Research Projects

Styliani Verykokou has participated in four research projects, namely, "4D-CH-World", "5DMuPLIS" and "State-of-the-art mapping technologies for Public Work Studies and Environmental Impact Assessment Studies", as part of the NTUA team, and "INACHUS", as part of the ICCS (Institute of Communications and Computer Systems) team. Currently, she participates in the research project "METEORA", as part of the NTUA team.


Current research projects

2015-2018 (ongoing project)
The integrated documentation of archaeological sites and religious monuments is an international research issue in Geoinformatics. The complexity of such sites combined with the requirements for high accuracies, the need for 3D visualization of geospatial information in high resolution, the change detection and monitoring through time, require the development and implementation of contemporary techniques and procedures for documentation of multiple dimensions (spatial and qualitative). However, the available techniques and methods are either inadequate (e.g., the lack of 3D GIS systems with 3D topology) or time-consuming and require high computing power (e.g., for the compilation of georeferenced photorealistic 3D modelling).
The objective of the METEORA project is to overcome these issues by the creation of an easy-to-use digital platform for multiple applications and potential users, that will support an interactive Information System for a multi-dimensional documentation of Cultural Heritage sites. The innovations of the proposal are: the introduction of innovative techniques for data collection, processing and multi-dimensional visualization of the spatial model and their correlation with appropriately structured databases (with various types of data) in order to create the optimum Information System (named "Meteora"); the automation of techniques combining spatial data that are collected from various sources in a unified adjustment, such as images from UAV with direct georeferencing, laser scanning point clouds and terrestrial measurements. Also, at the processing stage, innovation refers to the development of software for the creation of an operational 4D model, using the scale as the 4th dimension of the model; that is, the creation of a unified 3D textured model whose scale of detail representation varies automatically as the user moves around the model. Thus, the parts of the 3D model that are close to the user are represented with more details than those that are distant, without requiring any action from the user. In addition, an augmented reality model will be developed, with the introduction of 3D structures of the past that no longer exist or 3D models of missing parts of the cultural monument into the reality 3D/4D model.
The digital platform for the Information System "Meteora" will be supported by portable or desktop computer devices, smartphones and tablets. The application of the above mentioned innovative techniques and the development of the platform will be implemented for a part of the Holy Meteora; the case study will be for the area of two non-accessible huge rocks (Modi and Alyssos) on top of which ruins of old monasteries and other old constructions exist. The broader area is inhabited by an active monastic community of multi-century-long history, which is recognized as a Holy Area and an important archaeological site.
This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 607522.

Related papers:

C. Ioannidis, S. Verykokou, S. Soile and A.-M. Boutsi, "A multi-purpose cultural heritage data platform for 4D visualization and interactive information services," in XXIV ISPRS Congress, July 4-10, 2021, Nice, France, The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

C. Ioannidis, C. Potsiou, S. Soile, S. Verykokou and A.-M. Boutsi, "Geospatial big data management for a holistic documentation of complex sites – the case of Meteora, Greece," in FIG Commission 3 Annual Meeting and Workshop 2019: Advances in Geodata Analytics for Smart Cities and Regions, September 23-28, 2019, Cluj-Napoca, Romania.


Completed research projects

2015-2018
INACHUS aimed to achieve a significant time reduction related to Urban Search and Rescue (USaR) phase by providing wide-area situation awareness solutions for improved detection and localisation of the trapped victims assisted by simulation tools for predicting structural failures and a holistic decision support mechanism incorporating operational procedures and resources of relevant actors.
This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 607522.

Related papers:
S. Verykokou, C. Ioannidis, G. Athanasiou, N. Doulamis and A. Amditis, "3D reconstruction of disaster scenes for urban search and rescue." Multimedia Tools and Applications (April 2018), pp. 9691-9717, doi: 10.1007/s11042-017-5450-y.

S. Verykokou, A. Doulamis, G. Athanasiou, C. Ioannidis and A. Amditis, "Multi-scale 3D modelling of damaged cultural sites: Use cases and image-based workflows," in Digital Heritage. Progress in Cultural Heritage: Documentation, Preservation and Protection: Proceedings of the 6th International Conference, EuroMed 2016, October 31 - November 5, 2016, Nicosia, Cyprus, LNCS 10058, M. Ioannides et al., Eds. Switzerland: Springer International Publishing, 2016, pp. 50-62, doi: 10.1007/978-3-319-48496-9_5.

S. Verykokou, A. Doulamis, G. Athanasiou, C. Ioannidis and A. Amditis, "UAV-based 3D modelling of disaster scenes for urban search and rescue," in 2016 IEEE International Conference on Imaging Systems and Techniques (IST), October 4-6, 2016, Chania, Crete Island, Greece, pp. 106-111, IEEE.


2013-2016
This project aimed to analyze, design, research, develop and validate an innovative system integrating the latest advances in computer vision and learning, as well as, 3D modeling and virtual reality for the rapid and cost-effective 4D maps reconstruction in the wild for personal use, and support the aim of our European Commons and the digital libraries EUROPEANA and UNESCO Memory of the World (MoW) to build a sense of a shared European cultural history and identity.
This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 324523.


5DMuPLIS: 5 Dimensional Multi-Purpose Land Information System

2014-2015
This project has developed an advanced 5D Multi-Purpose LIS (Land information System) for integrating and managing various types of information (financial, architectural, topographical, cadastral, valuation, engineering, ownership, etc.) from governmental, regional and local databases at three spatial dimensions + time + scale. The system allows representation and analysis of real estate properties and manmade features in three physical dimensions (X,Y,Z), through time (planning phase, development phase, registration phase, modification phase, and so on) and at varying scales (level of detail).
This project was co-funded by the EU (European Regional Development Fund/ERDF) and the General Secretariat for Research and Technology (GSRT).

Related papers:

C. Potsiou, C. Ioannidis, S. Soile and S. Verykokou, "A technical and policy tool for urban upgrading and affordable housing planning," in FIG Commission 3 Annual Workshop and Annual Meeting: From Volume to Quality - Bridging the Gap for Spatial Data Infrastructure, November 3-7, 2016, Iasi, Romania.

C. Ioannidis, C. Potsiou, S. Soile, S. Verykokou, G. Mourafetis and N. Doulamis, "Technical Aspects for the Creation of a Multi-Dimensional Land Information System," in XXIII ISPRS Congress, July 12-19, 2016, Prague, Czech Republic, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B2, 115-122, doi:10.5194/isprs-archives-XLI-B2-115-2016.

C. Ioannidis, S. Verykokou, S. Soile and C. Potsiou, "5D Multi-Purpose Land Information System," in 3rd Eurographics Workshop on Urban Data Modelling and Visualisation, November 23, 2015, Delft, the Netherlands, doi: 10.2312/udmv.20151344.

Related presentations:

D. Bliziotis, V. Charalampopoulou, C. Ioanidis, S. Verykokou and E. Maltezos, "5D Information System for Smart and Sustainable Cities (in Greek)," in 9th Nationwide HellasGIs Conference, December 8-9, Athens, Greece.

C. Potsiou, C. Ioannidis, S. Soile, S. Verykokou, "A Tool for Affordable Housing Development," in High-Level Joint FIG / World Bank Conference on Sustainable Real Estate Markets - Policy Framework and Necessary Reforms, September 19-20, 2016, Athens, Greece.


State-of-the-art mapping technologies for Public Work Studies and Environmental Impact Assessment Studies

2014-2015
This project was co-funded by the EU (European Regional Development Fund/ERDF) and the General Secretariat for Research and Technology (GSRT).

Related paper:

C. Ioannidis, S. Soile, A. Stamos, D. Vassilaki, E. Maltezos and S. Verykokou, "Exploitation of Satellite Optical and SAR Data for Public Work Studies," in Third International Conference on Remote Sensing and Geoinformation of Environment, March 16-19, 2015, Paphos, Cyprus, Proc. of SPIE vol. 9535, 95350I, D. G. Hadjimitsis et al., Eds., doi:10.1117/12.2193483.

Doctoral Research

Title of Doctoral Dissertation: Georeferencing procedures for oblique aerial images (2020)
Supervisor: Charalabos Ioannidis, Professor of Photogrammetry at Sch. of Rural & Surveying Eng., NTUA

Related papers:

S. Verykokou and C. Ioannidis, "Exterior orientation estimation of oblique aerial images using SfM-based robust bundle adjustment." International Journal of Remote Sensing (2020), doi: 10.1080/01431161.2020.1755737.

S. Verykokou and C. Ioannidis, "A global photogrammetry-based Structure from Motion framework: Application in oblique aerial Images,” in FIG Working Week 2019: Geospatial information for a smarter life and environmental resilience, April 22-26, 2019, Hanoi, Vietnam.

S. Verykokou and C. Ioannidis, "A photogrammetry-based Structure from Motion algorithm using robust iterative bundle adjustment techniques," in 3D GeoInfo, October 1-2, 2018, Delft, The Netherlands, ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, IV-4/W6, 73-80, doi: 10.5194/isprs-annals-IV-4-W6-73-2018.

S. Verykokou and C. Ioannidis, "Oblique aerial images: a review focusing on georeferencing procedures." International Journal of Remote Sensing (February 2018), vol. 39, issue 11, pp. 3452-3496, doi: 10.1080/01431161.2018.1444294.

S. Verykokou and C. Ioannidis, "Automatic Rough Georeferencing of Multiview Oblique and Vertical Aerial Image Datasets of Urban Scenes." The Photogrammetric Record, vol. 31, issue 155 (September 2016), pp. 281-303, doi: 10.1111/phor.12156.

S. Verykokou and C. Ioannidis, "Exterior Orientation Estimation of Oblique Aerial Imagery Using Vanishing Points," in XXIII ISPRS Congress, July 12-19, 2016, Prague, Czech Republic, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B3, 123-130, doi:10.5194/isprs-archives-XLI-B3-123-2016.

S. Verykokou and C. Ioannidis, "Metric Exploitation of a Single Low Oblique Aerial Image," in FIG Working Week 2015: From the Wisdom of the Ages to the Challenges of the Modern World, May 17-21, 2015, Sofia, Bulgaria.

Diploma Thesis