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A valuable aspect during crime scene investigation is the digital documentation of the scene. Traditional means of documentation include photography and in situ measurements from experts for further analysis. Although 3D reconstruction of pertinent scenes has already been explored as a complementary tool in investigation pipelines, such technology is considered unfamiliar and not yet widely adopted. This is explained by the expensive and specialised digitisation equipment that is available so far. However, the emergence of high-precision but low-cost devices capable of scanning scenes or objects in 3D has been proven as a reliable alternative to their counterparts. This paper summarises and analyses the state-of-the-art technologies in scene documentation using 3D digitisation and assesses the usefulness in typical police-related situations and the forensics domain in general. We present the methodology for acquiring data for 3D reconstruction of various types of scenes. Emphasis is placed on the applicability of each technique in a wide range of situations, ranging in type and size. The application of each reconstruction method is considered in this context and compared with respect to additional constraints, such as time availability and simplicity of operation of the corresponding scanning modality. To further support our findings, we release a multi-modal dataset obtained from a hypothetical indoor crime scene to the public.
George Galanakis; Xenophon Zabulis; Theodore Evdaimon; Sven-Eric Fikenscher; Sebastian Allertseder; Theodora Tsikrika; Stefanos Vrochidis. A Study of 3D Digitisation Modalities for Crime Scene Investigation. Forensic Sciences 2021, 1, 56 -85.
AMA StyleGeorge Galanakis, Xenophon Zabulis, Theodore Evdaimon, Sven-Eric Fikenscher, Sebastian Allertseder, Theodora Tsikrika, Stefanos Vrochidis. A Study of 3D Digitisation Modalities for Crime Scene Investigation. Forensic Sciences. 2021; 1 (2):56-85.
Chicago/Turabian StyleGeorge Galanakis; Xenophon Zabulis; Theodore Evdaimon; Sven-Eric Fikenscher; Sebastian Allertseder; Theodora Tsikrika; Stefanos Vrochidis. 2021. "A Study of 3D Digitisation Modalities for Crime Scene Investigation." Forensic Sciences 1, no. 2: 56-85.
The design and implementation of a contactless scanner and its software are proposed. The scanner regards the photographic digitization of planar and approximately planar surfaces and is proposed as a cost-efficient alternative to off-the-shelf solutions. The result is 19.8 Kppi micrometer scans, in the service of several applications. Accurate surface mosaics are obtained based on a novel image acquisition and image registration approach that actively seeks registration cues by acquiring auxiliary images and fusing proprioceptive data in correspondence and registration tasks. The device and operating software are explained, provided as an open prototype, and evaluated qualitatively and quantitatively.
Xenophon Zabulis; Panagiotis Koutlemanis; Nikolaos Stivaktakis; Nikolaos Partarakis. A Low-Cost Contactless Overhead Micrometer Surface Scanner. Applied Sciences 2021, 11, 6274 .
AMA StyleXenophon Zabulis, Panagiotis Koutlemanis, Nikolaos Stivaktakis, Nikolaos Partarakis. A Low-Cost Contactless Overhead Micrometer Surface Scanner. Applied Sciences. 2021; 11 (14):6274.
Chicago/Turabian StyleXenophon Zabulis; Panagiotis Koutlemanis; Nikolaos Stivaktakis; Nikolaos Partarakis. 2021. "A Low-Cost Contactless Overhead Micrometer Surface Scanner." Applied Sciences 11, no. 14: 6274.
This paper presents a knowledge representation framework and provides tools to allow the representation and presentation of the tangible and intangible dimensions of culinary tradition as cultural heritage including the socio-historic context of its evolution. The representation framework adheres to and extends the knowledge representation standards for the Cultural Heritage (CH) domain while providing a widely accessible web-based authoring environment to facilitate the representation activities. In strong collaboration with social sciences and humanities, this work allows the exploitation of ethnographic research outcomes by providing a systematic approach for the representation of culinary tradition in the form of recipes, both in an abstract form for their preservation and in a semantic representation of their execution captured on-site during ethnographic research.
Nikolaos Partarakis; Danae Kaplanidi; Paraskevi Doulgeraki; Effie Karuzaki; Argyro Petraki; Daniele Metilli; Valentina Bartalesi; Ilia Adami; Carlo Meghini; Xenophon Zabulis. Representation and Presentation of Culinary Tradition as Cultural Heritage. Heritage 2021, 4, 612 -640.
AMA StyleNikolaos Partarakis, Danae Kaplanidi, Paraskevi Doulgeraki, Effie Karuzaki, Argyro Petraki, Daniele Metilli, Valentina Bartalesi, Ilia Adami, Carlo Meghini, Xenophon Zabulis. Representation and Presentation of Culinary Tradition as Cultural Heritage. Heritage. 2021; 4 (2):612-640.
Chicago/Turabian StyleNikolaos Partarakis; Danae Kaplanidi; Paraskevi Doulgeraki; Effie Karuzaki; Argyro Petraki; Daniele Metilli; Valentina Bartalesi; Ilia Adami; Carlo Meghini; Xenophon Zabulis. 2021. "Representation and Presentation of Culinary Tradition as Cultural Heritage." Heritage 4, no. 2: 612-640.
Improving the well-being and quality of life of the elderly population is closely related to assisting them to effectively manage age-related conditions such as chronic illnesses and anxiety, and to maintain their independence and self-sufficiency as much as possible. This paper presents the design, architecture and implementation structure of an adaptive system for monitoring the health and well-being of the elderly. The system was designed following best practices of the Human-Centred Design approach involving representative end-users from the early stages.
Ilia Adami; Michalis Foukarakis; Stavroula Ntoa; Nikolaos Partarakis; Nikolaos Stefanakis; George Koutras; Themistoklis Kutsuras; Danai Ioannidi; Xenophon Zabulis; Constantine Stephanidis. Monitoring Health Parameters of Elders to Support Independent Living and Improve Their Quality of Life. Sensors 2021, 21, 517 .
AMA StyleIlia Adami, Michalis Foukarakis, Stavroula Ntoa, Nikolaos Partarakis, Nikolaos Stefanakis, George Koutras, Themistoklis Kutsuras, Danai Ioannidi, Xenophon Zabulis, Constantine Stephanidis. Monitoring Health Parameters of Elders to Support Independent Living and Improve Their Quality of Life. Sensors. 2021; 21 (2):517.
Chicago/Turabian StyleIlia Adami; Michalis Foukarakis; Stavroula Ntoa; Nikolaos Partarakis; Nikolaos Stefanakis; George Koutras; Themistoklis Kutsuras; Danai Ioannidi; Xenophon Zabulis; Constantine Stephanidis. 2021. "Monitoring Health Parameters of Elders to Support Independent Living and Improve Their Quality of Life." Sensors 21, no. 2: 517.
A wide spectrum of digital data are becoming available to researchers and industries interested in the recording, documentation, recognition, and reproduction of human activities. In this work, we propose an approach for understanding and articulating human motion recordings into multimodal datasets and VR demonstrations of actions and activities relevant to traditional crafts. To implement the proposed approach, we introduce Animation Studio (AnimIO) that enables visualisation, editing, and semantic annotation of pertinent data. AnimIO is compatible with recordings acquired by Motion Capture (MoCap) and Computer Vision. Using AnimIO, the operator can isolate segments from multiple synchronous recordings and export them in multimodal animation files. AnimIO can be used to isolate motion segments that refer to individual craft actions, as described by practitioners. The proposed approach has been iteratively designed for use by non-experts in the domain of 3D motion digitisation.
Nikolaos Partarakis; Xenophon Zabulis; Antonis Chatziantoniou; Nikolaos Patsiouras; Ilia Adami. An Approach to the Creation and Presentation of Reference Gesture Datasets, for the Preservation of Traditional Crafts. Applied Sciences 2020, 10, 7325 .
AMA StyleNikolaos Partarakis, Xenophon Zabulis, Antonis Chatziantoniou, Nikolaos Patsiouras, Ilia Adami. An Approach to the Creation and Presentation of Reference Gesture Datasets, for the Preservation of Traditional Crafts. Applied Sciences. 2020; 10 (20):7325.
Chicago/Turabian StyleNikolaos Partarakis; Xenophon Zabulis; Antonis Chatziantoniou; Nikolaos Patsiouras; Ilia Adami. 2020. "An Approach to the Creation and Presentation of Reference Gesture Datasets, for the Preservation of Traditional Crafts." Applied Sciences 10, no. 20: 7325.
$Objective:$ In-vivo assessment of small vessels can promote accurate diagnosis and monitoring of diseases related to vasculopathy, such as hypertension and diabetes. The eye provides a unique, open, and accessible window for directly imaging small vessels in the retina with non-invasive techniques, such as fundoscopy. In this context, accurate registration of retinal images is of paramount importance in the comparison of vessel measurements from original and follow-up examinations, which is required for monitoring the disease and its treatment. At the same time, retinal registration exhibits a range of challenges due to the curved shape of the retina and the modification of imaged tissue across examinations. Thereby, the objective is to improve the state-of-the-art in the accuracy of retinal image registration.
Carlos Hernandez-Matas; Xenophon Zabulis; Antonis A. Argyros. REMPE: Registration of Retinal Images Through Eye Modelling and Pose Estimation. IEEE Journal of Biomedical and Health Informatics 2020, 24, 3362 -3373.
AMA StyleCarlos Hernandez-Matas, Xenophon Zabulis, Antonis A. Argyros. REMPE: Registration of Retinal Images Through Eye Modelling and Pose Estimation. IEEE Journal of Biomedical and Health Informatics. 2020; 24 (12):3362-3373.
Chicago/Turabian StyleCarlos Hernandez-Matas; Xenophon Zabulis; Antonis A. Argyros. 2020. "REMPE: Registration of Retinal Images Through Eye Modelling and Pose Estimation." IEEE Journal of Biomedical and Health Informatics 24, no. 12: 3362-3373.
This work regards the digital representation of tangible and intangible dimensions of heritage crafts, towards craft preservation. Based on state-of-the-art digital documentation, knowledge representation and narrative creation approach are presented. Craft presentation methods that use the represented content to provide accurate, intuitive, engaging, and educational ways for HC presentation and appreciation are proposed. The proposed methods aim to contribute to HC preservation, by adding value to the cultural visit, before, and after it.
Xenophon Zabulis; Carlo Meghini; Nikolaos Partarakis; Cynthia Beisswenger; Arnaud Dubois; Maria Fasoula; Vito Nitti; Stavroula Ntoa; Ilia Adami; Antonios Chatziantoniou; Valentina Bartalesi; Daniele Metilli; Nikolaos Stivaktakis; Nikolaos Patsiouras; Paraskevi Doulgeraki; Effie Karuzaki; Evropi Stefanidi; Ammar Qammaz; Danae Kaplanidi; Ilka Neumann-Janßen; Ulrike Denter; Hansgeorg Hauser; Argyro Petraki; Ioannis Stivaktakis; Eleni Mantinaki; Anastasia Rigaki; George Galanakis. Representation and Preservation of Heritage Crafts. Sustainability 2020, 12, 1461 .
AMA StyleXenophon Zabulis, Carlo Meghini, Nikolaos Partarakis, Cynthia Beisswenger, Arnaud Dubois, Maria Fasoula, Vito Nitti, Stavroula Ntoa, Ilia Adami, Antonios Chatziantoniou, Valentina Bartalesi, Daniele Metilli, Nikolaos Stivaktakis, Nikolaos Patsiouras, Paraskevi Doulgeraki, Effie Karuzaki, Evropi Stefanidi, Ammar Qammaz, Danae Kaplanidi, Ilka Neumann-Janßen, Ulrike Denter, Hansgeorg Hauser, Argyro Petraki, Ioannis Stivaktakis, Eleni Mantinaki, Anastasia Rigaki, George Galanakis. Representation and Preservation of Heritage Crafts. Sustainability. 2020; 12 (4):1461.
Chicago/Turabian StyleXenophon Zabulis; Carlo Meghini; Nikolaos Partarakis; Cynthia Beisswenger; Arnaud Dubois; Maria Fasoula; Vito Nitti; Stavroula Ntoa; Ilia Adami; Antonios Chatziantoniou; Valentina Bartalesi; Daniele Metilli; Nikolaos Stivaktakis; Nikolaos Patsiouras; Paraskevi Doulgeraki; Effie Karuzaki; Evropi Stefanidi; Ammar Qammaz; Danae Kaplanidi; Ilka Neumann-Janßen; Ulrike Denter; Hansgeorg Hauser; Argyro Petraki; Ioannis Stivaktakis; Eleni Mantinaki; Anastasia Rigaki; George Galanakis. 2020. "Representation and Preservation of Heritage Crafts." Sustainability 12, no. 4: 1461.
Future autonomous spacecraft rendezvous with uncooperative or unprepared objects will be enabled by visionbased navigation, which imposes great computational challenges. Targeting short duration missions in low Earth orbit, this paper develops high-performance avionics supporting custom computer vision algorithms of increased complexity for satellite pose tracking. At algorithmic level, we track 6D pose by rendering a depth image from an object mesh model and robustly matching edges detected in the depth and intensity images. At system level, we devise an architecture to exploit the structure of commercial System-on-Chip FPGAs, i.e., Zynq7000, and the benefits of tightly coupling VHDL accelerators with CPU-based functions. At implementation level, we employ our custom HW/SW codesign methodology and an elaborate combination of digital circuit design techniques to optimize and map efficiently all functions to a compact embedded device. Providing significant performance per Watt improvement, the resulting VBN system achieves a throughput of 10–14 FPS for 1 Mpixel images, with only 4.3 Watts mean power and 1U size, while tracking ENVISAT in real-time with only 0.5% mean positional error.
George Lentaris; Ioannis Stratakos; Ioannis Stamoulias; Dimitrios Soudris; Manolis Lourakis; Xenophon Zabulis. High-Performance Vision-Based Navigation on SoC FPGA for Spacecraft Proximity Operations. IEEE Transactions on Circuits and Systems for Video Technology 2019, 30, 1188 -1202.
AMA StyleGeorge Lentaris, Ioannis Stratakos, Ioannis Stamoulias, Dimitrios Soudris, Manolis Lourakis, Xenophon Zabulis. High-Performance Vision-Based Navigation on SoC FPGA for Spacecraft Proximity Operations. IEEE Transactions on Circuits and Systems for Video Technology. 2019; 30 (4):1188-1202.
Chicago/Turabian StyleGeorge Lentaris; Ioannis Stratakos; Ioannis Stamoulias; Dimitrios Soudris; Manolis Lourakis; Xenophon Zabulis. 2019. "High-Performance Vision-Based Navigation on SoC FPGA for Spacecraft Proximity Operations." IEEE Transactions on Circuits and Systems for Video Technology 30, no. 4: 1188-1202.
Evidence suggests that increased salt consumption induces blood pressure- (BP) mediated organ damage, yet it remains unclear whether it reflects a generalized micro- and macrovascular malfunction independent of BP. We studied 197 newly diagnosed and never-treated individuals with hypertension, intermediate hypertensive phenotypes, and normal BP, classified by use of 24-hour ambulatory BP monitoring. Sodium excretion and microalbuminuria were estimated in 24-hour urine samples, dermal capillary density was estimated from capillaroscopy, and arterial stiffness was estimated with pulse wave velocity (PWV) and augmentation index (AIx). Sodium excretion correlated with microalbuminuria (p<0.001) and 24-hour and day- and nighttime systolic BP, but not with office blood pressure, arterial stiffness, or capillary density. In the multivariate analysis, the association with microalbuminuria was maintained (p=0.007). In a population free from the long-standing effects of hypertension, increased salt intake appears to be associated with early signs of vascular kidney damage, rather than a diffuse micro- and macrovascular impairment.
Areti Triantafyllou; Panagiota Anyfanti; Eugenia Gkaliagkousi; Xenophon Zabulis; Anastasios Vamvakis; Vasileios Gkolias; Konstantinos Petidis; Spyros Aslanidis; Stella Douma. Association of Urinary Sodium Excretion with Vascular Damage: A Local Kidney Effect, Rather Than a Marker of Generalized Vascular Impairment. International Journal of Hypertension 2018, 2018, 1 -7.
AMA StyleAreti Triantafyllou, Panagiota Anyfanti, Eugenia Gkaliagkousi, Xenophon Zabulis, Anastasios Vamvakis, Vasileios Gkolias, Konstantinos Petidis, Spyros Aslanidis, Stella Douma. Association of Urinary Sodium Excretion with Vascular Damage: A Local Kidney Effect, Rather Than a Marker of Generalized Vascular Impairment. International Journal of Hypertension. 2018; 2018 ():1-7.
Chicago/Turabian StyleAreti Triantafyllou; Panagiota Anyfanti; Eugenia Gkaliagkousi; Xenophon Zabulis; Anastasios Vamvakis; Vasileios Gkolias; Konstantinos Petidis; Spyros Aslanidis; Stella Douma. 2018. "Association of Urinary Sodium Excretion with Vascular Damage: A Local Kidney Effect, Rather Than a Marker of Generalized Vascular Impairment." International Journal of Hypertension 2018, no. : 1-7.
Objective Increased urinary albumin excretion (UAE) is a marker of generalized vascular damage in high cardiovascular risk patients. However, it remains unknown whether it corresponds to a state of diffuse vasculopathy in high‐risk patients with rheumatoid arthritis (RA). Methods UAE was estimated in 24‐hour urine samples in RA and non‐RA individuals. Retinal arteriolar and venular diameters were calculated from retinal images with computerized software. Subendocardial viability ratio was estimated as an index of microvascular coronary perfusion with applanation tonometry. Dermal capillary density was measured from images obtained with nailfold capillaroscopy, using specifically designed software. Results In a total of 111 individuals, neither UAE [5.1 (2.8–10.8) vs 6.5 (3.0–11.7) mg/24h] nor prevalence of microalbuminuria (11.0 vs 8.1%) significantly differed between patients (n=74) and controls (n=37). In the RA group, UAE was not significantly associated with inflammation, nor with any of the studied microvascular indices of the retinal microvasculature, the coronary microcirculation, and the dermal capillary network. Conclusion Among RA patients, UAE was not associated with markers of vasculopathy in distal microvascular beds. Increased UAE in RA might be primarily considered as a manifestation of localized, compromised function of the renal microvasculature, rather than a marker of generalized microvascular impairment. This article is protected by copyright. All rights reserved.
Panagiota Anyfanti; Areti Triantafyllou; Eugenia Gkaliagkousi; Xenophon Zabulis; Panagiotis Dolgyras; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. Urinary albumin excretion in rheumatoid arthritis is not associated with markers of vasculopathy in distal microvascular beds. Microcirculation 2018, 26, e12514 .
AMA StylePanagiota Anyfanti, Areti Triantafyllou, Eugenia Gkaliagkousi, Xenophon Zabulis, Panagiotis Dolgyras, Vasiliki Galanopoulou, Spyros Aslanidis, Stella Douma. Urinary albumin excretion in rheumatoid arthritis is not associated with markers of vasculopathy in distal microvascular beds. Microcirculation. 2018; 26 (1):e12514.
Chicago/Turabian StylePanagiota Anyfanti; Areti Triantafyllou; Eugenia Gkaliagkousi; Xenophon Zabulis; Panagiotis Dolgyras; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. 2018. "Urinary albumin excretion in rheumatoid arthritis is not associated with markers of vasculopathy in distal microvascular beds." Microcirculation 26, no. 1: e12514.
A new software tool is developed for droplet image analysis for the study of wetting of solid substrates. The tool extracts information exclusively from images and does not require the use of any properties of the system. Moreover, its applicability covers both axisymmetric and non-axisymmetric droplets. The developed software processes independently droplet images taken from side and top perspectives. Processing of side-view images is made by polynomial fitting to the droplet shape and provides important 2D geometrical features such as contact angles, length, height, contact point coordinates and contour outline. The analysis of top-view images is achieved through active contours (snakes) and yields droplet dimensions, centroid position and contour outline. The combination of synchronized side and top images provides the reconstruction of the droplet 3D shape by means of slices of circular arc shape, which allows estimation of droplet volume and of the distribution of contact angles along its perimeter. The above is an important feature that has not been delivered by other software tools. Experimental results to support the applicability of the new tool are presented for two distinct substrates having different surface properties (glass and Teflon).
Inmaculada Ríos-López; Polykarpos Karamaoynas; Xenophon Zabulis; Margaritis Kostoglou; Thodoris D. Karapantsios. Image analysis of axisymmetric droplets in wetting experiments: A new tool for the study of 3D droplet geometry and droplet shape reconstruction. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 553, 660 -671.
AMA StyleInmaculada Ríos-López, Polykarpos Karamaoynas, Xenophon Zabulis, Margaritis Kostoglou, Thodoris D. Karapantsios. Image analysis of axisymmetric droplets in wetting experiments: A new tool for the study of 3D droplet geometry and droplet shape reconstruction. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2018; 553 ():660-671.
Chicago/Turabian StyleInmaculada Ríos-López; Polykarpos Karamaoynas; Xenophon Zabulis; Margaritis Kostoglou; Thodoris D. Karapantsios. 2018. "Image analysis of axisymmetric droplets in wetting experiments: A new tool for the study of 3D droplet geometry and droplet shape reconstruction." Colloids and Surfaces A: Physicochemical and Engineering Aspects 553, no. : 660-671.
Dimitris Grammenos; Xenophon Zabulis; Chatziantoniou Antonis; Zinovia Stefanidi; Ilia Adami; Vassiliki Neroutsou. COIN-O-RAMA. Proceedings of the 11th PErvasive Technologies Related to Assistive Environments Conference 2018, 38 -45.
AMA StyleDimitris Grammenos, Xenophon Zabulis, Chatziantoniou Antonis, Zinovia Stefanidi, Ilia Adami, Vassiliki Neroutsou. COIN-O-RAMA. Proceedings of the 11th PErvasive Technologies Related to Assistive Environments Conference. 2018; ():38-45.
Chicago/Turabian StyleDimitris Grammenos; Xenophon Zabulis; Chatziantoniou Antonis; Zinovia Stefanidi; Ilia Adami; Vassiliki Neroutsou. 2018. "COIN-O-RAMA." Proceedings of the 11th PErvasive Technologies Related to Assistive Environments Conference , no. : 38-45.
The Tourism Office of the city of Heraklion is a truly original facility that provides visitors with novel ways to access information through the use of modern technologies and innovative interactive systems developed by ICS-FORTH. This paper presents the innovative technologies employed at the tourist information office in order to enhance the information provision capacity of this type of facility in conjunction with traditional approaches, such as printed information material and human operated information provision. The info-point of Heraklion deploys a mixture of systems that augment the visiting experience while providing information through kinaesthetic interaction, Mixed Reality and play.
Nikolaos Partarakis; George Margetis; Emmanouil Zidianakis; Michalis Sifakis; Giannis Drossis; Chryssi Birliraki; Antonis Chatziantoniou; Vassiliki Neroutsou; Spiros Paparoulis; Thanasis Toutountzis; Panagiotis Koutlemanis; Xenophon Zabulis; Stavroula Ntoa; Dimitris Grammenos; Emmanouil Apostolakis; Emmanouil Stamatakis; Margherita Antona; Constantine Stephanidis. Interactive City Information Point: Your Guide to Heraklion City. Programmieren für Ingenieure und Naturwissenschaftler 2018, 204 -212.
AMA StyleNikolaos Partarakis, George Margetis, Emmanouil Zidianakis, Michalis Sifakis, Giannis Drossis, Chryssi Birliraki, Antonis Chatziantoniou, Vassiliki Neroutsou, Spiros Paparoulis, Thanasis Toutountzis, Panagiotis Koutlemanis, Xenophon Zabulis, Stavroula Ntoa, Dimitris Grammenos, Emmanouil Apostolakis, Emmanouil Stamatakis, Margherita Antona, Constantine Stephanidis. Interactive City Information Point: Your Guide to Heraklion City. Programmieren für Ingenieure und Naturwissenschaftler. 2018; ():204-212.
Chicago/Turabian StyleNikolaos Partarakis; George Margetis; Emmanouil Zidianakis; Michalis Sifakis; Giannis Drossis; Chryssi Birliraki; Antonis Chatziantoniou; Vassiliki Neroutsou; Spiros Paparoulis; Thanasis Toutountzis; Panagiotis Koutlemanis; Xenophon Zabulis; Stavroula Ntoa; Dimitris Grammenos; Emmanouil Apostolakis; Emmanouil Stamatakis; Margherita Antona; Constantine Stephanidis. 2018. "Interactive City Information Point: Your Guide to Heraklion City." Programmieren für Ingenieure und Naturwissenschaftler , no. : 204-212.
This paper presents an Ambient Intelligence infrastructure that fuses state-of-the-art technologies and related applications with digital cultural resources to deliver interactive and immersive user encounters through on-site Virtual Exhibitions (VEs) which respond to the demands of ‘new museology’. The practical exploitation of the concept is presented through the reformation of the exhibition spaces of the Archaeological Museum of Heraklion which is one of the most important Greek museums hosting representative artefacts from all the periods of Cretan prehistory and ancient history, covering a chronological span of over 5,500 years from the Neolithic period to Roman times.
Nikolaos Partarakis; Eirini Kontaki; Emmanouil Zidianakis; Giannis Drossis; Chryssi Birliraki; George Metaxakis; Alexandra Barka; Vaggelis Poutouris; George Mathioudakis; Ioanna Zidianaki; Antonis Chatziantoniou; Panagiotis Koutlemanis; Xenophon Zabulis; George Margetis; Dimitris Grammenos; Emmanouil Apostolakis; Emmanouil Stamatakis; Giorgos Paparoulis; Margherita Antona; Constantine Stephanidis. Digital Heritage Technology at the Archaeological Museum of Heraklion. Programmieren für Ingenieure und Naturwissenschaftler 2018, 196 -203.
AMA StyleNikolaos Partarakis, Eirini Kontaki, Emmanouil Zidianakis, Giannis Drossis, Chryssi Birliraki, George Metaxakis, Alexandra Barka, Vaggelis Poutouris, George Mathioudakis, Ioanna Zidianaki, Antonis Chatziantoniou, Panagiotis Koutlemanis, Xenophon Zabulis, George Margetis, Dimitris Grammenos, Emmanouil Apostolakis, Emmanouil Stamatakis, Giorgos Paparoulis, Margherita Antona, Constantine Stephanidis. Digital Heritage Technology at the Archaeological Museum of Heraklion. Programmieren für Ingenieure und Naturwissenschaftler. 2018; ():196-203.
Chicago/Turabian StyleNikolaos Partarakis; Eirini Kontaki; Emmanouil Zidianakis; Giannis Drossis; Chryssi Birliraki; George Metaxakis; Alexandra Barka; Vaggelis Poutouris; George Mathioudakis; Ioanna Zidianaki; Antonis Chatziantoniou; Panagiotis Koutlemanis; Xenophon Zabulis; George Margetis; Dimitris Grammenos; Emmanouil Apostolakis; Emmanouil Stamatakis; Giorgos Paparoulis; Margherita Antona; Constantine Stephanidis. 2018. "Digital Heritage Technology at the Archaeological Museum of Heraklion." Programmieren für Ingenieure und Naturwissenschaftler , no. : 196-203.
Objective Capillary rarefaction is observed in various cardiovascular diseases, yet it remains understudied in RA, a chronic inflammatory disease accompanied by excess cardiovascular risk. We quantified capillary density in RA patients and explored potential associations with macrocirculatory disorders, inflammation and cardiovascular risk. Methods Dermal capillary density was assessed with nailfold capillaroscopy in RA and non‐RA individuals, using specifically designed semiautomated software. Macrocirculation assessments included large artery stiffening, evaluated with PWV, and myocardial blood flow, calculated as cardiac index from impedance cardiography. Cardiovascular risk score was estimated from the Framingham Heart Study. Results The number of capillaries per visual field was lower in patients (n=99) compared to controls (n=35) (132.6±30.3 vs 152.9±25.2, p=0.001). In the RA group, capillary density negatively correlated with CRP and PWV, and positively with HDL and cardiac index. In the multivariate analysis, CRP independently predicted capillary rarefaction (p=0.044). Capillary density significantly correlated with cardiovascular risk, even after adjustment for inflammation (p=0.030). Conclusion Capillary rarefaction appears pronounced in RA and correlates with lower cardiac output, increased arterial stiffness and cardiovascular risk. However, the associations with macrocirculatory disorders may be obscured by inflammation, which appears as the major contributor to capillary rarefaction in RA. This article is protected by copyright. All rights reserved.
Panagiota Anyfanti; Eugenia Gkaliagkousi; Areti Triantafyllou; Xenophon Zabulis; Panagiotis Dolgyras; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. Dermal capillary rarefaction as a marker of microvascular damage in patients with rheumatoid arthritis: Association with inflammation and disorders of the macrocirculation. Microcirculation 2018, 25, e12451 .
AMA StylePanagiota Anyfanti, Eugenia Gkaliagkousi, Areti Triantafyllou, Xenophon Zabulis, Panagiotis Dolgyras, Vasiliki Galanopoulou, Spyros Aslanidis, Stella Douma. Dermal capillary rarefaction as a marker of microvascular damage in patients with rheumatoid arthritis: Association with inflammation and disorders of the macrocirculation. Microcirculation. 2018; 25 (5):e12451.
Chicago/Turabian StylePanagiota Anyfanti; Eugenia Gkaliagkousi; Areti Triantafyllou; Xenophon Zabulis; Panagiotis Dolgyras; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. 2018. "Dermal capillary rarefaction as a marker of microvascular damage in patients with rheumatoid arthritis: Association with inflammation and disorders of the macrocirculation." Microcirculation 25, no. 5: e12451.
Quantification of retinal vessel morphology has emerged as a marker of cardiovascular health. We examined retinal microvascular diameters in RA, particularly in regard with systemic inflammation, subclinical atherosclerosis and cardiovascular risk. Retinal images from RA patients and controls were processed using computerized software, to obtain central retinal arteriolar (CRAE) and venular (CRVE) equivalent and arteriovenous ratio (AVR). Subclinical atherosclerosis was assessed with carotid intima-media thickness (cIMT), and 10-year risk of general cardiovascular disease was calculated. Both CRAE (78.8±8.9 vs 90.2±9.9 μm, p<0.001) and AVR (0.69±0.09 vs 0.81±0.09, p<0.001) were decreased in RA patients (n=87) compared to controls (n=46), whereas CRVE did not differ. Among RA patients, CRAE and AVR were inversely associated with both cIMT and C-reactive protein (CRP), whereas CRVE positively correlated with CRP (p<0.05 for all). CRAE additionally correlated with cardiovascular risk score (r=–0.396, p=0.001). In the multivariate analysis, cardiovascular risk was associated with CRAE; age with CRVE, while CRP independently predicted AVR. Our study shows decreased altered retinal microvascular morphology in RA patients. Inflammation appears as the biological link for the observed association between retinal microvascular abnormalities and subclinical atherosclerosis. Retinal arteriolar narrowing might play its own role in cardiovascular risk prediction in RA. This article is protected by copyright. All rights reserved.
Panagiota Anyfanti; Areti Triantafyllou; Eugenia Gkaliagkousi; Nikolaos Koletsos; Georgios Athanasopoulos; Xenophon Zabulis; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. Retinal vessel morphology in rheumatoid arthritis: Association with systemic inflammation, subclinical atherosclerosis, and cardiovascular risk. Microcirculation 2017, 24, e12417 .
AMA StylePanagiota Anyfanti, Areti Triantafyllou, Eugenia Gkaliagkousi, Nikolaos Koletsos, Georgios Athanasopoulos, Xenophon Zabulis, Vasiliki Galanopoulou, Spyros Aslanidis, Stella Douma. Retinal vessel morphology in rheumatoid arthritis: Association with systemic inflammation, subclinical atherosclerosis, and cardiovascular risk. Microcirculation. 2017; 24 (8):e12417.
Chicago/Turabian StylePanagiota Anyfanti; Areti Triantafyllou; Eugenia Gkaliagkousi; Nikolaos Koletsos; Georgios Athanasopoulos; Xenophon Zabulis; Vasiliki Galanopoulou; Spyros Aslanidis; Stella Douma. 2017. "Retinal vessel morphology in rheumatoid arthritis: Association with systemic inflammation, subclinical atherosclerosis, and cardiovascular risk." Microcirculation 24, no. 8: e12417.
The case of mixed-reality projector-camera systems is considered and, in particular, those which employ hand-held boards as interactive displays. This work focuses upon the accurate, robust, and timely detection and pose estimation of such boards, to achieve high-quality augmentation and interaction. The proposed approach operates a camera in the near infrared spectrum to filter out the optical projection from the sensory input. However, the monochromaticity of input restricts the use of color for the detection of boards. In this context, two methods are proposed. The first regards the pose estimation of boards which, being computationally demanding and frequently used by the system, is highly parallelized. The second uses this pose estimation method to detect and track boards, being efficient in the use of computational resources so that accurate results are provided in real-time. Accurate pose estimation facilitates touch detection upon designated areas on the boards and high-quality projection of visual content upon boards. An implementation of the proposed approach is extensively and quantitatively evaluated, as to its accuracy and efficiency. This evaluation, along with usability and pilot application investigations, indicate the suitability of the proposed approach for use in interactive, mixed-reality applications.
Panagiotis Koutlemanis; Xenophon Zabulis. Tracking of multiple planar projection boards for interactive mixed-reality applications. Multimedia Tools and Applications 2017, 77, 17457 -17487.
AMA StylePanagiotis Koutlemanis, Xenophon Zabulis. Tracking of multiple planar projection boards for interactive mixed-reality applications. Multimedia Tools and Applications. 2017; 77 (13):17457-17487.
Chicago/Turabian StylePanagiotis Koutlemanis; Xenophon Zabulis. 2017. "Tracking of multiple planar projection boards for interactive mixed-reality applications." Multimedia Tools and Applications 77, no. 13: 17457-17487.
Estimating the pose of orbiting satellites is a key prerequisite for supporting autonomous proximity operations in space. This work presents a monocular 3D tracking algorithm that tracks edges with the aid of an arbitrary 3D mesh model assumed to capture a satellite's shape. The proposed tracker propagates a pose hypothesis between successive frames, using it first to render a depth image and then refining it according to partial matches established between depth and intensity edges. Edge matching relies on fast, local 1D searches along the depth gradient direction. The tracker does not require any pre-processing of the 3D model nor does it make any assumptions regarding its characteristics, as is often the case for other approaches. It is also robust to parts of the tracked satellite being out of view, occluded, shadowed or visually undetected. Experimental results evaluating the accuracy of the tracker and comparing it with established techniques are also included.
Manolis Lourakis; Xenophon Zabulis. Model-based visual tracking of orbiting satellites using edges. 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2017, 3791 -3796.
AMA StyleManolis Lourakis, Xenophon Zabulis. Model-based visual tracking of orbiting satellites using edges. 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). 2017; ():3791-3796.
Chicago/Turabian StyleManolis Lourakis; Xenophon Zabulis. 2017. "Model-based visual tracking of orbiting satellites using edges." 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) , no. : 3791-3796.
This work regards an investigation of the accuracy of a state-of-the-art, keypoint-based retinal image registration approach, as to the type of keypoint features used to guide the registration process. The employed registration approach is a local method that incorporates the notion of a 3D retinal surface imaged from different viewpoints and has been shown, experimentally, to be more accurate than competing approaches. The correspondences obtained between SIFT, SURF, Harris-PIIFD and vessel bifurcations are studied, either individually or in combinations. The combination of SIFT features with vessel bifurcations was found to perform better than other combinations or any individual feature type, alone. The registration approach is also comparatively evaluated against representative methods of the state-of-the-art in retinal image registration, using a benchmark dataset that covers a broad range of cases regarding the overlap of the acquired images and the anatomical characteristics of the imaged retinas.
Carlos Hernandez-Matas; Xenophon Zabulis; Antonis Argyros. An experimental evaluation of the accuracy of keypoints-based retinal image registration. 2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) 2017, 2017, 377 -381.
AMA StyleCarlos Hernandez-Matas, Xenophon Zabulis, Antonis Argyros. An experimental evaluation of the accuracy of keypoints-based retinal image registration. 2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). 2017; 2017 ():377-381.
Chicago/Turabian StyleCarlos Hernandez-Matas; Xenophon Zabulis; Antonis Argyros. 2017. "An experimental evaluation of the accuracy of keypoints-based retinal image registration." 2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) 2017, no. : 377-381.
We introduce T-LESS, a new public dataset for estimating the 6D pose, i.e. translation and rotation, of texture-less rigid objects. The dataset features thirty industry-relevant objects with no significant texture and no discriminative color or reflectance properties. The objects exhibit symmetries and mutual similarities in shape and/or size. Compared to other datasets, a unique property is that some of the objects are parts of others. The dataset includes training and test images that were captured with three synchronized sensors, specifically a structured-light and a time-of-flight RGB-D sensor and a high-resolution RGB camera. There are approximately 39K training and 10K test images from each sensor. Additionally, two types of 3D models are provided for each object, i.e. a manually created CAD model and a semi-automatically reconstructed one. Training images depict individual objects against a black background. Test images originate from twenty test scenes having varying complexity, which increases from simple scenes with several isolated objects to very challenging ones with multiple instances of several objects and with a high amount of clutter and occlusion. The images were captured from a systematically sampled view sphere around the object/scene, and are annotated with accurate ground truth 6D poses of all modeled objects. Initial evaluation results indicate that the state of the art in 6D object pose estimation has ample room for improvement, especially in difficult cases with significant occlusion. The T-LESS dataset is available online at cmp.felk.cvut.cz/t-less.
Tomas Hodan; Pavel Haluza; Stepan Obdrzalek; Jiri Matas; Manolis Lourakis; Xenophon Zabulis. T-LESS: An RGB-D Dataset for 6D Pose Estimation of Texture-less Objects. 2017, 1 .
AMA StyleTomas Hodan, Pavel Haluza, Stepan Obdrzalek, Jiri Matas, Manolis Lourakis, Xenophon Zabulis. T-LESS: An RGB-D Dataset for 6D Pose Estimation of Texture-less Objects. . 2017; ():1.
Chicago/Turabian StyleTomas Hodan; Pavel Haluza; Stepan Obdrzalek; Jiri Matas; Manolis Lourakis; Xenophon Zabulis. 2017. "T-LESS: An RGB-D Dataset for 6D Pose Estimation of Texture-less Objects." , no. : 1.