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This paper describes the aim towards a nonlinear processing system for satellite image enhancement and smoothing that prepares image for a successful feature extraction through edge detection. Emphasis was given to coastlines, man made... more
This paper describes the aim towards a nonlinear processing system for satellite image enhancement and smoothing that prepares image for a successful feature extraction through edge detection. Emphasis was given to coastlines, man made objects such as airports, dams, buildings and linear features such as roads and parcel boundaries. Rank order morphological operators and adaptive filtering were employed leading to a promising result. Adaptive filtering was adopted to smooth the image, homogenize regions and at the same ...
abstract A relatively new field of interest, which continuously gains grounds nowadays, is digital 3D modeling. However, the methodologies, the accuracy and the time and effort required to produce a high quality 3D model have been... more
abstract A relatively new field of interest, which continuously gains grounds nowadays, is digital 3D modeling. However, the methodologies, the accuracy and the time and effort required to produce a high quality 3D model have been changing drastically the last few years. Whereas in the early days of digital 3D modeling, 3D models were only accessible to computer experts in animation, working many hours in expensive sophisticated software, today 3D modeling has become reasonably fast and convenient. On top of that, with ...
This paper aims to explore the formation of crops marks over archaeological features using remote sensing data. Crop marks are very important to archaeological research since they can reveal in an indirect way buried archaeological... more
This paper aims to explore the formation of crops marks over archaeological features using remote sensing data. Crop marks are very important to archaeological research since they can reveal in an indirect way buried archaeological remains. Several researches have been able to locate subsurface relics via interpretation of multispectral and hyperspectral satellite images. However the best phenophase (time-window) where these crop marks are enhanced and which spectral bands are the most capable for this enhancement are still ...
Nowadays, humanity feels obliged to maintain cultural heritage for our future generations. To that end, numerous experts are contributing. Contemporary technological advances, i.e. digital achievements, have helped a lot to this end. In... more
Nowadays, humanity feels obliged to maintain cultural heritage for our future generations. To that end, numerous experts are contributing. Contemporary technological advances, i.e. digital achievements, have helped a lot to this end. In this paper, these technological advances are briefly presented and explained. It is attempted to show how these advances may help cultural heritage if applied correctly and wisely. The argument is not how they will replace traditional documentation or conservation methods, but how they will support, enhance and supplement them for achieving the desired result with sensitivity and knowledge. The available digital documentation techniques are described along with the contemporary nondestructive techniques for cultural heritage pathology diagnosis and conservation. Their advantages are investigated along with their implementation actions. These techniques include image-based methodologies for producing three-dimensional models of which traditional two-dimensional products may be extracted, laser scanning techniques to acquire directly three-dimensional information from the object, nondestructive techniques in order to diagnose pathology problems, etc. In order to highlight these techniques, several examples are presented. The alternative uses of the contemporary digital techniques are highlighted through these examples. Among others, the following applications will be presented: The virtual restoration of a collapsed stone bridge, the virtual restoration of a monument exposed to the weather conditions and the development of a virtual museum are presented. Finally, a future outlook is attempted, in order to envisage the path that the implementation of these technological advances will lead the worldwide effort to document and preserve our cultural heritage.
Over the last decades, the concept of Cultural Heritage has included Intangible Cultural Heritage (ICH), mainly due to UNESCO's initiatives. ICH is in danger of disappearance or degradation due to globalization, immigration,... more
Over the last decades, the concept of Cultural Heritage has included Intangible Cultural Heritage (ICH), mainly due to UNESCO's initiatives. ICH is in danger of disappearance or degradation due to globalization, immigration, urbanization etc. On the other hand, ICH is strongly related to the features of space. It is formed and developed in a specific location, which is influenced by the vicinity with other civilizations. Its topographic features (altitude, inclination, distance from sea or freshwater, climate etc.), their influence in everyday life and the natural raw materials present are determinant in the process of the ICH formation. It is very important to capture and analyze the various forms of ICH, in order to extract the latent human creativity hidden in them, while at the same time studying the influence of space on their evolution. Their capture should be done by implementing appropriate equipment, methods and archival formats in order to fully describe them and to ensure the preservation of the resulting digital archives. Nowadays, the evolution of technology provides flexible means towards this aim. Furthermore, Geographic Information Systems (GIS) are a tool to disseminate and manage spatial data and their relations to attributes, like the forms of ICH. They allow the correlation of data, the response to spatial queries and they can lucidly visualize the data. On one hand, a web GIS system, can designate and preserve ICH by presenting the digital records of its forms and by focusing on its relations to place. On the other hand, such a system can be implemented on a research level, by introducing the analysis of the ICH forms, in order to study the influence of the geographic and topographic features of space on their evolution and formation and to study similarities and relationships between ICH of different communities and cultures. This paper describes an integrated approach to the issues of digitization of ICH and the implementation of the analysis within a GIS environment. Its practical application requires large effort by a multidisciplinary scientific team.
The Church of the Holy Sepulchre (Church of the Resurrection) is one of the most important historical sites of Christianity. The current Aedicule structure is the result of various construction phases, damages and destructions,... more
The Church of the Holy Sepulchre (Church of the Resurrection) is one of the most important historical sites of Christianity. The current Aedicule structure is the result of various construction phases, damages and destructions, reconstructions, and protection interventions, and as such, it serves as an emblematic case study for five-dimensional (5D) modelling. The innovative and interdisciplinary approach adopted for the modelling of the Holy Aedicule of the Church of the Holy Sepulchre utilizes data from the following: (a) architectural documentation: Description of the current form and structure, as well as its evolution through the ages, based on historic documentation; (b) analysis of construction phases: The construction phases were revealed by a ground-penetrating radar (GPR) survey that was implemented within an integrated methodology, which enabled the technique to identify the various interfaces; (c) geometric documentation: Generation of a 3D high-resolution model, through...
The increasing need for accurate bathymetric mapping is essential for a plethora of offshore activities. Even though aerial image datasets through Structure from Motion (SfM) and Multi-View Stereo (MVS) techniques can provide a low-cost... more
The increasing need for accurate bathymetric mapping is essential for a plethora of offshore activities. Even though aerial image datasets through Structure from Motion (SfM) and Multi-View Stereo (MVS) techniques can provide a low-cost alternative compared to LiDAR and SONAR, offering additionally, important visual information, water refraction poses significant obstacles in delivering accurate bathymetry. In this article, the generation of manned and unmanned airborne synthetic datasets of dry and water covered areas is presented. These data are used to train models for correcting the geometric effects of refraction on real-world image-based point clouds and aerial images. Based on a thorough evaluation, important improvements are presented, indicating the increased accuracy and the reduced noise in the point clouds of the derived bathymetric products, meeting also the International Hydrographic Organization’s (IHO) standards.
For the purposes of a research project, for the compilation of the archaeological and environmental digital map of the island of Antiparos, the production of updated large scale orthophotos was required. Hence suitable stereoscopic high... more
For the purposes of a research project, for the compilation of the archaeological and environmental digital map of the island of Antiparos, the production of updated large scale orthophotos was required. Hence suitable stereoscopic high resolution satellite imagery was acquired. Two Geoeye-1 stereopairs were enough to cover this small island of the Cyclades complex in the central Aegean. For the orientation of the two stereopairs numerous ground control points were determined using GPS observations. Some of them would also serve as check points. The images were processed using commercial stereophotogrammetric software suitable to process satellite stereoscopic imagery. The results of the orientations are evaluated and the digital terrain model was produced using automated and manual procedures. The DTM was checked both internally and externally with comparison to other available DTMs. In this paper the procedures for producing the desired orthophotography are critically presented and the final result is compared and evaluated for its accuracy, completeness and efficiency. The final product is also compared against the orthophotography produced by Ktimatologio S.A. using aerial images in 2007. The orthophotography produced has been evaluated metrically using the available check points, while qualitative evaluation has also been performed. The results are presented and a critical approach for the usability of satellite imagery for the production of large scale orthophotos is attempted.
Being at the crossway of trade routes, Ioannina, in northwestern Greece, has known overtime an economic and spiritual flourishment reflected in the city's urban web, which has, unfortunately, undergone major alterations. Focusing on... more
Being at the crossway of trade routes, Ioannina, in northwestern Greece, has known overtime an economic and spiritual flourishment reflected in the city's urban web, which has, unfortunately, undergone major alterations. Focusing on the city's Post-Byzantine period, starting in 1430, for tracing its pluralistic physiognomy, studying the osmosis of its three cultures, Christian, Jewish and Muslim, and figuring out the related cultural palimpsest, still surviv-ing in the collective memory of the city, has been the great challenge of IASIS Postdoctoral Research Project.1 Extensive documentation of various origin, dynamic and combined interpreta-tion and processing of multiple data, cross-checking of the detected infor-mation, have formed the basic principles of IASIS project development. The specific paper forms the first part of Hagia Paraskevi Christian Byzantine Monastery-Namaz Giyah Muslim Mosque-Perifereia Hellenic State Adminis-trative Building cultural landmarks’ integra...
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... more
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, ...
Santana Quintero, M.; Georgopoulos, A.; Stylianidis, E.; Lerma García, JL.; Remondino, F. (2017). CIPA's mission: Digitally documenting cultural heritage. APT Bulletin: The Journal of Preservation Technology. 48(4):51-54.... more
Santana Quintero, M.; Georgopoulos, A.; Stylianidis, E.; Lerma García, JL.; Remondino, F. (2017). CIPA's mission: Digitally documenting cultural heritage. APT Bulletin: The Journal of Preservation Technology. 48(4):51-54. http://hdl.handle.net/10251/104016S515448
Consistent with the objective of ICOMOS, cross-disciplinary collaborations between International Scientific Committees has long been encouraged. In order to promote the exchange of information and knowledge on cultural heritage... more
Consistent with the objective of ICOMOS, cross-disciplinary collaborations between International Scientific Committees has long been encouraged. In order to promote the exchange of information and knowledge on cultural heritage conservation, CIPA, ICORP and ISCARSAH, the three ISCs have organized cooperatively the CIPA-ICORP-ISCARSAH 2017 Joint Meeting (CII 2017). The 30 papers of CII2017 on cultural heritage studies are cross-disciplinary and cover topics at least in two fields of CIPA, ICORP and ISCARSAH. Topics of interest include, but are not limited to, the following areas: a.Research trends, results and findings b.Integration platform c.Education and knowledge dissemination d.Public participation and engagement e.Case studies for application f.Possible collaborations of ICOMOS International Scientific Committees for the future
The National Technical University of Athens undertook the Rehabilitation of the Holy Aedicule of the Church of the Holy Sepulchre in Jerusalem. This paper briefly presents the three-dimensional digital geometric documentation of the... more
The National Technical University of Athens undertook the Rehabilitation of the Holy Aedicule of the Church of the Holy Sepulchre in Jerusalem. This paper briefly presents the three-dimensional digital geometric documentation of the monument, which was considered necessary to support the characterization of materials, the identification of building phases and the diagnosis of decay and pathology using analytical and non-destructive techniques during all phases of the rehabilitation implementation. The provided information by these studies enabled the proper implementation of the necessary actions to restore the monument to a sustainable state for the future pilgrims. This work also 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.
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... more
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.

And 360 more

Stefanakis,Manolis I., Kalogeropoulos, K., Georgopoulos, A. and Bourbou, Ch. in .C. Haggis and C.M. Antonaccio (eds.), Classical Archaeology in Context. Theory and Practice in Excavation in the Greek World, Walter de Gruyter, 2015,... more
Stefanakis,Manolis I.,  Kalogeropoulos, K., Georgopoulos, A. and Bourbou, Ch.

in .C. Haggis and C.M. Antonaccio (eds.), Classical Archaeology in Context. Theory and Practice in Excavation in the Greek World, Walter de Gruyter, 2015, 259-314
Research Interests:
Classical Archaeology, Bioarchaeology, Landscape Archaeology, Archaeological Method & Theory, Survey (Archaeological Method & Theory), and 21 more
(Archaeological Theory, Archaeological Fieldwork, Archaeological theory and practice, Field Archaeology, Archaeological field survey, Archaeological Method and Theory, Ancient Greek archaeology, Anthropological Archaeology, GIS Applications in Archaeology, Near Eastern Archaeology, Bronze Age Aegean, Classical Archaeology, Infant burials, Mycenaean pottery, Anthropology, Immigration theory, Sea Peoples, Mythology, Creation Myths, Archaeology, Classical archaeology, Greek and Roman history, Greek Colonization (Magna Graecia and Sicily), Material Culture Studies, Funerary Archaeology, Landscape Archaeology, Field Archaeology, Archaeological GIS, Bioarchaeology, human & faunal osteology, Geometrical documentation, Necropolis, Hellenistic Rhodes, Ancient Rhodes, New Technologies in Archaeology, Bioarchaeology, Osteology, Paleopathology, Archaeological Fieldwork In Practice and Theory, and Kymissala, Rhodes)
Το καινοτόμο και πρωτοποριακό σε εκπαιδευτικό και ερευνητικό επίπεδο Πρόγραμμα Μεταπτυχιακών Σπουδών (ΠΜΣ) «Αρχαιολογία της Ανατολικής Μεσογείου από την Προϊστορική Εποχή έως την Ύστερη Αρχαιότητα: Ελλάδα, Αίγυπτος, Εγγύς Ανατολή» του... more
Το καινοτόμο και πρωτοποριακό σε εκπαιδευτικό και ερευνητικό επίπεδο Πρόγραμμα Μεταπτυχιακών Σπουδών (ΠΜΣ) «Αρχαιολογία της Ανατολικής Μεσογείου από την Προϊστορική Εποχή έως την Ύστερη Αρχαιότητα: Ελλάδα, Αίγυπτος, Εγγύς Ανατολή» του Πανεπιστημίου Αιγαίου (ΦΕΚ 2126/02.10.2015) θα δεχτεί για τρίτη συνεχή χρονιά μεταπτυχιακούς φοιτητές/τριες για το ακαδημαϊκό έτος 2016-2017. Το Πρόγραμμα απονέμει Μεταπτυχιακό Δίπλωμα Ειδίκευσης στην «Αρχαιολογία της Ανατολικής Μεσογείου από την Προϊστορική Εποχή έως την Ύστερη Αρχαιότητα: Ελλάδα, Αίγυπτος, Εγγύς Ανατολή».
Αντικείμενο του ΠΜΣ είναι η εκπαίδευση επιστημόνων στους θεματικούς άξονες της αρχαιολογίας, αιγυπτιολογίας, αρχαίας ιστορίας και των διαπολιτισμικών επαφών στην ανατολική Μεσόγειο της Εποχής του Χαλκού και των Ιστορικών Χρόνων. Επιπλέον, το ΠΜΣ στοχεύει α) στην απόκτηση ειδικών γνώσεων στη θεωρία και μεθοδολογία της ιστορικής και αρχαιολογικής έρευνας των πολιτισμών της ανατολικής Μεσογείου και κυρίως των τεχνικών και των αναλυτικών εργαλείων της για τη μελέτη και επιστημονική εμβάθυνση των θεωρητικών και εφαρμοσμένων πεδίων της αρχαιολογικής επιστήμης, και β) στην εξοικείωση των εκπαιδευόμενων με την κριτική επεξεργασία πρωτογενών και δευτερογενών πηγών και την ανάπτυξη της επιστημονικής μεθοδολογίας και των λειτουργικών εργαλείων για την διεξαγωγή έρευνας.
Η διδασκαλία βασίζεται: α) σε διά ζώσης μαθήματα/συναντήσεις (3-4 φορές το εξάμηνο) και β) σε εξ΄ αποστάσεως ηλεκτρονική μάθηση μέσω συστημάτων σύγχρονης τηλεκπαίδευσης (πλατφόρμα ασύγχρονης εκπαίδευσης Moodle και σύγχρονης τηλεκπαίδευσης Big Blue Button).

Οι ενδιαφερόμενοι/ες μπορούν να υποβάλλουν το φάκελο υποψηφιότητας στο σύστημα ηλεκτρονικής υποβολής αιτήσεων https://nautilus.aegean.gr/ έως και τη Δευτέρα 31/05/2016.
Πληροφορίες: Γραμματεία ΠΜΣ (κα. Μαρία Τσαμούρη), τηλ. 22410-99370 και 99340, κιν. 6973684784, email: Rhodes_pms_eastarch@aegean.gr, ιστοσελίδα: http://dms.aegean.gr
Research Interests:
Αντικείμενο του ΠΜΣ «Αρχαιολογία της Ανατολικής Μεσογείου: Ελλάδα, Αίγυπτος, Εγγύς Ανατολή» είναι η εκπαίδευση επιστημόνων στους θεματικούς άξονες της αρχαιολογίας, αιγυπτιολογίας, αρχαίας ιστορίας και των διαπολιτισμικών επαφών στην... more
Αντικείμενο του ΠΜΣ «Αρχαιολογία της Ανατολικής Μεσογείου: Ελλάδα, Αίγυπτος, Εγγύς Ανατολή» είναι η εκπαίδευση επιστημόνων στους θεματικούς άξονες της αρχαιολογίας, αιγυπτιολογίας, αρχαίας ιστορίας και των διαπολιτισμικών επαφών στην ανατολική Μεσόγειο της Εποχής του Χαλκού και των Ιστορικών Χρόνων. Επιπλέον, το ΠΜΣ στοχεύει α) στην απόκτηση ειδικών γνώσεων στη θεωρία και μεθοδολογία της ιστορικής και αρχαιολογικής έρευνας των πολιτισμών της ανατολικής Μεσογείου και κυρίως των τεχνικών και των αναλυτικών εργαλείων της για τη μελέτη και επιστημονική εμβάθυνση των θεωρητικών και εφαρμοσμένων πεδίων της αρχαιολογικής επιστήμης, καθώς και β) στην εξοικείωση των εκπαιδευόμενων με την κριτική επεξεργασία πρωτογενών και δευτερογενών πηγών και την ανάπτυξη της επιστημονικής μεθοδολογίας και των λειτουργικών εργαλείων για την διεξαγωγή έρευνας.
In its traditional sense, heritage, whether tangible or intangible, can be defined as monuments, cultural and natural sites, museum collections, archives, libraries, manuscripts (to name a few) or practices that a society inherits from... more
In its traditional sense, heritage, whether tangible or intangible, can be defined as monuments, cultural and natural sites, museum collections, archives, libraries, manuscripts (to name a few) or practices that a society inherits from its past, and intends to preserve and transmit to future generations.
Technological developments are hugely impacting the work of restoring, renovating, protecting, documenting and archiving our cultural heritage. This collection of peer-reviewed papers explores the theme of cultural heritage and technology... more
Technological developments are hugely impacting the work of restoring, renovating, protecting, documenting and archiving our cultural heritage. This collection of peer-reviewed papers explores the theme of cultural heritage and technology in relation to data-capture, digitization, architectural computing, reconstruction, modelling, information data-processing, virtual reality applications, standardization, data visualization and archiving. This exploration of the possibilities of digital preservation makes this book a valuable resource for the cultural heritage community.