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, |
Verykokou, Styliani; Soile, Sofia; Bourexis, Fotis; Tokmakidis, Panagiotis; Tokmakidis, Konstantinos; Ioannidis, Charalabos A Comparative Analysis of Different Software Packages for 3D Modelling of Complex Geometries Proceedings Article In: Ioannides, Marinos; Fink, Eleanor; Cantoni, Lorenzo; Champion, Erik (Ed.): Digital Heritage. Progress in Cultural Heritage: Documentation, Preservation, and Protection, pp. 228–240, Springer International Publishing, Cham, 2021, ISBN: 978-3-030-73043-7. Abstract | Links | BibTeX | Tags: 3D model, geometric documentation, Software evaluation @inproceedings{10.1007/978-3-030-73043-7_19, The purpose of this paper is the investigation of the performance of four well-established commercial and open-source software packages for automated image-based 3D reconstruction of complex cultural and natural heritage sites, i.e., Agisoft Metashape, RealityCapture, MicMac and Meshroom. The case study is part of the inaccessible giant rock of St. Modestos, in the archaeological site of Meteora. In terms of computational time, the commercial software packages were the most time-efficient solutions, with Metashape being the fastest one. They also have a friendlier user interface, which makes them adoptable even by non-photogrammetrists. $Alpha$ll four solutions yielded approximately comparable results in terms of accuracy and may be used for generation of 3D dense point clouds of complex sites. With the exception of Meshroom, they may produce georeferenced results. Also, with the exception of MicMac, which did not yield satisfactory results in terms of textured mesh, they may be used for generating photorealistic 3D models. The comparative analysis of the results achieved by the tested software will serve as the basis for establishing photogrammetric pipelines that may be generally used for 3D reconstruction of complex geometries. |
2020 |
Georgopoulos, Andreas; Skamantzari, Margarita; Tapinaki, Sevi Digitally Developing Medieval Fortifications Proceedings Article In: X, pp. 317–324, Universitat Politàcnica de València, Valencia, 2020, ISBN: 9788490488560. Abstract | Links | BibTeX | Tags: digital devel-opment, geometric documentation, Image-Based modelling, Terrestrial laser scanning @inproceedings{Georgopoulos2020, Modern technological advances have enabled digital automated methods to be applied for accurate and detailed documentation. Such techniques include image based modelling and terrestrial laser scanning. They can easily be adapted to perfectly suit the documentation needs for small and large objects. In this paper the digital geometric documentation of two medieval fortifications using such contemporary methods is briefly described. These are the western part of the Castle of Chios and an important part of the medieval Rhodes fortifications. The purpose of the geometric documentation for both cases was the restoration of these parts, hence detailed documentation was necessary. Conventional two-dimensional plans with digital orthophotographs were produced and from them conventional line drawings were required for the case of Chios castle. Both castle parts included cylindrical bastions, whose projection on two dimensional plans is obviously deformed. Such non-planar parts constitute a special challenge for the geometric documentation. To solve this problem the three-dimensional digital documentations of these parts were developed by using suitable development routines. Thorough presentation of all considerations for these developments are presented and the implementations are briefly described. The results of these developments are evaluated for their usefulness, accuracy, and efficiency as digital documentation products. |
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. |
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. |
2019 |
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. |
Tsilimantou, Elisavet; Delegou, Ekaterini T; Bourexis, Fotios; Tapeinaki, Sevasti; Soile, Sofia; Ioannidis, Charalabos; Moropoulou, Antonia In: Osman, A; Moropoulou, A (Ed.): Nondestruct. Eval. Monit. Technol. Doc. Diagnosis Preserv. Cult. Heritage. Springer Proc. Mater., pp. 234–248, Springer, Cham, 2019. Links | BibTeX | Tags: Acropolis of Erimokastro Rhodes, Ancient walls, Archaeological site, geometric documentation, Multidisciplinary study, non-destructive techniques @incollection{Elisavet2019, |
2017 |
Georgopoulos, A; Lambrou, E; Pantazis, G; Agrafiotis, P; Papadaki, A; Kotoula, L; Lampropoulos, K; Delegou, E; Apostolopoulou, M; Alexakis, M; Moropoulou, A In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 5W1, pp. 487–494, 2017, ISSN: 16821750. Abstract | Links | BibTeX | Tags: Geomatics, geometric documentation, Image based modelling, Materials, non-destructive techniques, Terrestrial laser scanning @article{Georgopoulos2017, The National Technical University of Athens undertook the compilation of an "Integrated Diagnostic Research Project and Strategic Planning for Materials, Interventions Conservation and Rehabilitation of the Holy Aedicule of the Church of the Holy Sepulchre in Jerusalem". This paper focuses on the work merging the geometric documentation with the characterization of materials, the identification of building phases and the diagnosis of decay and pathology through the use of analytical and non-destructive techniques. Through this integrated approach, i.e. through the documentation and characterization of the building materials, through the diagnosis of decay and pathology, through the accurate geometric documentation of the building and through the non-destructive prospection of its internal structure, it was feasible to identify the construction phases of the Holy Aedicule, identifying the remnants of the preserved earlier constructions and the original monolithic Tomb. This work, thus, demonstrates that the adoption of an interdisciplinary approach for integrated documentation is a powerful tool for a better understanding of monuments, both in terms of its structural integrity, as well as in terms of its state of preservation, both prerequisites for effective rehabilitation. |
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. |
A Comparative Analysis of Different Software Packages for 3D Modelling of Complex Geometries Proceedings Article In: Ioannides, Marinos; Fink, Eleanor; Cantoni, Lorenzo; Champion, Erik (Ed.): Digital Heritage. Progress in Cultural Heritage: Documentation, Preservation, and Protection, pp. 228–240, Springer International Publishing, Cham, 2021, ISBN: 978-3-030-73043-7. |
2020 |
Digitally Developing Medieval Fortifications Proceedings Article In: X, pp. 317–324, Universitat Politàcnica de València, Valencia, 2020, ISBN: 9788490488560. |
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. |
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. |
2019 |
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. |
In: Osman, A; Moropoulou, A (Ed.): Nondestruct. Eval. Monit. Technol. Doc. Diagnosis Preserv. Cult. Heritage. Springer Proc. Mater., pp. 234–248, Springer, Cham, 2019. |
2017 |
In: Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. - ISPRS Arch., vol. 42, no. 5W1, pp. 487–494, 2017, ISSN: 16821750. |