CEDD: Color and Edge Directivity Descriptor: A Compact Descriptor for Image Indexing and Retrieval. - Savvas A. Chatzichristofis; Yiannis S. Boutalis (ICVS, 2008)

Lire: lucene image retrieval: an extensible java CBIR library. - Mathias Lux; Savvas A. Chatzichristofis (ACM Multimedia, 2008)

FCTH: Fuzzy Color and Texture Histogram - A Low Level Feature for Accurate Image Retrieval. - Savvas A. Chatzichristofis; Yiannis S. Boutalis (WIAMIS, 2008)

Img(Rummager): An Interactive Content Based Image Retrieval System. - Savvas A. Chatzichristofis; Yiannis S. Boutalis; Mathias Lux (SISAP, 2009)

img(Anaktisi): A Web Content Based Image Retrieval System. - Konstantinos Zagoris; Savvas A. Chatzichristofis; Nikos Papamarkos; Yiannis S. Boutalis (SISAP, 2009)

Multimedia Search with Noisy Modalities: Fusion and Multistage Retrieval. - Avi Arampatzis; Savvas A. Chatzichristofis; Konstantinos Zagoris (CLEF (Notebook Papers/LABs/Workshops), 2010)

Combining Color and Spatial Color Distribution Information in a Fuzzy Rule Based Compact Composite Descriptor. - Savvas A. Chatzichristofis; Yiannis S. Boutalis; Mathias Lux (ICAART (Revised Selected Papers), 2010)

SpCD - Spatial Color Distribution Descriptor - A Fuzzy Rule based Compact Composite Descriptor Appropriate for Hand Drawn Color Sketches Retrieval. - Savvas A. Chatzichristofis; Yiannis S. Boutalis; Mathias Lux (ICAART (1), 2010)

Automatic Image Annotation and Retrieval Using the Joint Composite Descriptor. - Konstantinos Zagoris; Savvas A. Chatzichristofis; Nikos Papamarkos; Yiannis S. Boutalis (Panhellenic Conference on Informatics, 2010)

Late fusion of compact composite descriptorsfor retrieval from heterogeneous image databases. - Savvas A. Chatzichristofis; Avi Arampatzis (SIGIR, 2010)

www.MMRetrieval.net: a multimodal search engine. - Konstantinos Zagoris; Avi Arampatzis; Savvas A. Chatzichristofis (SISAP, 2010)

Accurate Image Retrieval Based on Compact Composite Descriptors and Relevance Feedback Information. - Savvas A. Chatzichristofis; Konstantinos Zagoris; Yiannis S. Boutalis; Nikos Papamarkos (Int. J. Pattern Recognit. Artif. Intell., 2010)

Content based radiology image retrieval using a fuzzy rule based scalable composite descriptor. - Savvas A. Chatzichristofis; Yiannis S. Boutalis (Multim. Tools Appl., 2010)

Description and retrieval of the visual content of multimedia information based on intelligent techniques - Savvas A. Chatzichristofis (2010)

DUTH at ImageCLEF 2011 Wikipedia Retrieval. - Avi Arampatzis; Konstantinos Zagoris; Savvas A. Chatzichristofis (CLEF (Notebook Papers/Labs/Workshop), 2011)

Dynamic Two-Stage Image Retrieval from Large Multimodal Databases. - Avi Arampatzis; Konstantinos Zagoris; Savvas A. Chatzichristofis (ECIR, 2011)

Fusion vs. Two-Stage for Multimodal Retrieval. - Avi Arampatzis; Konstantinos Zagoris; Savvas A. Chatzichristofis (ECIR, 2011)

Content Based Image Retrieval Using Visual-Words Distribution Entropy. - Savvas A. Chatzichristofis; Chryssanthi Iakovidou; Yiannis S. Boutalis (MIRAGE, 2011)

Video Summarization Using a Self-Growing and Self-Organized Neural Gas Network. - Dim P. Papadopoulos; Savvas A. Chatzichristofis; Nikos Papamarkos (MIRAGE, 2011)

Comparative Performance Evaluation of Image Descriptors over IEEE 802.11b Noisy Wireless Networks. - Evaggelos Chatzistavros; Savvas A. Chatzichristofis; Georgios Stamatelos; Konstantinos Zagoris (MUE, 2011)

Bag-of-visual-words vs global image descriptors on two-stage multimodal retrieval. - Savvas A. Chatzichristofis; Konstantinos Zagoris; Avi Arampatzis (SIGIR, 2011)

The TREC files: the (ground) truth is out there. - Savvas A. Chatzichristofis; Konstantinos Zagoris; Avi Arampatzis (SIGIR, 2011)

Text localization using standard deviation analysis of structure elements and support vector machines. - Konstantinos Zagoris; Savvas A. Chatzichristofis; Nikos Papamarkos (EURASIP J. Adv. Signal Process., 2011)

Image Encryption Using the Recursive Attributes of the eXclusive-OR Filter on Cellular Automata. - Savvas A. Chatzichristofis; Oge Marques; Mathias Lux; Yiannis S. Boutalis (ACRI, 2012)

SFly: Swarm of micro flying robots. - 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; et al. (IROS, 2012)

A Fuzzy Rank-Based Late Fusion Method for Image Retrieval. - Savvas A. Chatzichristofis; Konstantinos Zagoris; Yiannis S. Boutalis; Avi Arampatzis (MMM, 2012)

Autonomous navigation of teams of Unmanned Aerial or Underwater Vehicles for exploration of unknown static & dynamic environments. - Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Lefteris Doitsidis; João Borges de Sousa; Elias B. Kosmatopoulos (MED, 2013)

Distributed multi-robot coverage using micro aerial vehicles. - Alessandro Renzaglia; Lefteris Doitsidis; Savvas A. Chatzichristofis; Agostino Martinelli; Elias B. Kosmatopoulos (MED, 2013)

Golden retriever: a Java based open source image retrieval engine. - Lazaros T. Tsochatzidis; Chryssanthi Iakovidou; Savvas A. Chatzichristofis; Yiannis S. Boutalis (ACM Multimedia, 2013)

A Multi-Objective Exploration Strategy for Mobile Robots Under Operational Constraints. - Angelos Amanatiadis; Savvas A. Chatzichristofis; Konstantinos Charalampous; Lefteris Doitsidis; Elias B. Kosmatopoulos; Philippos Tsalides; Antonios Gasteratos; Stergios I. Roumeliotis (IEEE Access, 2013)

Automatic summarization and annotation of videos with lack of metadata information. - Dim P. Papadopoulos; Vicky S. Kalogeiton; Savvas A. Chatzichristofis; Nikos Papamarkos (Expert Syst. Appl., 2013)

Dynamic two-stage image retrieval from large multimedia databases. - Avi Arampatzis; Konstantinos Zagoris; Savvas A. Chatzichristofis (Inf. Process. Manag., 2013)

Co.Vi.Wo.: Color Visual Words Based on Non-Predefined Size Codebooks. - Savvas A. Chatzichristofis; Chryssanthi Iakovidou; Yiannis S. Boutalis; Oge Marques (IEEE Trans. Cybern., 2013)

Searching images with MPEG-7 (& MPEG-7-like) Powered Localized dEscriptors: The SIMPLE answer to effective Content Based Image Retrieval. - Chryssanthi Iakovidou; Nektarios Anagnostopoulos; Athanasios Ch. Kapoutsis; Yiannis S. Boutalis; Savvas A. Chatzichristofis (CBMI, 2014)

How Smart Are Smartphones?: Bridging the marketing and information technology gap. - Angelos Amanatiadis; Savvas A. Chatzichristofis (IEEE Consumer Electron. Mag., 2014)

Image Encryption Using the Recursive Attributes of the exclusive-OR Filter. - Savvas A. Chatzichristofis; Loukas Bampis; Oge Marques; Mathias Lux; Yiannis S. Boutalis (J. Cell. Autom., 2014)

Mean Normalized Retrieval Order (MNRO): a new content-based image retrieval performance measure. - Savvas A. Chatzichristofis; Chryssanthi Iakovidou; Yiannis S. Boutalis; Elli Angelopoulou (Multim. Tools Appl., 2014)

Vision-Controlled Micro Flying Robots: From System Design to Autonomous Navigation and Mapping in GPS-Denied Environments. - Davide Scaramuzza 001; 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; et al. (IEEE Robotics Autom. Mag., 2014)

Color and Edge Directivity Descriptor on GPGPU. - Chryssanthi Iakovidou; Loukas Bampis; Savvas A. Chatzichristofis; Yiannis S. Boutalis; Angelos Amanatiadis (PDP, 2015)

Localizing global descriptors for content-based image retrieval. - Chryssanthi Iakovidou; Nektarios Anagnostopoulos; Athanasios Ch. Kapoutsis; Yiannis S. Boutalis; Mathias Lux; Savvas A. Chatzichristofis (EURASIP J. Adv. Signal Process., 2015)

What, Where and How? Introducing pose manifolds for industrial object manipulation. - Rigas Kouskouridas; Angelos Amanatiadis; Savvas A. Chatzichristofis; Antonios Gasteratos (Expert Syst. Appl., 2015)

Content-based image retrieval over IEEE 802.11b noisy wireless networks. - Evaggelos Chatzistavros; Savvas A. Chatzichristofis; Konstantinos Zagoris; George Stamatelos (Int. J. Commun. Syst., 2015)

Hybrid Cellular Ants for Clustering Problems. - Nikolaos P. Bitsakidis; Savvas A. Chatzichristofis; Georgios Ch. Sirakoulis (Int. J. Unconv. Comput., 2015)

Image moment invariants as local features for content based image retrieval using the Bag-of-Visual-Words model. - Evangelos G. Karakasis; Angelos Amanatiadis; Antonios Gasteratos; Savvas A. Chatzichristofis (Pattern Recognit. Lett., 2015)

Real-time indexing for large image databases: color and edge directivity descriptor on GPU. - Loukas Bampis; Chryssanthi Iakovidou; Savvas A. Chatzichristofis; Yiannis S. Boutalis; Angelos Amanatiadis (J. Supercomput., 2015)

Real-time adaptive multi-robot exploration with application to underwater map construction. - Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Lefteris Doitsidis; João Borges de Sousa; José Pinto 001; José Braga; Elias B. Kosmatopoulos (Auton. Robots, 2016)

Dimensionality Reduction for Image Features using Deep Learning and Autoencoders. - Stefan Petscharnig; Mathias Lux; Savvas A. Chatzichristofis (CBMI, 2017)

CoMo: A Compact Composite Moment-Based Descriptor for Image Retrieval. - Sotiris A. Vassou; Nektarios Anagnostopoulos; Angelos Amanatiadis; Klitos Christodoulou; Savvas A. Chatzichristofis (CBMI, 2017)

Integrated Pest Control for the Olive-Fruit Fly: Remote Pest Monitoring and Optimized Bait-Sprays. - 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 (HAICTA, 2017)

Interactive social robots in special education. - Angelos Amanatiadis; Vassilis G. Kaburlasos; Christina Dardani; Savvas A. Chatzichristofis (ICCE-Berlin, 2017)

Continuously informed heuristic A∗-optimal path retrieval inside an unknown environment. - Athanasios Ch. Kapoutsis; Christina M. Malliou; Savvas A. Chatzichristofis; Elias B. Kosmatopoulos (SSRR, 2017)

Remote monitoring of the Bactrocera oleae (Gmelin) (Diptera: Tephritidae) population using an automated McPhail trap. - Lefteris Doitsidis; George N. Fouskitakis; Kyriaki N. Varikou; Iraklis I. Rigakis; Savvas A. Chatzichristofis; Androniki K. Papafilippaki; Athanasia E. Birouraki (Comput. Electron. Agric., 2017)

DARP: Divide Areas Algorithm for Optimal Multi-Robot Coverage Path Planning. - Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Elias B. Kosmatopoulos (J. Intell. Robotic Syst., 2017)

Autonomous Trajectory Design System for Mapping of Unknown Sea-floors using a team of AUVs. - Georgios Salavasidis; Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Panagiotis Michailidis 001; Elias B. Kosmatopoulos (ECC, 2018)

Making Sense of Fractions using E-learning Platforms - A Survey. - Dimitris Mastorodimos; Savvas A. Chatzichristofis; Athanassios Jimoyiannis; Klitos Christodoulou (INISTA, 2018)

A LoCATe-based visual place recognition system for mobile robotics and GPGPUs. - Loukas Bampis; Savvas A. Chatzichristofis; Chryssanthi Iakovidou; Angelos Amanatiadis; Yiannis S. Boutalis; Antonios Gasteratos (Concurr. Comput. Pract. Exp., 2018)

ParkChain: An IoT Parking Service Based on Blockchain. - Zinon Zinonos; Panayiotis Christodoulou; Andreas S. Andreou; Savvas A. Chatzichristofis (DCOSS, 2019)

A distributed, plug-n-play algorithm for multi-robot applications with a priori non-computable objective functions. - Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Elias B. Kosmatopoulos (Int. J. Robotics Res., 2019)

RandomBlocks: A Transparent, Verifiable Blockchain-based System for Random Numbers. - Klitos Christodoulou; Savvas A. Chatzichristofis; Georgios Ch. Sirakoulis; Panayiotis Christodoulou (J. Cell. Autom., 2019)

CoMo: a scale and rotation invariant compact composite moment-based descriptor for image retrieval. - Sotiris A. Vassou; Nektarios Anagnostopoulos; Klitos Christodoulou; Angelos Amanatiadis; Savvas A. Chatzichristofis (Multim. Tools Appl., 2019)

Composite Description Based on Salient Contours and Color Information for CBIR Tasks. - Chryssanthi Iakovidou; Nektarios Anagnostopoulos; Mathias Lux; Klitos Christodoulou; Yiannis S. Boutalis; Savvas A. Chatzichristofis (IEEE Trans. Image Process., 2019)

Health Information Exchange with Blockchain amid Covid-19-like Pandemics. - Klitos Christodoulou; Panayiotis Christodoulou; Zinon Zinonos; Elias G. Carayannis; Savvas A. Chatzichristofis (DCOSS, 2020)

A Fuzzy Rule-Based Control System for Fast Line-Following Robots. - G. Eleftheriou; Lefteris Doitsidis; Zinon Zinonos; Savvas A. Chatzichristofis (DCOSS, 2020)

Double Mobile sinks Architecture for WSN Data Gathering and Critical Events Detection. - Alá F. Khalifeh; Husam Abed; Khalid A. Darabkh; Savvas A. Chatzichristofis; Zinon Zinonos (DCOSS, 2020)

Educational Robotics: Platforms, Competitions and Expected Learning Outcomes. - Salomi Evripidou; Kyriakoula Georgiou; Lefteris Doitsidis; Angelos Amanatiadis; Zinon Zinonos; Savvas A. Chatzichristofis (IEEE Access, 2020)

Social Robots in Special Education: Creating Dynamic Interactions for Optimal Experience. - Angelos Amanatiadis; Vasileios G. Kaburlasos; Christina Dardani; Savvas A. Chatzichristofis; Athanasios C. Mitropoulos (IEEE Consumer Electron. Mag., 2020)

The Lagrangian remainder of Taylor's series, distinguishes O(f(x)) time complexities to polynomials or not. - Nikolaos P. Bakas; Elias B. Kosmatopoulos; Savvas A. Chatzichristofis (CoRR, 2020)

Investigating the Vision Transformer Model for Image Retrieval Tasks. - Socratis Gkelios; Yiannis S. Boutalis; Savvas A. Chatzichristofis (DCOSS, 2021)

Deep convolutional features for image retrieval. - Socratis Gkelios; Aphrodite Sophokleous; Spyridon Plakias; Yiannis S. Boutalis; Savvas A. Chatzichristofis (Expert Syst. Appl., 2021)

Introducing Algorithmic Thinking and Sequencing Using Tangible Robots. - Salomi Evripidou; Angelos Amanatiadis; Klitos Christodoulou; Savvas A. Chatzichristofis (IEEE Trans. Learn. Technol., 2021)

Selecting a Robotic Platform for Education. - Salomi Evripidou; Lefteris Doitsidis; George J. Tsinarakis; Zinon Zinonos; Savvas A. Chatzichristofis (ICCE, 2022)

How an Educational Robot Should Look Like: The Students' Perspective. - Georgios Kyprianou; Alexandra Karousou; Nikolaos Makris; Ilias T. Sarafis; Savvas A. Chatzichristofis; Angelos Amanatiadis (ICCE, 2022)

Educational Robotics in the Service of the Gestalt Similarity Principle. - Aphrodite Sophokleous; Angelos Amanatiadis; Socratis Gkelios; Savvas A. Chatzichristofis (ICCE, 2022)

Inverse Transform Sampling for Bibliometric Literature Analysis. - Nikolaos P. Bakas; Dionisios Koutsantonis; Vagelis Plevris; Andreas Langousis; Savvas A. Chatzichristofis (IISA, 2022)

An intelligent decision support model for staff selection based on the application of the Fuzzy Delphi Method and the Fuzzy Analytical Hierarchical Process. - Antonios Paraskevas; Konstantinos Zagoris; Savvas A. Chatzichristofis (IISA, 2022)

Grape Leaf Diseases Identification System Using Convolutional Neural Networks and LoRa Technology. - Zinon Zinonos; Socratis Gkelios; Alá F. Khalifeh; Diofantos G. Hadjimitsis; Yiannis S. Boutalis; Savvas A. Chatzichristofis (IEEE Access, 2022)

6th Place Solution to Google Universal Image Embedding. - Socratis Gkelios; Anestis Kastellos; Savvas A. Chatzichristofis (CoRR, 2022)

Towards the Achievement of Path Planning with Multi-robot Systems in Dynamic Environments. - Georgios Kyprianou; Lefteris Doitsidis; Savvas A. Chatzichristofis (J. Intell. Robotic Syst., 2022)

Autonomous Driving Through Deep Learning in Video Games: A Visual-Based Perception and Action Approach. - Anestis Kastellos; Socratis Gkelios; Savvas A. Chatzichristofis; Pericles Leng Cheng (DCOSS-IoT, 2023)

A ROS-Based Autonomous Vehicle Testbed for the Internet of Vehicles. - Nikolaos Sarantinoudis; George J. Tsinarakis; Lefteris Doitsidis; Savvas A. Chatzichristofis; George Arampatzis (DCOSS-IoT, 2023)

Integrating LLMs in Higher Education, Through Interactive Problem Solving and Tutoring: Algorithmic Approach and Use Cases. - Nikolaos P. Bakas; Maria Papadaki; Evgenia Vagianou; Ioannis T. Christou; Savvas A. Chatzichristofis (EMCIS (1), 2023)

Gamification Techniques and Feedback Mechanisms for Educational Robots. - Alexandra Karousou; Nikolaos Makris; Ilias T. Sarafis; Savvas A. Chatzichristofis; Angelos Amanatiadis (ICCE-Berlin, 2023)

Bin-Picking in the Industry 4.0 Era. - Georgios Kyprianou; Lefteris Doitsidis; Athanasios Ch. Kapoutsis; Zinon Zinonos; Savvas A. Chatzichristofis (ICCE, 2023)

Universal Image Embedding: Retaining and Expanding Knowledge With Multi-Domain Fine-Tuning. - Socratis Gkelios; Anestis Kastellos; Yiannis S. Boutalis; Savvas A. Chatzichristofis (IEEE Access, 2023)

Transforming Education with AI and Robotics: Potential, Perceptions, and Infrastructure Needs. - Marina Vasou; Georgios Kyprianou; Angelos Amanatiadis; Savvas A. Chatzichristofis (EMCIS (1), 2024)

Evaluating Student Acceptance and Engagement with a Humanoid Robot Tutor in a Formal Learning Environment. - Alexandra Karousou; Nikolaos Makris; Ilias T. Sarafis; Savvas A. Chatzichristofis; Angelos Amanatiadis (MED, 2024)

Synergizing Global and Local Strategies for Dynamic Project Management: An Advanced Machine Learning-Enhanced Framework. - George Sklias; Socratis Gkelios; Dimitrios Dimitriou; Maria Sartzetaki; Savvas A. Chatzichristofis (IEEE Access, 2024)

Improving time and energy efficiency in multi-UAV coverage operations by optimizing the UAVs' initial positions. - Aliki Stefanopoulou; Emmanuel K. Raptis; Savvas D. Apostolidis; Socratis Gkelios; Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Stefanos Vrochidis; Elias B. Kosmatopoulos (Int. J. Intell. Robotics Appl., 2024)

Correction to: Improving time and energy efficiency in multi‑UAV coverage operations by optimizing the UAVs' initial positions. - Aliki Stefanopoulou; Emmanuel K. Raptis; Savvas D. Apostolidis; Socratis Gkelios; Athanasios Ch. Kapoutsis; Savvas A. Chatzichristofis; Stefanos Vrochidis; Elias B. Kosmatopoulos (Int. J. Intell. Robotics Appl., 2025)