2022 |
Betsas, Thodoris; Georgopoulos, Andreas Point-Cloud Segmentation for 3D Edge Detection and Vectorization Journal Article In: Heritage, vol. 5, no. 4, pp. 4037–4060, 2022, ISSN: 2571-9408, (Number: 4 Publisher: Multidisciplinary Digital Publishing Institute). Abstract | Links | BibTeX | Tags: 3D computer vision, Cultural heritage, Edge detection, Photogrammetry, point-cloud segmentation, SfM-MVS @article{betsas_point-cloud_2022,The creation of 2D–3D architectural vector drawings constitutes a manual, labor-intensive process. The scientific community has not provided an automated approach for the production of 2D–3D architectural drawings of cultural-heritage objects yet, regardless of the undoubtable need of many scientific fields. This paper presents an automated method which addresses the problem of detecting 3D edges in point clouds by leveraging a set of RGB images and their 2D edge maps. More concretely, once the 2D edge maps have been produced exploiting manual, semi-automated or automated methods, the RGB images are enriched with an extra channel containing the edge semantic information corresponding to each RGB image. The four-channel images are fed into a Structure from Motion–Multi View Stereo (SfM-MVS) software and a semantically enriched dense point cloud is produced. Then, using the semantically enriched dense point cloud, the points belonging to a 3D edge are isolated from all the others based on their label value. The detected 3D edge points are decomposed into set of points belonging to each edge and fed into the 3D vectorization procedure. Finally, the 3D vectors are saved into a “.dxf” file. The previously described steps constitute the 3DPlan software, which is available on GitHub. The efficiency of the proposed software was evaluated on real-world data of cultural-heritage assets. |
Shabani, Amirhosein; Skamantzari, Margarita; Tapinaki, Sevasti; Georgopoulos, Andreas; Plevris, Vagelis; Kioumarsi, Mahdi 3D simulation models for developing digital twins of heritage structures: challenges and strategies Journal Article In: Procedia Structural Integrity, vol. 37, pp. 314-320, 2022, ISSN: 2452-3216, (ICSI 2021 The 4th International Conference on Structural Integrity). Abstract | Links | BibTeX | Tags: 3D geometric documentation, 3D laser scanner, Cultural heritage, Digital twins, Finite element model, Photogrammetry @article{SHABANI2022314,Structural vulnerability assessment of heritage structures is a pivotal part of a risk mitigation strategy for preserving these valuable assets for the nations. For this purpose, developing digital twins has gained much attention lately to provide an accurate digital model for performing finite element (FE) analyses. Three-dimensional (3D) geometric documentation is the first step in developing the digital twin, and various equipment and methodologies have been developed to facilitate the procedure. Both aerial and terrestrial close-range photogrammetry can be combined with 3D laser scanning and geodetic methods for the accurate 3D geometric documentation. The data processing procedure in these cases mostly focuses on developing detailed, accurate 3D models that can be used for the FE modeling. The final 3D surface or volumes are produced mainly by combining the 3D point clouds obtained from the laser scanner and the photogrammetric methods. 3D FE models can be developed based on the geometries derived from the 3D models using FE software packages. As an alternative, developed 3D volumes provided in the previous step can be directly imported to some FE software packages. In this study, the challenges and strategies of each step are investigated by providing examples of surveyed heritage structures. |
Potsiou, Chryssy; Ioannidis, Charalabos; Soile, Sofia; Verykokou, Styliani; Gkeli, Maria; Filippakopoulou, Maria A Technical Tool for Urban Upgrading: An Application for Cultural Heritage Preservation and Planning for Affordable Housing Journal Article In: Land, vol. 11, no. 8, pp. 1197, 2022, ISSN: 2073-445X. Abstract | Links | BibTeX | Tags: 3D model, Affordable housing, Cultural heritage, land policy, urban planning, valuation @article{potsiou2022technical,A technical tool to support projects for urban reforms and the implementation of current land policies is presented together with an example for its application in a project concerning the preservation of privately-owned residential buildings listed as “protected” cultural heritage (CH) constructions, urban planning and planning for affordable housing provision. The projects should be based on the voluntary participation of current property owners and an agreement signed between them and the private developer (team of professionals), so that the project will be self-financed through value capture measures to be decided by the state. The application presented here is based on the assumption that the state, by example, has set the rules for an increase in FAR in order to apply affordable housing policy and the preservation of listed CH residential private constructions. The state also provides the rules for identifying the target group of beneficiaries for affordable housing. Current property owners contribute the land, while the developer's team undertakes all project costs. New property units are shared accordingly with the developer, the current owners and the beneficiaries for affordable housing. No additional public funds for the “affordable housing” units or for expropriation of the protected CH buildings is required. |
2021 |
Tapinaki, S; Skamantzari, M; Anastasiou, A; Koutros, S; Syrokou, E; Georgopoulos, A 3D HOLISTIC DOCUMENTATION OF HERITAGE MONUMENTS IN RHODES Journal Article In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XLVI-M-1-2021, pp. 739–744, 2021. Links | BibTeX | Tags: 3D reconstruction, Cultural heritage, geometric documentation, Image based modelling, laser scanning @article{isprs-archives-XLVI-M-1-2021-739-2021, |
Kolokoussis, P; Skamantzari, M; Tapinaki, S; Karathanassi, V; Georgopoulos, A 3D AND HYPERSPECTRAL DATA INTEGRATION FOR ASSESSING MATERIAL DEGRADATION IN MEDIEVAL MASONRY HERITAGE BUILDINGS Journal Article In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XLIII-B2-2021, pp. 583–590, 2021. Links | BibTeX | Tags: 3D reconstruction, Cultural heritage, Hyperspectral Images, Material Analysis, Photogrammetry @article{isprs-archives-XLIII-B2-2021-583-2021, |
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. |
Dolapsaki, Maria Melina; Georgopoulos, Andreas Edge Detection in 3D Point Clouds Using Digital Images Journal Article In: ISPRS Int. J. Geo-Information, vol. 10, no. 4, pp. 229, 2021. Abstract | Links | BibTeX | Tags: Cultural heritage, Edge detection, large scales, Point clouds @article{Dolapsaki2021,This paper presents an effective and semi-automated method for detecting 3D edges in 3D point clouds with the help of high-resolution digital images. The effort aims to contribute towards addressing the unsolved problem of automated production of vector drawings from 3D point clouds of cultural heritage objects. Edges are the simplest primitives to detect in an unorganized point cloud and an algorithm was developed to perform this task. The provided edges are defined and measured on 2D digital images of known orientation, and the algorithm determines the plane defined by the edge on the image and its perspective center. This is accomplished by applying suitable transformations to the image coordinates of the edge points based on the Analytical Geometry relationships and properties of planes in 3D space. This plane inevitably contains the 3D points of the edge in the point cloud. The algorithm then detects and isolates those points which define the edge in the world system. Finally, the goal is to reliably locate the points that describe the desired edge in their true position in the geodetic space, using several constraints. The algorithm is firstly investigated theoretically for its efficiency using simulation data and then assessed under real conditions and under different image orientations and lengths of the edge on the image. The results are presented and evaluated. |
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 |
Ioannidis, Charalabos; Verykokou, Styliani; Soile, Sofia; Boutsi, Argyro-Maria A MULTI-PURPOSE CULTURAL HERITAGE DATA PLATFORM FOR 4D VISUALIZATION AND INTERACTIVE INFORMATION SERVICES Journal Article In: ISPRS - Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci., vol. XLIII-B4-2, no. B4, pp. 583–590, 2020, ISSN: 2194-9034. Abstract | Links | BibTeX | Tags: 4D modelling, Cultural heritage, Documentation, geospatial data, visualization @article{Ioannidis2020b,Abstract. The already arduous task of collecting, processing and managing heterogeneous cultural heritage data is getting more intense in terms of indexing, interaction and dissemination. This paper presents the creation of a 4D web-based platform as a centralized data hub, moving beyond advanced photogrammetric techniques for 3D capture and multi-dimensional documentation. Precise metric data, generated by a combination of image-based, range and surveying techniques, are spatially, logically and temporally correlated with cultural and historical resources, in order to form a critical knowledge base for multiple purposes and user types. Unlike conventional information systems, the presented platform, which adopts a relational database model, has the following front-end functionalities: (i) visualization of high-resolution 3D models based on distance dependent Level of Detail (LoD) techniques; (ii) web Augmented Reality; and (iii) interactive access and retrieval services. Information deduced from the developed services is tailored to different target audiences: scientific community, private sector, public sector and general public. The case study site is the UNESCO world heritage site of Meteora, Greece, and particularly, two inaccessible huge rocks, the rock of St. Modestos, known as Modi, and the Alyssos rock. |
Tentoma, Nefeli; Georgopoulos, Andreas; Tucci, Grazia COMPARATIVE INVESTIGATION OF THE 3D REPRESENTATIONS OF THE HOLY AEDICULE OF THE TOMB OF CHRIST Journal Article In: Arqueol. 2.0 - 9th Int. Congr. 3rd GEORES - GEOmatics Preserv., 2020. Abstract | Links | BibTeX | Tags: 3D reconstruction, Cultural heritage, digital photogrammetry, geometric documentation, online webmap, three-dimensional representations @article{Tentoma2020,The significance of preservation of cultural heritage is undeniable, which is why both their geometric documentation and the creation of their digital "twins", i.e., reconstructions and replicas at any scale, are essential procedures. A special category of cultural heritage is sacred sites which combine historical, spiritual and religious values. The most sacred monument of Christianity is the Holy Aedicule covering the Tomb of Christ in the Church of the Holy Sepulchre in Jerusalem. This paper aims to investigate and compare the various three-dimensional representations of the Holy Aedicule of the Tomb of Christ, which exist both in physical and in digital form. Initially, the main structural phases of the Aedicule are presented, including its destructions and restorations. Moreover, the different categories of the three-dimensional representations of the monument are defined. With reference to the replicas, both the reasons of their construction and their list in the form of a dataset table are presented. More specifically, in the context of this research, the three-dimensional representations of the Aedicule are divided into two major categories: the replicas constructed worldwide and the geometric documentations of the monument's condition through the years. Regarding the replicas, a list of the discovered representations is created, and this database is visualized and depicted in an online web map along with essential information with the use of an open-source Geographic Information System (GIS). Based on this visualization an online web map has been created. Furthermore, the previous geometric documentations and surveys of the Holy Aedicule of the Tomb of Christ are presented. A comparison is conducted between the 3D models of the Aedicule, which were created by the University of Florence in 2007-8 and the National Technical University of Athens in 2015-17. The impact of the Holy Aedicule across the world is examined through statistics based on the type, date of construction and location of the replicas. The possible deformations of the monument's structure are detected from the assessment of the results from both the processing and the comparison of the 3D models. In conclusion, future works are suggested focusing on the discovery of the total number of replicas worldwide and the monitoring of the condition of the Aedicule. |
Tsilimantou, Elisavet; Delegou, Ekaterini T; Nikitakos, Ioannis A; Ioannidis, Charalabos; Moropoulou, Antonia GIS and BIM as Integrated Digital Environments for Modeling and Monitoring of Historic Buildings Journal Article In: Appl. Sci., vol. 10, no. 3, pp. 1078, 2020, ISSN: 2076-3417. Abstract | Links | BibTeX | Tags: building materials, cracks, Cultural heritage, Decay, geometric documentation, GIS thematic mapping, HBIM, monitoring, multidisciplinary documentation, structural integrity @article{Tsilimantou2020,Multidisciplinary data integration within an information system is considered a key point for rehabilitation projects. Information regarding the state of preservation and/or decision making, for sustainable restoration is prerequisite. In addition, achieving structural integrity of a historic building, especially one that has undergone many construction phases and restoration interventions, is a very elaborate task and should, therefore, involve the study of multidisciplinary information regarding historical, architectural, building material and geometric data. In this paper the elaboration of such data within 2D and 3D information systems is described. Through the process described herein, a methodology, including the acquisition, classification and management of various multisensory data, is displayed and applied within a geographic information system (GIS). Moreover, the multidisciplinary documentation process, aggregated with the surveying products, generates 3D heritage building information modeling (HBIM), including information regarding construction phases, pathology and current state of preservation of a building. The assessment of the applied methodology is performed concluding in a qualitative and a quantitative manner, in both 2D and 3D environments, providing information to facilitate the structural assessment of a historic building. Thus, in this work, the described methodology is presented, combining the multidisciplinary data with the development of GIS thematic maps and an HBIM. Representative results of the suggested methodology applied on the historic building of Villa Klonaridi, Athens, Greece are displayed. |
Bakalos, Nikolaos; Soile, Sofia; Ioannidis, Charalabos Semantic Classification of Monuments' Decoration Materials Using Convolutional Neural Networks: A Case Study for Meteora Byzantine Churches Proceedings Article In: Proceedings of the 13th ACM International Conference on PErvasive Technologies Related to Assistive Environments, Association for Computing Machinery, Corfu, Greece, 2020, ISBN: 9781450377737. Abstract | Links | BibTeX | Tags: complex surfaces, Convolutional Neural Networks, Cultural heritage, material detection, semantic classification @inproceedings{10.1145/3389189.3398001,https://doi.org/10.1145/3389189.3398000 Historic preservation of tangible cultural heritage assets is a process that goes beyond structural integrity to the restoration of the interior decorations, such as wall-paintings or icons since this provides a complete restoration process of the monuments that face both their architectural and functional elements. This process is imperative, as in a lot of cases parts of the assets (e.g., frescoes) are decayed or missing due to the passage of time and other environmental, natural or anthropogenic factors. An indicative paradigm of such a decay is the Byzantine churches in Meteora area, a UNESCO cultural heritage site in Greece. However, the limitations in taking samples from such sights indicate that before such fresco restoration process commences, we first need to semantically classify the monument surfaces into different material types, such as stone, mortar or frescoes. The research challenge imposes this semantic classification process is more evident in cases where the surfaces of the monument are not planar but complex, such as in many byzantine churches carved in rock in Meteora.In this paper, the semantic classification is achieved using a deep Convolutional Neural Network (CNN) which receives as input two types of data: RGB images of the frescoes to capture textural information and 3D cubes that encapsulate the geometric structure of the surface. RGB images describe visual complexity of the frescoes including texture maps and style. On the other hand, the 3D cubes include triangles of the surface, obtained using photogrammetric methods, describing surface complexity. The CNN consist of two layers; a deep convolutional layer which automatically extracts a set of reliable features from the input raw data and a conventional feedforward neural-based classification layer. To detect the missing items and the material types, overlapped input data are fed as inputs to the CNN as if the network "scan" the decorations to discriminate the type of their materials. The classification performance is tested on real-world destroyed byzantine frescoes of Saint Stephanus Monastery in Meteora. |
2019 |
Boutsi, Argyro-Maria; Ioannidis, Charalabos; Soile, Sofia An Integrated Approach to 3D Web Visualization of Cultural Heritage Heterogeneous Datasets Journal Article In: Remote Sens., vol. 11, no. 21, pp. 2508, 2019, ISSN: 2072-4292. Abstract | Links | BibTeX | Tags: 'structure from motion photogrammetry, 3D visualization, Cultural heritage, Data retrieval, Interactivity, Remote sensing archaeology @article{Boutsi2019,The evolution of the high-quality 3D archaeological representations from niche products to integrated online media has not yet been completed. Digital archives of the field often lack multimodal data interoperability, user interaction and intelligibility. A web-based cultural heritage archive that compensates for these issues is presented in this paper. The multi-resolution 3D models constitute the core of the visualization on top of which supportive documentation data and multimedia content are spatial and logical connected. Our holistic approach focuses on the dynamic manipulation of the 3D scene through the development of advanced navigation mechanisms and information retrieval tools. Users parse the multi-modal content in a geo-referenced way through interactive annotation systems over cultural points of interest and automatic narrative tours. Multiple 3D and 2D viewpoints are enabled in real-time to support data inspection. The implementation exploits front-end programming languages, 3D graphic libraries and visualization frameworks to handle efficiently the asynchronous operations and preserve the initial assets' accuracy. The choice of Greece's Meteora, UNESCO world site, as a case study accounts for the platform's applicability to complex geometries and large-scale historical environments. |
Delegou, Ekaterini T; Mourgi, Georgia; Tsilimantou, Elisavet; Ioannidis, Charalabos; Moropoulou, Antonia A Multidisciplinary Approach for Historic Buildings Diagnosis: The Case Study of the Kaisariani Monastery Journal Article In: Heritage, vol. 2, no. 2, pp. 1211–1232, 2019, ISSN: 2571-9408. Abstract | Links | BibTeX | Tags: church, Cultural heritage, diagnostic study, geometric documentation, multi-disciplinary approach, non-destructive techniques, sustainable protection, thematic maps @article{Delegou2019,In this work, a multi-disciplinary approach regarding diagnostic study processes is presented, using as an example the Catholicon of Kaisariani Monastery in Attica, Greece. Kaisariani Monastery is considered one of the most important Byzantine architectural complexes in Greece. The Catholicon of Kaisariani Monastery was built during the middle Byzantine period, and has undergone many reconstructions during the centuries. It is a semi-complex, four-columned, cross-in-square church, with a cloisonné masonry. The suggested diagnostic processes included the creation of multidisciplinary thematic maps in Computer Aided Design (CAD) environment, which incorporated: (a) data of historical and architectural documentation; (b) data of geometric documentation; and (c) data of building materials characterization and decay diagnosis. The historical and general architectural data were acquired by thorough bibliographical/archival research. Geometric documentation data were acquired by three-dimensional (3D) laser scanner for the creation of the Catholicon section drawings, whereas image based photogrammetric techniques were utilized for the creation of a 3D textured model, from which orthoimages and architectural drawings of the Catholicon façades were developed. In parallel, characterization of building materials and identification of decay patterns took place after the onsite application of the nondestructive techniques of digital microscopy, infrared thermography and ground penetrating radar. These vast array kinds of data were elaborated and integrated into the architectural drawings, developing thematic maps that record and represent the current preservation state of the monument, a concerning major construction phases, the most important conservation intervention projects, building materials and decay. Furthermore, data quantification regarding the extent of building materials and decay at each monument's façade took place. Therefore, correlation and better understanding of the environmental impact on building materials according to façade orientation and historical data, e.g., construction phases, was accomplished. In conclusion, the presented processes are multidisciplinary tasks that require collaboration among architects, surveyor engineers and materials scientists/engineers. They are also prerequisites for the planning and application of compatible and efficient conservation/restoration interventions, for the ultimate goal of the sustainable protection of a monument. |
2017 |
Kontogianni, Georgia; Koutsaftis, Christos; Skamantzari, Margarita; Chrysanthopoulou, Christina; Georgopoulos, Andreas Utilising 3D Realistic Models in Serious Games for Cultural Heritage Journal Article In: Int. J. Comput. Methods Herit. Sci., vol. 1, no. 2, pp. 21–46, 2017, ISSN: 2473-5345. Abstract | Links | BibTeX | Tags: 3D models, Cultural heritage, Serious games @article{Kontogianni2017c,In the cultural heritage field, many Serious Games applications have been developed whose goal is to educate players and users not particularly specialized or familiar with this field. On the other hand, 3D models of cultural heritage objects created with precise 3D modelling methods can be a very useful asset for these applications. In this paper a composite Serious Game for the Stoa of Attalos, a prominent monument in the Ancient Athens Agora, is developed and presented. 3D models are used, which were produced mainly with automated image based modelling techniques. The creation of the 3D models is described and presented along with the development of the application, which offers three options for the player. These options are: a quiz game, a 3D visual quiz and a virtual museum. The user interaction is described and, based on an evaluation questionnaire, the application is assessed by a group of people in the Cultural Heritage field. |
Kouimtzoglou, T; Stathopoulou, E K; Agrafiotis, P; Georgopoulos, A Image-based 3D reconstruction data as an analysis and documentation tool for architects: The case of Plaka bridge in Greece Journal Article In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 2W3, pp. 391–397, 2017, ISSN: 16821750. Abstract | Links | BibTeX | Tags: Architecture, Cultural heritage, Image-based 3D reconstruction, Photogrammetry @article{Kouimtzoglou2017,Modern advances in the field of image-based 3D reconstruction of complex architectures are valuable tools that may offer the researchers great possibilities integrating the use of such procedures in their studies. In the same way that photogrammetry was a well-known useful tool among the cultural heritage community for years, the state of the art reconstruction techniques generate complete and easy to use 3D data, thus enabling engineers, architects and other cultural heritage experts to approach their case studies in an exhaustive and efficient way. The generated data can be a valuable and accurate basis upon which further plans and studies will be drafted. These and other aspects of the use of image-based 3D data for architectural studies are to be presented and analysed in this paper, based on the experience gained from a specific case study, the Plaka Bridge. This historic structure is of particular interest, as it was recently lost due to extreme weather conditions and serves as a strong proof that preventive actions are of utmost importance in order to preserve our common past. |
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". |
Georgopoulos, Andreas; Kontogianni, Georgia; Koutsaftis, Christos; Skamantzari, Margarita Serious Games at the Service of Cultural Heritage and Tourism Book Section In: Katsoni, V; Upadhya, A; Stratigea, A (Ed.): Tour. Cult. Herit. a Smart Econ., pp. 3–17, Springer, Cham, 2017. Abstract | Links | BibTeX | Tags: Cultural heritage, Serious games, Virtual museums @incollection{Georgopoulos2017b,Recent advances in contemporary technologies have greatly affected everyday life. In the field of cultural heritage, ICT (Information Communication Technologies) have enabled applications for the thorough multi-dimensional geometric documentation and consequently for the realistic visualization of monuments and artifacts. At the same time the driving force of technology is the game industry. Games and especially Serious Games can be put at the service of cultural heritage, education and tourism exploiting the aforementioned advances and especially the textured three dimensional models. They constitute an attractive platform enabling people to get acquainted with the heritage treasures and get motivated to visit the place and admire the treasures live. In this paper this technological merger is explained and three interconnected applications are presented in order to prove the concept through these implementations. They concern the development of Serious Games for an archaeological site, which aim at the trivial or more specialized information dissemination about that site, while familiarizing the prospect visitor with the environment and the monuments of the site offering the possibility of virtually visiting them. Moreover the development of a virtual museum within a game development environment is presented, which provides the possibility to learn about each exhibit, but also it offers the opportunity to the user to closely examine the exhibits through rotating their three dimensional models. All these examples use realistic models produced for documentation purposes, which convey the real impression of the monuments visualized to the user.$backslash$nKeywords: Serious Games, Cultural Heritage, Virtual Museums |
2016 |
Kontogianni, Georgia; Koutsaftis, Christos; Skamantzari, Margarita; Georgopoulos, Andreas; Chrysanthopoulou, Christina Developing and Exploiting 3D Textured Models for a Serious Game Application Proceedings Article In: 2016 8th Int. Conf. Games Virtual Worlds Serious Appl., pp. 1–4, IEEE, 2016, ISBN: 978-1-5090-2722-4. Abstract | Links | BibTeX | Tags: 3D modeling, Cultural heritage, Serious games @inproceedings{Kontogianni2016,In the field of Cultural Heritage there are many Serious Games applications. 3D models of cultural heritage objects created with 3D modelling methods preserving realism and detail can be a very useful tool for Serious Games if exploited correctly and suitably. In this paper a composite SG application is developed and presented using such realistic 3D models produced by Geomatics techniques. The construction of these 3D models is presented along with the application, which consists of three different options for the user: A virtual navigation to the site with some questions, a visit to the museum of a monument and an educational quiz game concerning the architectural reconstruction of this monument. |
Tapinaki, Sevi; Georgopoulos, Andreas; Ioannidis, Charalabos; Frentzos, Elias; Stampolidis, Nikos; Maragoudakis, Nikos Development of a Georeferenced Archaeological Information Data Base for Eleutherna in Crete Proceedings Article In: Proc. Arqueol. 2.0 – 8th Int. Congr. Archaeol. Comput. Graph. Cult. Herit. Innov. "ARQUEOLOGICA 2.0", pp. 333–336, Valencia, 2016. Abstract | Links | BibTeX | Tags: Cultural heritage, digital archaeology, Documentation, GIS, monument information system @inproceedings{Tapinaki2016,Cultural Heritage Information Management Systems (CHIMS) have been developed in order to achieve the georeference of the items in the Cultural Heritage database. Eleutherna in Crete is one of the most significant archaeological sites in Greece, with. many buildings constructed and destroyed during its long life. Hence, it is easily understandable that this vast archaeological site is complicated and difficult to understand, even by experts. In this paper the development of a Cultural Heritage Management System, called ARCHAEOsystem, is described and analyzed. The system has as geographic base a recent orthophoto of the area and for its design several parameters were taken into account. The conceptual design of the data base with the Entity-Relational (E-R) model preceded the development of this object oriented system. This E-R model is described and evaluated for its operability. After the initial experimental operation of the system, eventual practical problems will be identified and confronted. Finally, presentation of future prospects is being attempted and eventual uses of such a system are proposed. |
2022 |
Point-Cloud Segmentation for 3D Edge Detection and Vectorization Journal Article In: Heritage, vol. 5, no. 4, pp. 4037–4060, 2022, ISSN: 2571-9408, (Number: 4 Publisher: Multidisciplinary Digital Publishing Institute). |
3D simulation models for developing digital twins of heritage structures: challenges and strategies Journal Article In: Procedia Structural Integrity, vol. 37, pp. 314-320, 2022, ISSN: 2452-3216, (ICSI 2021 The 4th International Conference on Structural Integrity). |
A Technical Tool for Urban Upgrading: An Application for Cultural Heritage Preservation and Planning for Affordable Housing Journal Article In: Land, vol. 11, no. 8, pp. 1197, 2022, ISSN: 2073-445X. |
2021 |
3D HOLISTIC DOCUMENTATION OF HERITAGE MONUMENTS IN RHODES Journal Article In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XLVI-M-1-2021, pp. 739–744, 2021. |
3D AND HYPERSPECTRAL DATA INTEGRATION FOR ASSESSING MATERIAL DEGRADATION IN MEDIEVAL MASONRY HERITAGE BUILDINGS Journal Article In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. XLIII-B2-2021, pp. 583–590, 2021. |
In: pp. 78–89, Springer, Cham, 2021, ISBN: 978-3-030-73043-7. |
Edge Detection in 3D Point Clouds Using Digital Images Journal Article In: ISPRS Int. J. Geo-Information, vol. 10, no. 4, pp. 229, 2021. |
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 |
A MULTI-PURPOSE CULTURAL HERITAGE DATA PLATFORM FOR 4D VISUALIZATION AND INTERACTIVE INFORMATION SERVICES Journal Article In: ISPRS - Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci., vol. XLIII-B4-2, no. B4, pp. 583–590, 2020, ISSN: 2194-9034. |
COMPARATIVE INVESTIGATION OF THE 3D REPRESENTATIONS OF THE HOLY AEDICULE OF THE TOMB OF CHRIST Journal Article In: Arqueol. 2.0 - 9th Int. Congr. 3rd GEORES - GEOmatics Preserv., 2020. |
GIS and BIM as Integrated Digital Environments for Modeling and Monitoring of Historic Buildings Journal Article In: Appl. Sci., vol. 10, no. 3, pp. 1078, 2020, ISSN: 2076-3417. |
Semantic Classification of Monuments' Decoration Materials Using Convolutional Neural Networks: A Case Study for Meteora Byzantine Churches Proceedings Article In: Proceedings of the 13th ACM International Conference on PErvasive Technologies Related to Assistive Environments, Association for Computing Machinery, Corfu, Greece, 2020, ISBN: 9781450377737. |
2019 |
An Integrated Approach to 3D Web Visualization of Cultural Heritage Heterogeneous Datasets Journal Article In: Remote Sens., vol. 11, no. 21, pp. 2508, 2019, ISSN: 2072-4292. |
A Multidisciplinary Approach for Historic Buildings Diagnosis: The Case Study of the Kaisariani Monastery Journal Article In: Heritage, vol. 2, no. 2, pp. 1211–1232, 2019, ISSN: 2571-9408. |
2017 |
Utilising 3D Realistic Models in Serious Games for Cultural Heritage Journal Article In: Int. J. Comput. Methods Herit. Sci., vol. 1, no. 2, pp. 21–46, 2017, ISSN: 2473-5345. |
Image-based 3D reconstruction data as an analysis and documentation tool for architects: The case of Plaka bridge in Greece Journal Article In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 2W3, pp. 391–397, 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. |
Serious Games at the Service of Cultural Heritage and Tourism Book Section In: Katsoni, V; Upadhya, A; Stratigea, A (Ed.): Tour. Cult. Herit. a Smart Econ., pp. 3–17, Springer, Cham, 2017. |
2016 |
Developing and Exploiting 3D Textured Models for a Serious Game Application Proceedings Article In: 2016 8th Int. Conf. Games Virtual Worlds Serious Appl., pp. 1–4, IEEE, 2016, ISBN: 978-1-5090-2722-4. |
Development of a Georeferenced Archaeological Information Data Base for Eleutherna in Crete Proceedings Article In: Proc. Arqueol. 2.0 – 8th Int. Congr. Archaeol. Comput. Graph. Cult. Herit. Innov. "ARQUEOLOGICA 2.0", pp. 333–336, Valencia, 2016. |