators work and collaborate to progressively aggregate expertise through one common platform. In this paper, we present a web application in a WebGL framework accessible on any HTML5-compatible browser. It allows real time point cloud exploration of the mosaics in the Oratory of Germigny-des-Prés, and emphasises the ease of use as well as performances. Our reasoning engine is constructed over a semantically rich point cloud data structure, where metadata has been injected a priori. We developed a tool that directly allows semantic extraction and visualisation of pertinent information for the end users. It leads to efficient communication between actors by proposing optimal 3D viewpoints as a basis on which interactions can grow. [less ▲]

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See detailMultiple Uses of a 3D Point Cloud: the Castle of Franchimont (Province of Liège, Belgium)
Luczfalvy Jancsó, Andrea ULiege; Jonlet, Benoît ULiege; Hallot, Pierre ULiege et al

in Hayes, James; Ouimet, Christian; Santana Quintero, Mario (Eds.) et al ISPRS - The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 26th International CIPA Symposium – Digital Workflows for Heritage Conservation (2017)

This paper presents the identified obstacles, needs and selected solutions for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the ... [more ▼]

This paper presents the identified obstacles, needs and selected solutions for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the requirements from all the disciplines at work as well as the problems that would have to be tackled, the creation of a 3D point cloud was decided. This solution would be able to deal with the characteristics and needs of a research involving building archaeology and related fields. The decision was made in order to manage all of the available data and to provide a common working tool for every involved cultural heritage actor. To achieve this, the elaboration of an Archaeological Information System based on 3D point clouds as a common virtual workspace is being taken into consideration. [less ▲]

Detailed reference viewed: 36 (4 ULiège)
See detailVers une société géolocalisée
Hallot, Pierre ULiege

Scientific conference (2016, December 14)

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement ... [more ▼]

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement, il est possible de se géolocaliser à n’importe quel endroit du globe. Connaître sa position à l’intérieur d'un bâtiment, d'un centre commercial, voire au sein même d’un rayonnage n’est plus une utopie. Cette disponibilité de géolocalisation conduit, d’une part, à des changements importants dans la manière d’appréhender l’espace et, d’autre part, à la création de nouveaux services basés sur la connaissance de sa position en temps réel. Au cours de cette conférence, nous aborderons les principes et systèmes permettant de collecter et de traiter cette information de position acquise en temps réel. Nous verrons ensuite quelques exemples d’utilisations de cette masse d’informations collectées, notamment via l’utilisation de réseaux sociaux. L’exposé proposera volontairement une vision pragmatique de la question de la géolocalisation de la société sans se positionner, a priori, sur ses bienfaits ou ses dérives. [less ▲]

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See detailPoint Clouds as an Efficient Multiscale Layered Spatial Representation
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in Tourre, Vincent; Biljecki, Filip (Eds.) UDMV16: Eurographics Workshop on Urban Data Modelling and Visualisation (2016, December 08)

3D point clouds describe urban shape at different scales, precisions and resolutions depending on the underlying sensors and acquisition methodology. These factors influence the quality of the data, as ... [more ▼]

3D point clouds describe urban shape at different scales, precisions and resolutions depending on the underlying sensors and acquisition methodology. These factors influence the quality of the data, as well as its representativity. In this paper, we propose a multi-scale workflow to obtain a better description of the captured environment through a multi-scale representative point cloud, presenting an unlimited depth and multisensory data fusion. Our method is shown over a ''smart point cloud'' data structure and based on data fusion principles retaining higher description and precision on overlapping areas. The concept is illustrated through a use case on the castle of Jehay (Belgium), where aerial LiDAR data, terrestrial laser scanner point cloud and photogrammetrybased reconstruction are combined to obtain a multi-scale data structure. [less ▲]

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See detailVers une société géolocalisée
Hallot, Pierre ULiege

Scientific conference (2016, October 10)

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement ... [more ▼]

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement, il est possible de se géolocaliser à n’importe quel endroit du globe. Connaître sa position à l’intérieur d'un bâtiment, d'un centre commercial, voir au sein même d’un rayonnage n’est plus une utopie. Cette disponibilité de géolocalisation conduit d’une part à des changements importants dans la manière d’appréhender l’espace, et d’autre part, à la création de nouveaux services basé sur la connaissance de sa position en temps réel. A cours de cette conférence, nous aborderons les principes et systèmes permettant de collecter et de traiter cette information de position acquise en temps réel. Nous verrons ensuite quelques exemples d’utilisations de cette masse d’information collectée, notamment via l’utilisation de réseaux sociaux. L’exposé proposera volontairement une vision pragmatique de la question de la géolocalisation de la société sans se positionner, a priori, sur ses bienfaits ou ses dérives. [less ▲]

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See detailSMART POINT CLOUD: DEFINITION AND REMAINING CHALLENGES
Poux, Florent ULiege; Neuville, Romain ULiege; Hallot, Pierre ULiege et al

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2016, October 05), IV-2(W1), 119-127

Dealing with coloured point cloud acquired from terrestrial laser scanner, this paper identifies remaining challenges for a new data structure: the smart point cloud. This concept arises with the ... [more ▼]

Dealing with coloured point cloud acquired from terrestrial laser scanner, this paper identifies remaining challenges for a new data structure: the smart point cloud. This concept arises with the statement that massive and discretized spatial information from active remote sensing technology is often underused due to data mining limitations. The generalisation of point cloud data associated with the heterogeneity and temporality of such datasets is the main issue regarding structure, segmentation, classification, and interaction for an immediate understanding. We propose to use both point cloud properties and human knowledge through machine learning to rapidly extract pertinent information, using user-centered information (smart data) rather than raw data. A review of feature detection, machine learning frameworks and database systems indexed both for mining queries and data visualisation is studied. Based on existing approaches, we propose a new 3-block flexible framework around device expertise, analytic expertise and domain base reflexion. This contribution serves as the first step for the realisation of a comprehensive smart point cloud data structure [less ▲]

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See detailTowards a normalised 3D Geovisualisation : the viewpoint management
Neuville, Romain ULiege; Poux, Florent ULiege; Hallot, Pierre ULiege et al

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2016, October 05), IV-2(W1), 179-186

This paper deals with the viewpoint management in 3D environments considering an allocentric environment. The recent advances in computer sciences and the growing number of affordable remote sensors lead ... [more ▼]

This paper deals with the viewpoint management in 3D environments considering an allocentric environment. The recent advances in computer sciences and the growing number of affordable remote sensors lead to impressive improvements in the 3D visualisation. Despite some research relating to the analysis of visual variables used in 3D environments, we notice that it lacks a real standardisation of 3D representation rules. In this paper we study the “viewpoint” as being the first considered parameter for a normalised visualisation of 3D data. Unlike in a 2D environment, the viewing direction is not only fixed in a top down direction in 3D. A non-optimal camera location means a poor 3D representation in terms of relayed information. Based on this statement we propose a model based on the analysis of the computational display pixels that determines a viewpoint maximising the relayed information according to one kind of query. We developed an OpenGL prototype working on screen pixels that allows to determine the optimal camera location based on a screen pixels colour algorithm. The viewpoint management constitutes a first step towards a normalised 3D geovisualisation. [less ▲]

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See detailApplications des relevés 3D au patrimoine, de l'acquisition au système d'information 3D
Hallot, Pierre ULiege; Billen, Roland ULiege; Poux, Florent ULiege et al

Conference (2016, September 23)

Les techniques permettant l’acquisition 3D du patrimoine bâti sont maintenant assez mures et démocratiques pour être utilisées à grande échelle. De plus en plus d’édifices font l’objet d’une sauvegarde ... [more ▼]

Les techniques permettant l’acquisition 3D du patrimoine bâti sont maintenant assez mures et démocratiques pour être utilisées à grande échelle. De plus en plus d’édifices font l’objet d’une sauvegarde numérique sous la forme de nuages de points colorés. Il reste néanmoins de nombreux défis à relever notamment pour : harmoniser les pratiques d’acquisition en terme de qualité et de précision, assurer l’interopérabilité entre les jeux de données ; exploiter pleinement l’information ponctuelle collectée ; et proposer une visualisation adéquate de ces grands jeux de données. Dans le cadre des développements réalisés à l’Unité de Géomatique de l’ULg, nous travaillons à la mise au point de systèmes d’informations permettant d’assurer un lien entre les informations sémantiques issues des applications archéologiques, architecturales, d’histoire de l’art avec les modèles 3D réalisés. La mise en place de ces systèmes d’informations passe par plusieurs étapes de recherche relatives à la sectorisation automatique, les structures de données, la définitions d’ontologies thématiques et finalement les règles sémiologiques de représentations dans un environnement virtuel 3D. Au cours de cette présentation, nous proposons de parcourir trois projets de recherche en cours au sein de l’Unité afin l’illustrer nos propos. Nous présenterons plus particulièrement le cas de la cathédrale Saint-Paul de Liège. [less ▲]

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See detailCASTLE4D : The castle of Franchimont
Luczfalvy Jancsó, Andrea ULiege; Hoffsummer, Patrick ULiege; Billen, Roland ULiege et al

Poster (2016, August 16)

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See detailEnhancing Spatio-Temporal Identity: States of Existence and Presence
Hallot, Pierre ULiege; Billen, Roland ULiege

in International Journal of Geo-Information (2016), 5(62),

This work presents a new approach that aims to characterize the spatio-temporal relationships that exist between geographical objects that are absent or non-existent at the moment of analysis. First, we ... [more ▼]

This work presents a new approach that aims to characterize the spatio-temporal relationships that exist between geographical objects that are absent or non-existent at the moment of analysis. First, we would like to propose a formal analysis of the spatio-temporal states of presence and existence of a geographical object. We will then use a combination of these states in order to define a set of life and motion configurations. The model developed then serves as a formal basis for the realization of a series of spatio-temporal queries based on an analysis of patterns in the succession of spatio-temporal states. The entire approach is then demonstrated by using the example of the organization of a scientific conference by defining the spatio-temporal relationships between the conference participants. The research methodology is finally compared with a real dataset taken from a geolocalized social network to show the efficiency of this type of management. [less ▲]

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