2021 |
Chroni, Athina; Georgopoulos, Andreas In: pp. 78–89, Springer, Cham, 2021, ISBN: 978-3-030-73043-7. Abstract | Links | BibTeX | Tags: 3D modelling, Cultural heritage, Digitization, Documentation, G.I.S., Intangible, Ioannina, Open sources, Photogrammetry, Tangible @incollection{Chroni2021,The specific paper forms part of the Postdoctoral Research Project focusing on Ioannina city’s Ottoman period (1430-1913) and its multicultural profile as depicted in buildings, public or private, religious or secular, conventional or more elaborate, each having its own historical and architectural interest. Unfortunately, most of the landmark buildings have been destroyed due to natural disasters, religious hatred and the unbridled, often uncontrolled modern constructions. However, the existence and form of several of those edifices survived thanks to fragmentary information of various kinds, while their position in the urban web and their dimensions can be clarified, in several cases, by their comparative studies with buildings recorded at the same representations whose location and dimensions are known or buildings preserved until today. Under this perspective, a variety of data like historiographic, bibliographic, archaeological, cartographic, topographic, remote sensing imagery, optical displays, travelers’ descriptions, other literary sources, local legends, inhabitants’ interviews have been collected, analyzed, cross-examined and digitally processed, thus leading to the development of a Geographic Information System, the 3-D landmarks digital models, a web data base and QR coding at the specific sites, where the landmark buildings used to stand, thus connecting the intangible (digital) with the tangible (physical space) and achieving interaction of the project with the local community. Moreover, cultural walks within the city's urban web, related to the project’s axis are also proposed. |
Boutsi, A -M; Verykokou, S; Soile, S; Ioannidis, C Α PATTERN-BASED AUGMENTED REALITY APPLICATION FOR THE DISSEMINATION OF CULTURAL HERITAGE Journal Article In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. VIII-M-1-2021, pp. 57–63, 2021. Links | BibTeX | Tags: 3D modelling, Augmented Reality, Computer Vision, Cultural heritage, mobile app, Photogrammetry @article{isprs-annals-VIII-M-1-2021-57-2021, |
Ioannidis, Charalabos; Soile, Sofia; Boutsi, Argyro-maria; Verykokou, Styliani; Bourexis, Fotios; Potsiou, Chryssy From 3D documentation to XR representation of Cultural Heritage buildings -The case of the Katholikon of St. Stephen, Meteora Proceedings Article In: FIG e-Working Week 2021, Smart Surveyors for Land and Water Management, 2021. Abstract | Links | BibTeX | Tags: 3D modelling, AR, Cultural heritage, Photogrammetry, visualization, VR @inproceedings{Ioannidis2021,Photogrammetric surveying and 3D modelling are of immense value for the diagnosis and conservation of historic and religious buildings. In case they are coupled with eXtended Reality (XR) technologies (i.e., Virtual, Augmented and Mixed Reality), different levels of interpretation, interaction and dissemination can be achieved. This paper presents a holistic approach to the multi-representation of the restoration phases of a Byzantine church. The aim is twofold; the introduction of a low-cost photogrammetric methodology for a detailed and accurate 3D geometric documentation of CH buildings, and the development of a web-based integrated 3D platform with XR functionalities. The proposed methodology is applied to the external and internal 3D reconstruction of the 16 th century old church (Katholikon) of St. Stephen's Monastery in Meteora, Greece, at two different periods: prior and after church maintenance work and restoration innervations. Close-range photogrammetry and computer vision are used for the collection of image data and the generation of dense point clouds, surface models and texture mapping. The final 3D models along with their supported metadata are integrated into an online XR viewer for a comparative temporal analysis through an immersive experience. The viewer has the following capabilities: (i) automated virtual tour on the 3D scene, (ii) points of interest, (iii) VR navigation as well as, (iv) marker-less AR based on hand pattern recognition. The 3D rendering and progressive loading, the interactive tools as well as the various visualization modes are built upon Three.js, Tween.js and AR.js libraries. The evaluation of the developed platform regarding performance and usability demonstrates the effectiveness of VR and AR in remote access, monitoring and preservation of tangible Cultural Heritage. |
2020 |
Skamantzari, M; Georgopoulos, A; Palyvou, C Sunken Roman Villa of Ancient Epidaurus: Documentation and Enhancement Using Virtual Reality Proceedings Article In: ISPRS Ann. Photogramm. Remote Sens. Spat. Inf. Sci., pp. 981–988, Copernicus GmbH, 2020, ISSN: 21949050. Abstract | Links | BibTeX | Tags: 3D modelling, geometric documentation, SfM/MVS, Underwater Cultural Heritage, Virtual Reality @inproceedings{Skamantzari2020,The interest in the documentation and enhancement of Underwater Cultural Heritage (UCH) is rising rapidly over the last decades. This has happened especially due to the significant technological advances, which have enabled the digital data acquisition in the hostile underwater environment. Numerous efforts have been made so far concerning the 3D digitisation and promotion of the UCH using photogrammetric methods and 3D surveys in order on one hand to document the site and on the other to develop virtual and augmented reality applications and make this part of the hidden cultural heritage accessible to people with difficulties to reach it.textless/ptextgreatertextlessptextgreaterThis paper presents the methodology, the actions and decisions that were taken for the geometric documentation, study, promotion and enhancement of the remains of a roman villa located at Agios Vlassis, in Ancient Epidaurus in Greece. The present effort focuses on the use of low-cost equipment in order to acquire the necessary digital data to produce the 3D textured model of the archaeological site and the required 2D documentation products. The methods used to produce this 3D model involve contemporary computer vision algorithms adapted to confront the challenge of processing a huge number of images and extracting useful metric information from them. Moreover, the creation and programming process of two virtual reality applications is described. By developing a virtual tour and a virtual reality application, it is hoped to raise the awareness about UCH and give prominence to different means and ways of protection and management of underwater archaeological sites. |
2019 |
Gkeli, Maria; Potsiou, Chryssy; Ioannidis, Charalabos Crowdsourced 3D cadastral surveys: looking towards the next 10 years Journal Article In: Journal of Geographical Systems, vol. 21, no. 1, pp. 61-87, 2019. Abstract | Links | BibTeX | Tags: 3D cadastre, 3D modelling, Crowdsourcing, Land administration @article{Gkeli2019,Rapidly growing cities, multiple uses of urban space and the complexity of overlapping property rights require various types of rights to be registered and handled in a uniform and reliable way, considering the third dimension. The adoption of automated and low-cost but reliable procedures for cadastral surveys and for the capture and processing of cadastral data, as well as the use of modern Information Technology (IT) tools and m-services, is the beginning of a new cadastral evolution. 3D-crowdsourced cadastral data capture has huge potential and may soon facilitate the work of National Mapping Agencies (NMAs). In this paper, an innovative fit-for-purpose procedure is designed and initially tested that aims to save time and costs and to provide a modern technical solution for the initial collection, registration and visualization of 3D cadastral data. An open-source, mobile application for the acquisition of 3D crowdsourced cadastral data and 3D modelling and visualization of property units is developed, tested and presented. The proposed technical procedure is adjustable and may be used in both the developed and the developing world. The geometric accuracy of the final product depends on the geometric accuracy of the basemaps used. The developed application is tested on a multi-story building in an urban area of Larisa, in Greece. An initial evaluation of the procedure and the final product, in terms of its usability, affordability, reliability and implementation duration, is conducted. The first results are satisfactory and may lead to a fit-for-purpose procedure for a 3D cadastre for all in the future. |
2017 |
Agrafiotis, P; Lampropoulos, K; Georgopoulos, A; Moropoulou, A 3D modelling the invisible using ground penetrating radar Journal Article In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 2W3, pp. 33–37, 2017, ISSN: 16821750. Abstract | Links | BibTeX | Tags: 3D modelling, Ground penetrating radar (GPR), Holy aedicule @article{Agrafiotis2017b,An interdisciplinary team from the National Technical University of Athens is performing the restoration of the Holy Aedicule, which covers the Tomb of Christ within the Church of the Holy Sepulchre in Jerusalem. The first important task was to geometrically document the monument for the production of the necessary base material on which the structural and material prospection studies would be based. One task of this action was to assess the structural behavior of this edifice in order to support subsequent works. It was imperative that the internal composition of the construction be documented as reliably as possible. To this end several data acquisition techniques were employed, among them ground penetrating radar. Interpretation of these measurements revealed the position of the rock, remnants of the initial cave of the bunal of Christ. This paper reports on the methodology employed to construct the 3D model of the rock and introduce it into the 3D model of the whole building, thus enhancing the information about the structure. The conversion of the radargrams to horizontal sections of the rock is explained and the construction of the 3D model and its insertion into the 3D model of the Holy Aedicule is descnbed. |
Doulamis, Anastasios; Voulodimos, Athanasios; Doulamis, Nikolaos; Soile, Sofia; Lampropoulos, Anastasios Transforming Intangible Folkloric Performing Arts into Tangible Choreographic Digital Objects: The Terpsichore Approach Proceedings Article In: Proc. 12th Int. Jt. Conf. Comput. Vision, Imaging Comput. Graph. Theory Appl., pp. 451–460, SCITEPRESS - Science and Technology Publications, 2017, ISBN: 978-989-758-226-4. Abstract | Links | BibTeX | Tags: 3D modelling, Cultural heritage, Folkloric dances, Intangible Cultural Heritage, Performing arts @inproceedings{Doulamis2017,Intangible Cultural Heritage is a mainspring of cultural diversity and as such it should be a focal point in cultural heritage preservation and safeguarding endeavours. Nevertheless, although significant progress has been made in digitization technology as regards tangible cultural assets and especially in the area of 3D reconstruction, the e-documentation of intangible cultural heritage has not seen comparable progress. One of the main reasons associated lies in the significant challenges involved in the systematic e-digitisation of intangible cultural assets, such as performing arts. In this paper, we present at a high-level an approach for transforming intangible cultural assets, namely folk dances, into tangible choreographic digital objects. The approach is being implemented in the context of the H2020 European project "Terpsichore". |
2021 |
In: pp. 78–89, Springer, Cham, 2021, ISBN: 978-3-030-73043-7. |
Α PATTERN-BASED AUGMENTED REALITY APPLICATION FOR THE DISSEMINATION OF CULTURAL HERITAGE Journal Article In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. VIII-M-1-2021, pp. 57–63, 2021. |
From 3D documentation to XR representation of Cultural Heritage buildings -The case of the Katholikon of St. Stephen, Meteora Proceedings Article In: FIG e-Working Week 2021, Smart Surveyors for Land and Water Management, 2021. |
2020 |
Sunken Roman Villa of Ancient Epidaurus: Documentation and Enhancement Using Virtual Reality Proceedings Article In: ISPRS Ann. Photogramm. Remote Sens. Spat. Inf. Sci., pp. 981–988, Copernicus GmbH, 2020, ISSN: 21949050. |
2019 |
Crowdsourced 3D cadastral surveys: looking towards the next 10 years Journal Article In: Journal of Geographical Systems, vol. 21, no. 1, pp. 61-87, 2019. |
2017 |
3D modelling the invisible using ground penetrating radar Journal Article In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 2W3, pp. 33–37, 2017, ISSN: 16821750. |
Transforming Intangible Folkloric Performing Arts into Tangible Choreographic Digital Objects: The Terpsichore Approach Proceedings Article In: Proc. 12th Int. Jt. Conf. Comput. Vision, Imaging Comput. Graph. Theory Appl., pp. 451–460, SCITEPRESS - Science and Technology Publications, 2017, ISBN: 978-989-758-226-4. |