Savvas A. Chatzichristofis

Publication Activity (10 Years)

Years Active: 2008-2024
Publications (10 Years): 43

Top Topics

Image Retrieval

Educational Robotics

Top Venues

Publications

Alexandra Karousou, Nikolaos Makris, Ilias T. Sarafis, Savvas A. Chatzichristofis, Angelos Amanatiadis
Evaluating Student Acceptance and Engagement with a Humanoid Robot Tutor in a Formal Learning Environment. MED (2024)
George Sklias, Socratis Gkelios, Dimitrios Dimitriou, Maria Sartzetaki, Savvas A. Chatzichristofis
Synergizing Global and Local Strategies for Dynamic Project Management: An Advanced Machine Learning-Enhanced Framework. IEEE Access 12 (2024)
Anestis Kastellos, Socratis Gkelios, Savvas A. Chatzichristofis, Pericles Leng Cheng
Autonomous Driving Through Deep Learning in Video Games: A Visual-Based Perception and Action Approach. DCOSS-IoT (2023)
Georgios Kyprianou, Lefteris Doitsidis, Athanasios Ch. Kapoutsis, Zinon Zinonos, Savvas A. Chatzichristofis
Bin-Picking in the Industry 4.0 Era. ICCE (2023)
Nikolaos P. Bakas, Maria Papadaki, Evgenia Vagianou, Ioannis T. Christou, Savvas A. Chatzichristofis
Integrating LLMs in Higher Education, Through Interactive Problem Solving and Tutoring: Algorithmic Approach and Use Cases. EMCIS (1) (2023)
Nikolaos Sarantinoudis, George J. Tsinarakis, Lefteris Doitsidis, Savvas A. Chatzichristofis, George Arampatzis
A ROS-Based Autonomous Vehicle Testbed for the Internet of Vehicles. DCOSS-IoT (2023)
Socratis Gkelios, Anestis Kastellos, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Universal Image Embedding: Retaining and Expanding Knowledge With Multi-Domain Fine-Tuning. IEEE Access 11 (2023)
Alexandra Karousou, Nikolaos Makris, Ilias T. Sarafis, Savvas A. Chatzichristofis, Angelos Amanatiadis
Gamification Techniques and Feedback Mechanisms for Educational Robots. ICCE-Berlin (2023)
Zinon Zinonos, Socratis Gkelios, Alá F. Khalifeh, Diofantos G. Hadjimitsis, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Grape Leaf Diseases Identification System Using Convolutional Neural Networks and LoRa Technology. IEEE Access 10 (2022)
Antonios Paraskevas, Konstantinos Zagoris, Savvas A. Chatzichristofis
An intelligent decision support model for staff selection based on the application of the Fuzzy Delphi Method and the Fuzzy Analytical Hierarchical Process. IISA (2022)
Salomi Evripidou, Lefteris Doitsidis, George J. Tsinarakis, Zinon Zinonos, Savvas A. Chatzichristofis
Selecting a Robotic Platform for Education. ICCE (2022)
Aphrodite Sophokleous, Angelos Amanatiadis, Socratis Gkelios, Savvas A. Chatzichristofis
Educational Robotics in the Service of the Gestalt Similarity Principle. ICCE (2022)
Nikolaos P. Bakas, Dionisios Koutsantonis, Vagelis Plevris, Andreas Langousis, Savvas A. Chatzichristofis
Inverse Transform Sampling for Bibliometric Literature Analysis. IISA (2022)
Socratis Gkelios, A. Kastellos, Savvas A. Chatzichristofis
6th Place Solution to Google Universal Image Embedding. CoRR (2022)
Georgios Kyprianou, Alexandra Karousou, Nikolaos Makris, Ilias T. Sarafis, Savvas A. Chatzichristofis, Angelos Amanatiadis
How an Educational Robot Should Look Like: The Students' Perspective. ICCE (2022)
Georgios Kyprianou, Lefteris Doitsidis, Savvas A. Chatzichristofis
Towards the Achievement of Path Planning with Multi-robot Systems in Dynamic Environments. J. Intell. Robotic Syst. 104 (1) (2022)
Socratis Gkelios, Aphrodite Sophokleous, Spyridon Plakias, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Deep convolutional features for image retrieval. Expert Syst. Appl. 177 (2021)
Socratis Gkelios, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Investigating the Vision Transformer Model for Image Retrieval Tasks. DCOSS (2021)
Socratis Gkelios, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Investigating the Vision Transformer Model for Image Retrieval Tasks. CoRR (2021)
Salomi Evripidou, Angelos Amanatiadis, Klitos Christodoulou, Savvas A. Chatzichristofis
Introducing Algorithmic Thinking and Sequencing Using Tangible Robots. IEEE Trans. Learn. Technol. 14 (1) (2021)
Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Elias B. Kosmatopoulos
A distributed, plug-n-play algorithm for multi-robot applications with a priori non-computable objective functions. CoRR (2021)
Angelos Amanatiadis, Vasileios G. Kaburlasos, Christina Dardani, Savvas A. Chatzichristofis, Athanasios C. Mitropoulos
Social Robots in Special Education: Creating Dynamic Interactions for Optimal Experience. IEEE Consumer Electron. Mag. 9 (3) (2020)
G. Eleftheriou, Lefteris Doitsidis, Zinon Zinonos, Savvas A. Chatzichristofis
A Fuzzy Rule-Based Control System for Fast Line-Following Robots. DCOSS (2020)
Salomi Evripidou, Kyriakoula Georgiou, Lefteris Doitsidis, Angelos Amanatiadis, Zinon Zinonos, Savvas A. Chatzichristofis
Educational Robotics: Platforms, Competitions and Expected Learning Outcomes. IEEE Access 8 (2020)
Klitos Christodoulou, Panayiotis Christodoulou, Zinon Zinonos, Elias G. Carayannis, Savvas A. Chatzichristofis
Health Information Exchange with Blockchain amid Covid-19-like Pandemics. DCOSS (2020)
Nikolaos P. Bakas, Elias B. Kosmatopoulos, Savvas A. Chatzichristofis
The Lagrangian remainder of Taylor's series, distinguishes O(f(x)) time complexities to polynomials or not. CoRR (2020)
Alá F. Khalifeh, Husam Abed, Khalid A. Darabkh, Savvas A. Chatzichristofis, Zinon Zinonos
Double Mobile sinks Architecture for WSN Data Gathering and Critical Events Detection. DCOSS (2020)
Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Elias B. Kosmatopoulos
A distributed, plug-n-play algorithm for multi-robot applications with a priori non-computable objective functions. Int. J. Robotics Res. 38 (7) (2019)
Zinon Zinonos, Panayiotis Christodoulou, Andreas S. Andreou, Savvas A. Chatzichristofis
ParkChain: An IoT Parking Service Based on Blockchain. DCOSS (2019)
Sotiris A. Vassou, Nektarios Anagnostopoulos, Klitos Christodoulou, Angelos Amanatiadis, Savvas A. Chatzichristofis
CoMo: a scale and rotation invariant compact composite moment-based descriptor for image retrieval. Multim. Tools Appl. 78 (3) (2019)
Klitos Christodoulou, Savvas A. Chatzichristofis, Georgios Ch. Sirakoulis, Panayiotis Christodoulou
RandomBlocks: A Transparent, Verifiable Blockchain-based System for Random Numbers. J. Cell. Autom. 14 (5-6) (2019)
Chryssanthi Iakovidou, Nektarios Anagnostopoulos, Mathias Lux, Klitos Christodoulou, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Composite Description Based on Salient Contours and Color Information for CBIR Tasks. IEEE Trans. Image Process. 28 (6) (2019)
Georgios Salavasidis, Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Panagiotis Michailidis, Elias B. Kosmatopoulos
Autonomous Trajectory Design System for Mapping of Unknown Sea-floors using a team of AUVs. ECC (2018)
Dimitris Mastorodimos, Savvas A. Chatzichristofis, Athanassios Jimoyiannis, Klitos Christodoulou
Making Sense of Fractions using E-learning Platforms - A Survey. INISTA (2018)
Loukas Bampis, Savvas A. Chatzichristofis, Chryssanthi Iakovidou, Angelos Amanatiadis, Yiannis S. Boutalis, Antonios Gasteratos
A LoCATe-based visual place recognition system for mobile robotics and GPGPUs. Concurr. Comput. Pract. Exp. 30 (7) (2018)
Sotiris A. Vassou, Nektarios Anagnostopoulos, Angelos Amanatiadis, Klitos Christodoulou, Savvas A. Chatzichristofis
CoMo: A Compact Composite Moment-Based Descriptor for Image Retrieval. CBMI (2017)
George N. Fouskitakis, Lefteris Doitsidis, Kyriaki N. Varikou, Iraklis I. Rigakis, Ioannis Sarantopoulos, Athanasia Mpirouraki, Androniki K. Papafilippaki, Eleni Barbopoulou, Savvas A. Chatzichristofis, Kyriaki Maniadaki
Integrated Pest Control for the Olive-Fruit Fly: Remote Pest Monitoring and Optimized Bait-Sprays. HAICTA (2017)
Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Elias B. Kosmatopoulos
DARP: Divide Areas Algorithm for Optimal Multi-Robot Coverage Path Planning. J. Intell. Robotic Syst. 86 (3-4) (2017)
Angelos Amanatiadis, Vassilis G. Kaburlasos, Christina Dardani, Savvas A. Chatzichristofis
Interactive social robots in special education. ICCE-Berlin (2017)
Athanasios Ch. Kapoutsis, Christina M. Malliou, Savvas A. Chatzichristofis, Elias B. Kosmatopoulos
Continuously informed heuristic A∗-optimal path retrieval inside an unknown environment. SSRR (2017)
Stefan Petscharnig, Mathias Lux, Savvas A. Chatzichristofis
Dimensionality Reduction for Image Features using Deep Learning and Autoencoders. CBMI (2017)
Lefteris Doitsidis, George N. Fouskitakis, Kyriaki N. Varikou, Iraklis I. Rigakis, Savvas A. Chatzichristofis, Androniki K. Papafilippaki, Athanasia E. Birouraki
Remote monitoring of the Bactrocera oleae (Gmelin) (Diptera: Tephritidae) population using an automated McPhail trap. Comput. Electron. Agric. 137 (2017)
Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Lefteris Doitsidis, João Borges de Sousa, José Pinto, José Braga, Elias B. Kosmatopoulos
Real-time adaptive multi-robot exploration with application to underwater map construction. Auton. Robots 40 (6) (2016)
Chryssanthi Iakovidou, Nektarios Anagnostopoulos, Athanasios Ch. Kapoutsis, Yiannis S. Boutalis, Mathias Lux, Savvas A. Chatzichristofis
Localizing global descriptors for content-based image retrieval. EURASIP J. Adv. Signal Process. 2015 (2015)
Evaggelos Chatzistavros, Savvas A. Chatzichristofis, Konstantinos Zagoris, George Stamatelos
Content-based image retrieval over IEEE 802.11b noisy wireless networks. Int. J. Commun. Syst. 28 (8) (2015)
Rigas Kouskouridas, Angelos Amanatiadis, Savvas A. Chatzichristofis, Antonios Gasteratos
What, Where and How? Introducing pose manifolds for industrial object manipulation. Expert Syst. Appl. 42 (21) (2015)
Evangelos G. Karakasis, Angelos Amanatiadis, Antonios Gasteratos, Savvas A. Chatzichristofis
Image moment invariants as local features for content based image retrieval using the Bag-of-Visual-Words model. Pattern Recognit. Lett. 55 (2015)
Loukas Bampis, Chryssanthi Iakovidou, Savvas A. Chatzichristofis, Yiannis S. Boutalis, Angelos Amanatiadis
Real-time indexing for large image databases: color and edge directivity descriptor on GPU. J. Supercomput. 71 (3) (2015)
Nikolaos P. Bitsakidis, Savvas A. Chatzichristofis, Georgios Ch. Sirakoulis
Hybrid Cellular Ants for Clustering Problems. Int. J. Unconv. Comput. 11 (2) (2015)
Chryssanthi Iakovidou, Loukas Bampis, Savvas A. Chatzichristofis, Yiannis S. Boutalis, Angelos Amanatiadis
Color and Edge Directivity Descriptor on GPGPU. PDP (2015)
Savvas A. Chatzichristofis, Loukas Bampis, Oge Marques, Mathias Lux, Yiannis S. Boutalis
Image Encryption Using the Recursive Attributes of the exclusive-OR Filter. J. Cell. Autom. 9 (2-3) (2014)
Savvas A. Chatzichristofis, Chryssanthi Iakovidou, Yiannis S. Boutalis, Elli Angelopoulou
Mean Normalized Retrieval Order (MNRO): a new content-based image retrieval performance measure. Multim. Tools Appl. 70 (3) (2014)
Davide Scaramuzza, Michael Achtelik, Lefteris Doitsidis, Friedrich Fraundorfer, Elias B. Kosmatopoulos, Agostino Martinelli, Markus W. Achtelik, Margarita Chli, Savvas A. Chatzichristofis, Laurent Kneip, Daniel Gurdan, Lionel Heng, Gim Hee Lee, Simon Lynen, Marc Pollefeys, Alessandro Renzaglia, Roland Siegwart, Jan Carsten Stumpf, Petri Tanskanen, Chiara Troiani, Stephan Weiss, Lorenz Meier
Vision-Controlled Micro Flying Robots: From System Design to Autonomous Navigation and Mapping in GPS-Denied Environments. IEEE Robotics Autom. Mag. 21 (3) (2014)
Chryssanthi Iakovidou, Nektarios Anagnostopoulos, Athanasios Ch. Kapoutsis, Yiannis S. Boutalis, Savvas A. Chatzichristofis
Searching images with MPEG-7 (& MPEG-7-like) Powered Localized dEscriptors: The SIMPLE answer to effective Content Based Image Retrieval. CBMI (2014)
Angelos Amanatiadis, Savvas A. Chatzichristofis
How Smart Are Smartphones?: Bridging the marketing and information technology gap. IEEE Consumer Electron. Mag. 3 (4) (2014)
Athanasios Ch. Kapoutsis, Savvas A. Chatzichristofis, Lefteris Doitsidis, João Borges de Sousa, Elias B. Kosmatopoulos
Autonomous navigation of teams of Unmanned Aerial or Underwater Vehicles for exploration of unknown static & dynamic environments. MED (2013)
Alessandro Renzaglia, Lefteris Doitsidis, Savvas A. Chatzichristofis, Agostino Martinelli, Elias B. Kosmatopoulos
Distributed multi-robot coverage using micro aerial vehicles. MED (2013)
Avi Arampatzis, Konstantinos Zagoris, Savvas A. Chatzichristofis
Dynamic two-stage image retrieval from large multimedia databases. Inf. Process. Manag. 49 (1) (2013)
Lazaros T. Tsochatzidis, Chryssanthi Iakovidou, Savvas A. Chatzichristofis, Yiannis S. Boutalis
Golden retriever: a Java based open source image retrieval engine. ACM Multimedia (2013)
Angelos Amanatiadis, Savvas A. Chatzichristofis, Konstantinos Charalampous, Lefteris Doitsidis, Elias B. Kosmatopoulos, Philippos Tsalides, Antonios Gasteratos, Stergios I. Roumeliotis
A Multi-Objective Exploration Strategy for Mobile Robots Under Operational Constraints. IEEE Access 1 (2013)
Savvas A. Chatzichristofis, Chryssanthi Iakovidou, Yiannis S. Boutalis, Oge Marques
Co.Vi.Wo.: Color Visual Words Based on Non-Predefined Size Codebooks. IEEE Trans. Cybern. 43 (1) (2013)
Dim P. Papadopoulos, Vicky S. Kalogeiton, Savvas A. Chatzichristofis, Nikos Papamarkos
Automatic summarization and annotation of videos with lack of metadata information. Expert Syst. Appl. 40 (14) (2013)
Savvas A. Chatzichristofis, Oge Marques, Mathias Lux, Yiannis S. Boutalis
Image Encryption Using the Recursive Attributes of the eXclusive-OR Filter on Cellular Automata. ACRI (2012)
Savvas A. Chatzichristofis, Konstantinos Zagoris, Yiannis S. Boutalis, Avi Arampatzis
A Fuzzy Rank-Based Late Fusion Method for Image Retrieval. MMM (2012)
Markus Achtelik, Michael Achtelik, Yorick Brunet, Margarita Chli, Savvas A. Chatzichristofis, Jean-Dominique Decotignie, Klaus-Michael Doth, Friedrich Fraundorfer, Laurent Kneip, Daniel Gurdan, Lionel Heng, Elias B. Kosmatopoulos, Lefteris Doitsidis, Gim Hee Lee, Simon Lynen, Agostino Martinelli, Lorenz Meier, Marc Pollefeys, Damien Piguet, Alessandro Renzaglia, Davide Scaramuzza, Roland Siegwart, Jan Stumpf, Petri Tanskanen, Chiara Troiani, Stephan Weiss
SFly: Swarm of micro flying robots. IROS (2012)
Savvas A. Chatzichristofis, Konstantinos Zagoris, Avi Arampatzis
Bag-of-visual-words vs global image descriptors on two-stage multimodal retrieval. SIGIR (2011)
Dim P. Papadopoulos, Savvas A. Chatzichristofis, Nikos Papamarkos
Video Summarization Using a Self-Growing and Self-Organized Neural Gas Network. MIRAGE (2011)
Avi Arampatzis, Konstantinos Zagoris, Savvas A. Chatzichristofis
Fusion vs. Two-Stage for Multimodal Retrieval. ECIR (2011)
Evaggelos Chatzistavros, Savvas A. Chatzichristofis, Georgios Stamatelos, Konstantinos Zagoris
Comparative Performance Evaluation of Image Descriptors over IEEE 802.11b Noisy Wireless Networks. MUE (2011)
Konstantinos Zagoris, Savvas A. Chatzichristofis, Nikos Papamarkos
Text localization using standard deviation analysis of structure elements and support vector machines. EURASIP J. Adv. Signal Process. 2011 (2011)
Avi Arampatzis, Konstantinos Zagoris, Savvas A. Chatzichristofis
DUTH at ImageCLEF 2011 Wikipedia Retrieval. CLEF (Notebook Papers/Labs/Workshop) (2011)
Avi Arampatzis, Konstantinos Zagoris, Savvas A. Chatzichristofis
Dynamic Two-Stage Image Retrieval from Large Multimodal Databases. ECIR (2011)
Savvas A. Chatzichristofis, Chryssanthi Iakovidou, Yiannis S. Boutalis
Content Based Image Retrieval Using Visual-Words Distribution Entropy. MIRAGE (2011)
Savvas A. Chatzichristofis, Konstantinos Zagoris, Avi Arampatzis
The TREC files: the (ground) truth is out there. SIGIR (2011)
Savvas A. Chatzichristofis, Yiannis S. Boutalis
Content based radiology image retrieval using a fuzzy rule based scalable composite descriptor. Multim. Tools Appl. 46 (2-3) (2010)
Avi Arampatzis, Savvas A. Chatzichristofis, Konstantinos Zagoris
Multimedia Search with Noisy Modalities: Fusion and Multistage Retrieval. CLEF (Notebook Papers/LABs/Workshops) (2010)
Savvas A. Chatzichristofis, Yiannis S. Boutalis, Mathias Lux
Combining Color and Spatial Color Distribution Information in a Fuzzy Rule Based Compact Composite Descriptor. ICAART (Revised Selected Papers) (2010)
Savvas A. Chatzichristofis, Yiannis S. Boutalis, Mathias Lux
SpCD - Spatial Color Distribution Descriptor - A Fuzzy Rule based Compact Composite Descriptor Appropriate for Hand Drawn Color Sketches Retrieval. ICAART (1) (2010)
Konstantinos Zagoris, Savvas A. Chatzichristofis, Nikos Papamarkos, Yiannis S. Boutalis
Automatic Image Annotation and Retrieval Using the Joint Composite Descriptor. Panhellenic Conference on Informatics (2010)
Savvas A. Chatzichristofis, Avi Arampatzis
Late fusion of compact composite descriptorsfor retrieval from heterogeneous image databases. SIGIR (2010)
Savvas A. Chatzichristofis, Konstantinos Zagoris, Yiannis S. Boutalis, Nikos Papamarkos
Accurate Image Retrieval Based on Compact Composite Descriptors and Relevance Feedback Information. Int. J. Pattern Recognit. Artif. Intell. 24 (2) (2010)
Konstantinos Zagoris, Avi Arampatzis, Savvas A. Chatzichristofis
www.MMRetrieval.net: a multimodal search engine. SISAP (2010)
Konstantinos Zagoris, Savvas A. Chatzichristofis, Nikos Papamarkos, Yiannis S. Boutalis
img(Anaktisi): A Web Content Based Image Retrieval System. SISAP (2009)
Savvas A. Chatzichristofis, Yiannis S. Boutalis, Mathias Lux
Img(Rummager): An Interactive Content Based Image Retrieval System. SISAP (2009)
Savvas A. Chatzichristofis, Yiannis S. Boutalis
CEDD: Color and Edge Directivity Descriptor: A Compact Descriptor for Image Indexing and Retrieval. ICVS (2008)
Savvas A. Chatzichristofis, Yiannis S. Boutalis
FCTH: Fuzzy Color and Texture Histogram - A Low Level Feature for Accurate Image Retrieval. WIAMIS (2008)
Mathias Lux, Savvas A. Chatzichristofis
Lire: lucene image retrieval: an extensible java CBIR library. ACM Multimedia (2008)