Costas S. Tzafestas

Publication Activity (10 Years)

Years Active: 1995-2024
Publications (10 Years): 53

Top Topics

Active Exploration

Reinforcement Learning

Top Venues

Publications

Maximilian Maniacco, Costas S. Tzafestas, Angelika Peer
Straight Walking Gait Parameter Prediction with a Reduced Number of Sensors. MED (2024)
Ioannis Alamanos, George P. Moustris, Costas S. Tzafestas
Localization and Offline Mapping of High-Voltage Substations in Rough Terrain Using a Ground Vehicle. CoRR (2024)
Ioannis Alamanos, George P. Moustris, Costas S. Tzafestas
Localization and Offline Mapping of High-Voltage Substations in Rough Terrain Using a Ground Vehicle. MED (2024)
Stamatina C. Barakou, Costas S. Tzafestas, Kimon P. Valavanis
A Comparative Study of Real-Time Implementable Cooperative Aerial Manipulation Systems. CoRR (2024)
George Moustris, Costas S. Tzafestas, Konstantinos Konstantinidis
A long distance telesurgical demonstration on robotic surgery phantoms over 5G. Int. J. Comput. Assist. Radiol. Surg. 18 (9) (2023)
Paris Oikonomou, Athanasios Dometios, Mehdi Khamassi, Costas S. Tzafestas
Zero-shot model-free learning of periodic movements for a bio-inspired soft-robotic arm. Frontiers Robotics AI 10 (2023)
Athanasios C. Dometios, Costas S. Tzafestas
Interaction Control of a Robotic Manipulator With the Surface of Deformable Object. IEEE Trans. Robotics 39 (2) (2023)
George P. Moustris, Costas S. Tzafestas
Modelling and Analysis of a Parallel Double Delta Mechanism for Robotic Surgery. MED (2022)
Paris Oikonomou, Athanasios Dometios, Mehdi Khamassi, Costas S. Tzafestas
Reproduction of Human Demonstrations with a Soft-Robotic Arm based on a Library of Learned Probabilistic Movement Primitives. ICRA (2022)
Xanthi S. Papageorgiou, Athanasios C. Dometios, Costas S. Tzafestas
Towards a User Adaptive Assistive Robot: Learning from Demonstration Using Navigation Functions. IROS (2021)
Danai Efstathiou, Georgia Chalvatzaki, Athanasios Dometios, Dionisios Spiliopoulos, Costas S. Tzafestas
Deep Leg Tracking by Detection and Gait Analysis in 2D Range Data for Intelligent Robotic Assistants. IROS (2021)
George Moustris, Nikolaos Kardaris, Antigoni Tsiami, Georgia Chalvatzaki, Petros Koutras, Athanasios Dometios, Paris Oikonomou, Costas S. Tzafestas, Petros Maragos, Eleni Efthimiou, Xanthi S. Papageorgiou, Stavroula-Evita Fotinea, Yiannis Koumpouros, Anna Vacalopoulou, Effie Papageorgiou, Alexandra Karavasili, Foteini Koureta, Dimitris Dimou, Alexandros Nikolakakis, Konstantinos Karaiskos, Panagiotis Mavridis
The i-Walk Lightweight Assistive Rollator: First Evaluation Study. Frontiers Robotics AI 8 (2021)
Paris Oikonomou, Athanasios Dometios, Mehdi Khamassi, Costas S. Tzafestas
Task Driven Skill Learning in a Soft-Robotic Arm. IROS (2021)
Abolfazl Zaraki, Mehdi Khamassi, Luke Jai Wood, Gabriella Lakatos, Costas S. Tzafestas, Farshid Amirabdollahian, Ben Robins, Kerstin Dautenhahn
A Novel Reinforcement-Based Paradigm for Children to Teach the Humanoid Kaspar Robot. Int. J. Soc. Robotics 12 (3) (2020)
Paris Oikonomou, Mehdi Khamassi, Costas S. Tzafestas
. ICRA (2020)
George Moustris, Nikolaos Kardaris, Antigoni Tsiami, Georgia Chalvatzaki, Petros Koutras, Athanasios Dometios, Paris Oikonomou, Costas S. Tzafestas, Petros Maragos, Eleni Efthimiou, Xanthi S. Papageorgiou, Stavroula-Evita Fotinea, Yiannis Koumpouros, Anna Vacalopoulou, Alexandra Karavasili, Alexandros Nikolakakis, Konstantinos Karaiskos, Panagiotis Mavridis
The I-Walk Assistive Robot - A Multimodal Intelligent Robotic Rollator Providing Cognitive and Mobility Assistance to the Elderly and Motor-Impaired. HFR (2020)
Athanasia Zlatintsi, A. C. Dometios, Nikolaos Kardaris, Isidoros Rodomagoulakis, Petros Koutras, Xanthi S. Papageorgiou, Petros Maragos, Costas S. Tzafestas, Panagiotis Vartholomeos, Klaus Hauer, Christian Werner, Roberta Annicchiarico, Maria Giovanna Lombardi, Fulvia Adriano, Tamim Asfour, Angelo M. Sabatini, Cecilia Laschi, Matteo Cianchetti, Rafael López
I-Support: A robotic platform of an assistive bathing robot for the elderly population. Robotics Auton. Syst. 126 (2020)
Georgia Chalvatzaki, Petros Koutras, Antigoni Tsiami, Costas S. Tzafestas, Petros Maragos
i-Walk Intelligent Assessment System: Activity, Mobility, Intention, Communication. ECCV Workshops (4) (2020)
Georgia Chalvatzaki, Petros Koutras, Jack Hadfield, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
LSTM-based Network for Human Gait Stability Prediction in an Intelligent Robotic Rollator. ICRA (2019)
Petros Koutras, Georgia Chalvatzaki, Antigoni Tsiami, Alexandros Nikolakakis, Costas S. Tzafestas, Petros Maragos
Video Processing and Learning in Assistive Robotic Applications. ICIP (2019)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Petros Maragos, Costas S. Tzafestas
Learn to Adapt to Human Walking: A Model-Based Reinforcement Learning Approach for a Robotic Assistant Rollator. IEEE Robotics Autom. Lett. 4 (4) (2019)
Jack Hadfield, Georgia Chalvatzaki, Petros Koutras, Mehdi Khamassi, Costas S. Tzafestas, Petros Maragos
A Deep Learning Approach for Multi-View Engagement Estimation of Children in a Child-Robot Joint Attention Task. IROS (2019)
Mehdi Khamassi, Georgia Chalvatzaki, Theodore Tsitsimis, George Velentzas, Costas S. Tzafestas
A Framework for Robot Learning During Child-Robot Interaction with Human Engagement as Reward Signal. RO-MAN (2018)
Mehdi Khamassi, George Velentzas, Theodore Tsitsimis, Costas S. Tzafestas
Robot Fast Adaptation to Changes in Human Engagement During Simulated Dynamic Social Interaction With Active Exploration in Parameterized Reinforcement Learning. IEEE Trans. Cogn. Dev. Syst. 10 (4) (2018)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
Augmented Human State Estimation Using Interacting Multiple Model Particle Filters With Probabilistic Data Association. IEEE Robotics Autom. Lett. 3 (3) (2018)
George P. Moustris, Panagiotis Kyriakis, Costas S. Tzafestas
Feedback Equivalence Between Curve & Straight Line Tracking for Unmanned Aerial Vehicles. ECC (2018)
George Velentzas, Theodore Tsitsimis, Iñaki Rañó, Costas S. Tzafestas, Mehdi Khamassi
Adaptive reinforcement learning with active state-specific exploration for engagement maximization during simulated child-robot interaction. Paladyn J. Behav. Robotics 9 (1) (2018)
Athanasios C. Dometios, You Zhou, Xanthi S. Papageorgiou, Costas S. Tzafestas, Tamim Asfour
Vision-Based Online Adaptation of Motion Primitives to Dynamic Surfaces: Application to an Interactive Robotic Wiping Task. IEEE Robotics Autom. Lett. 3 (2) (2018)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Petros Maragos, Costas S. Tzafestas
User-Adaptive Human-Robot Formation Control for an Intelligent Robotic Walker Using Augmented Human State Estimation and Pathological Gait Characterization. IROS (2018)
Athanasia Zlatintsi, Isidoros Rodomagoulakis, Petros Koutras, A. C. Dometios, Vassilis Pitsikalis, Costas S. Tzafestas, Petros Maragos
Multimodal Signal Processing and Learning Aspects of Human-Robot Interaction for an Assistive Bathing Robot. ICASSP (2018)
Jack Hadfield, Georgia Chalvatzaki, Petros Koutras, Mehdi Khamassi, Costas S. Tzafestas, Petros Maragos
A Deep Learning Approach for Multi-View Engagement Estimation of Children in a Child-Robot Joint Attention task. CoRR (2018)
Jack Hadfield, Petros Koutras, Niki Efthymiou, Gerasimos Potamianos, Costas S. Tzafestas, Petros Maragos
Object Assembly Guidance in Child-Robot Interaction using RGB-D based 3D Tracking. IROS (2018)
Georgia Chalvatzaki, Petros Koutras, Jack Hadfield, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
On-line Human Gait Stability Prediction using LSTMs for the fusion of Deep-based Pose Estimation and LRF-based Augmented Gait State Estimation in an Intelligent Robotic Rollator. CoRR (2018)
Athanasia Zlatintsi, Isidoros Rodomagoulakis, Vassilis Pitsikalis, Petros Koutras, Nikolaos Kardaris, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
Social Human-Robot Interaction for the Elderly: Two Real-life Use Cases. HRI (Companion) (2017)
Xanthi S. Papageorgiou, Georgia Chalvatzaki, Athanasios Dometios, Costas S. Tzafestas, Petros Maragos
Intelligent Assistive Robotic Systems for the elderly: Two real-life use cases. PETRA (2017)
Athanasios C. Dometios, Xanthi S. Papageorgiou, Antonis Arvanitakis, Costas S. Tzafestas, Petros Maragos
Real-time end-effector motion behavior planning approach using on-line point-cloud data towards a user adaptive assistive bath robot. IROS (2017)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Costas S. Tzafestas
Towards a user-adaptive context-aware robotic walker with a pathological gait assessment system: First experimental study. IROS (2017)
Athanasia Zlatintsi, Isidoros Rodomagoulakis, Petros Koutras, A. C. Dometios, Vassilis Pitsikalis, Costas S. Tzafestas, Petros Maragos
Multimodal Signal Processing and Learning Aspects of Human-Robot Interaction for an Assistive Bathing Robot. CoRR (2017)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
Estimating double support in pathological gaits using an HMM-based analyzer for an intelligent robotic walker. RO-MAN (2017)
Mehdi Khamassi, George Velentzas, Theodore Tsitsimis, Costas S. Tzafestas
Active Exploration and Parameterized Reinforcement Learning Applied to a Simulated Human-Robot Interaction Task. IRC (2017)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos
Comparative experimental validation of human gait tracking algorithms for an intelligent robotic rollator. ICRA (2017)
Eleni Efthimiou, Stavroula-Evita Fotinea, Theodore Goulas, Maria Koutsombogera, Panagiotis Karioris, Anna Vacalopoulou, Isidoros Rodomagoulakis, Petros Maragos, Costas S. Tzafestas, Vassilis Pitsikalis, Yiannis Koumpouros, Alexandra Karavasili, Panagiotis Siavelis, Foteini Koureta, Despoina Alexopoulou
The MOBOT rollator human-robot interaction model and user evaluation process. SSCI (2016)
John N. Karigiannis, Costas S. Tzafestas
Model-free learning on robot kinematic chains using a nested multi-agent topology. J. Exp. Theor. Artif. Intell. 28 (6) (2016)
Georgia Chalvatzaki, Xanthi S. Papageorgiou, Christian Werner, Klaus Hauer, Costas S. Tzafestas, Petros Maragos
Experimental comparison of human gait tracking algorithms: Towards a context-aware mobility assistance robotic walker. MED (2016)
Xanthi S. Papageorgiou, Georgia Chalvatzaki, Konstantinos-Nektarios Lianos, Christian Werner, Klaus Hauer, Costas S. Tzafestas, Petros Maragos
Experimental validation of human pathological gait analysis for an assisted living intelligent robotic walker. BioRob (2016)
Riza Alp Güler, Nikolaos Kardaris, Siddhartha Chandra, Vassilis Pitsikalis, Christian Werner, Klaus Hauer, Costas S. Tzafestas, Petros Maragos, Iasonas Kokkinos
Human Joint Angle Estimation and Gesture Recognition for Assistive Robotic Vision. ECCV Workshops (2) (2016)
Athanasios C. Dometios, Xanthi S. Papageorgiou, Costas S. Tzafestas, Panagiotis Vartholomeos
Towards ICT-supported bath robots: Control architecture description and localized perception of user for robot motion planning. MED (2016)
George P. Moustris, Costas S. Tzafestas
Simplifying mobile robot tracking control through feedback equivalence. MED (2016)
Eleni Efthimiou, Stavroula-Evita Fotinea, Theodore Goulas, Athanasia-Lida Dimou, Maria Koutsombogera, Vassilis Pitsikalis, Petros Maragos, Costas S. Tzafestas
The MOBOT Platform - Showcasing Multimodality in Human-Assistive Robot Interaction. HCI (8) (2016)
George P. Moustris, Costas S. Tzafestas
Assistive front-following control of an intelligent robotic rollator based on a modified dynamic window planner. BioRob (2016)
Mehdi Khamassi, Costas S. Tzafestas
Active exploration in parameterized reinforcement learning. CoRR (2016)
Stavroula-Evita Fotinea, Eleni Efthimiou, Theodore Goulas, Athanasia-Lida Dimou, Costas S. Tzafestas, Vassilis Pitsikalis
The MOBOT Human-Robot Interaction: Showcasing Assistive HRI. PCI (2016)
George P. Moustris, Costas S. Tzafestas
Intention-based front-following control for an intelligent robotic rollator in indoor environments. SSCI (2016)
Stavroula-Evita Fotinea, Eleni Efthimiou, Maria Koutsombogera, Athanasia-Lida Dimou, Theodore Goulas, Petros Maragos, Costas S. Tzafestas
The MOBOT human-robot communication model. CogInfoCom (2015)
Xanthi S. Papageorgiou, Georgia Chalvatzaki, Costas S. Tzafestas, Petros Maragos
Hidden markov modeling of human pathological gait using laser range finder for an assisted living intelligent robotic walker. IROS (2015)
Xanthi S. Papageorgiou, Costas S. Tzafestas, Petros Maragos, Georgios Pavlakos, Georgia Chalvatzaki, George Moustris, Iasonas Kokkinos, Angelika Peer, Bartlomiej Stanczyk, Evita-Stavroula Fotinea, Eleni Efthimiou
Advances in Intelligent Mobility Assistance Robot Integrating Multimodal Sensory Processing. HCI (6) (2014)
Evita-Stavroula Fotinea, Eleni Efthimiou, Athanasia-Lida Dimou, Theodore Goulas, Panayotis Karioris, Angelika Peer, Petros Maragos, Costas S. Tzafestas, Iasonas Kokkinos, Klaus Hauer, Katja D. Mombaur, Yiannis Koumpouros, Bartlomiej Stanczyk
Data Acquisition towards Defining a Multimodal Interaction Model for Human - Assistive Robot Communication. HCI (6) (2014)
Xanthi S. Papageorgiou, Georgia Chalvatzaki, Costas S. Tzafestas, Petros Maragos
Hidden Markov modeling of human normal gait using laser range finder for a mobility assistance robot. ICRA (2014)
Georgia Chalvatzaki, Georgios Pavlakos, Kevis-Kokitsi Maninis, Xanthi S. Papageorgiou, Vassilis Pitsikalis, Costas S. Tzafestas, Petros Maragos
Towards an intelligent robotic walker for assisted living using multimodal sensorial data. MobiHealth (2014)
Sheraz Khan, Athanasios Dometios, Chris Verginis, Costas S. Tzafestas, Dirk Wollherr, Martin Buss
RMAP: a rectangular cuboid approximation framework for 3D environment mapping. Auton. Robots 37 (3) (2014)
Costas S. Tzafestas, Spyros Velanas
Telehaptic Perception of Delayed Stiffness Using Adaptive Impedance Control: Experimental Psychophysical Analysis. Presence Teleoperators Virtual Environ. 22 (4) (2013)
George P. Moustris, Andreas I. Mantelos, Costas S. Tzafestas
Enhancing surgical accuracy using virtual fixtures and motion compensation in robotic beating heart surgery. MED (2013)
George P. Moustris, Andreas I. Mantelos, Costas S. Tzafestas
Active motion compensation in robotic cardiac surgery. ECC (2013)
George P. Moustris, Andreas I. Mantelos, Costas S. Tzafestas
Shared control for motion compensation in robotic beating heart surgery. ICRA (2013)
Spyros Velanas, Costas S. Tzafestas
Model-mediated telehaptic perception of delayed curvature. RO-MAN (2012)
Nikos Mitsou, Roderick de Nijs, David Lenz, Johannes Frimberger, Dirk Wollherr, Kolja Kühnlenz, Costas S. Tzafestas
Online Semantic Mapping of Urban Environments. Spatial Cognition (2012)
Sheraz Khan, Nikos Mitsou, Dirk Wollherr, Costas S. Tzafestas
An optimization approach for 3D environment mapping using normal vector uncertainty. ICARCV (2012)
Nikos Mitsou, Irene Ntoutsi, Dirk Wollherr, Costas S. Tzafestas, Hans-Peter Kriegel
Revealing Cluster Formation over Huge Volatile Robotic Data. ICDM Workshops (2011)
Spyros Velanas, Costas S. Tzafestas
Human telehaptic perception of stiffness using an adaptive impedance reflection bilateral teleoperation control scheme. RO-MAN (2010)
John N. Karigiannis, Theodoros I. Rekatsinas, Costas S. Tzafestas
Fuzzy rule based neuro-dynamic programming for mobile robot skill acquisition on the basis of a nested multi-agent architecture. ROBIO (2010)
Manthos Alifragis, Costas S. Tzafestas
Stereo Pair Matching of Archaeological Scenes using Phase Domain Methods. IMAGAPP (2009)
Costas S. Tzafestas, Nikos Mitsou, Nikos Georgakarakos, Olga Diamanti, Petros Maragos, Stavroula-Evita Fotinea, Eleni Efthimiou
Gestural teleoperation of a mobile robot based on visual recognition of sign language static handshapes. RO-MAN (2009)
Manthos Alifragis, Costas S. Tzafestas
Stereo Analysis of Archaelogical Scenes Using Monogenic Signal Representation. VISIGRAPP (Selected Papers) (2009)
Costas S. Tzafestas, Spyros Velanas, George Fakiridis
Adaptive impedance control in haptic teleoperation to improve transparency under time-delay. ICRA (2008)
Costas S. Tzafestas, Kostas Birbas, Yiannis Koumpouros, Dimitris Christopoulos
Pilot Evaluation Study of a Virtual Paracentesis Simulator for Skill Training and Assessment: The Beneficial Effect of Haptic Display. Presence Teleoperators Virtual Environ. 17 (2) (2008)
Nikos Mitsou, Costas S. Tzafestas
Maximum Likelihood SLAM in Dynamic Environments. ICTAI (1) (2007)
Costas S. Tzafestas, Nektaria Palaiologou, Manthos Alifragis
Virtual and remote robotic laboratory: comparative experimental evaluation. IEEE Trans. Educ. 49 (3) (2006)
Nikos Mitsou, Spyros Velanas, Costas S. Tzafestas
Visuo-Haptic Interface for Teleoperation of Mobile Robot Exploration Tasks. RO-MAN (2006)
Costas S. Tzafestas, Yiannis Koumpouros, Kostas Birbas
Haptic interaction in VR-based paracentesis simulation for dexterity enhancement and assessment. CARS (2004)
Costas S. Tzafestas
Whole-hand kinesthetic feedback and haptic perception in dextrous virtual manipulation. IEEE Trans. Syst. Man Cybern. Part A 33 (1) (2003)
Costas S. Tzafestas, Petros Maragos
Shape Connectivity: Multiscale Analysis and Application to Generalized Granulometries. J. Math. Imaging Vis. 17 (2) (2002)
Anastasia Sofou, Costas S. Tzafestas, Petros Maragos
Segmentation of soil section images using connected operators. ICIP (3) (2001)
Gerasimos G. Rigatos, Costas S. Tzafestas, Spyros G. Tzafestas
Mobile robot motion control in partially unknown environments using a sliding-mode fuzzy-logic controller. Robotics Auton. Syst. 33 (1) (2000)
Costas S. Tzafestas, Spyros G. Tzafestas
Recent algorithms for fuzzy and neurofuzzy path planning and navigation of autonomous mobile robots. ECC (1999)
Costas S. Tzafestas, Platon A. Prokopiou, Spyros G. Tzafestas
Path Planning and Control of a Cooperative Three-Robot System Manipulating Large Objects. J. Intell. Robotic Syst. 22 (2) (1998)
Punpiti Piamsa-nga, Nikitas A. Alexandridis, George C. Blankenship Jr., George K. Papakonstantinou, Panayotis Tsanakas, Costas S. Tzafestas
A unified model for multimedia retrieval by content. CATA (1998)
Spyros G. Tzafestas, Platon A. Prokopiou, Costas S. Tzafestas
Robust telemanipulator control using a partitioned neural network architecture. ICNN (1997)
Costas S. Tzafestas, Philippe Coiffet
Computing optimal forces for generalised kinesthetic feedback on the human hand during virtual grasping and manipulation. ICRA (1997)
Abderrahmane Kheddar, Costas S. Tzafestas, Philippe Coiffet
The hidden robot concept-high level abstraction teleoperation. IROS (1997)
Costas S. Tzafestas, Nacer K. M'Sirdi, N. Manamani
Adaptive Impedance Control Applied to a Pneumatic Legged Robot. J. Intell. Robotic Syst. 20 (2-4) (1997)
Spyros G. Tzafestas, Thanassis E. Krikochoritis, Costas S. Tzafestas
Robust Sliding-mode Control of Nine-link Biped Robot Walking. J. Intell. Robotic Syst. 20 (2-4) (1997)
Abderrahmane Kheddar, Costas S. Tzafestas, Philippe Coiffet, Tetsuo Kotoku, Kazuo Tanie
Multi-robot teleoperation using direct human hand actions. Adv. Robotics 11 (8) (1996)
Spyros G. Tzafestas, Mark Raibert, Costas S. Tzafestas
Robust sliding-mode control applied to a 5-link biped robot. J. Intell. Robotic Syst. 15 (1) (1996)
Costas S. Tzafestas, Marina Guihard, Nacer K. M'Sirdi
Two-stage adaptive impedance control applied to a legged robot. IROS (3) (1995)