Two-stage adaptive impedance control applied to a legged robot. - Costas S. Tzafestas; Marina Guihard; Nacer K. M'Sirdi (IROS (3), 1995)

Multi-robot teleoperation using direct human hand actions. - Abderrahmane Kheddar; Costas S. Tzafestas; Philippe Coiffet; Tetsuo Kotoku; Kazuo Tanie (Adv. Robotics, 1996)

Robust sliding-mode control applied to a 5-link biped robot. - Spyros G. Tzafestas; Mark Raibert; Costas S. Tzafestas (J. Intell. Robotic Syst., 1996)

Robust telemanipulator control using a partitioned neural network architecture. - Spyros G. Tzafestas; Platon A. Prokopiou; Costas S. Tzafestas (ICNN, 1997)

Computing optimal forces for generalised kinesthetic feedback on the human hand during virtual grasping and manipulation. - Costas S. Tzafestas; Philippe Coiffet (ICRA, 1997)

The hidden robot concept-high level abstraction teleoperation. - Abderrahmane Kheddar; Costas S. Tzafestas; Philippe Coiffet (IROS, 1997)

Robust Sliding-mode Control of Nine-link Biped Robot Walking. - Spyros G. Tzafestas; Thanassis E. Krikochoritis; Costas S. Tzafestas (J. Intell. Robotic Syst., 1997)

Adaptive Impedance Control Applied to a Pneumatic Legged Robot. - Costas S. Tzafestas; Nacer K. M'Sirdi; N. Manamani (J. Intell. Robotic Syst., 1997)

A unified model for multimedia retrieval by content. - Punpiti Piamsa-nga; Nikitas A. Alexandridis; George C. Blankenship Jr.; George K. Papakonstantinou; Panayotis Tsanakas; Costas S. Tzafestas (CATA, 1998)

Path Planning and Control of a Cooperative Three-Robot System Manipulating Large Objects. - Costas S. Tzafestas; Platon A. Prokopiou; Spyros G. Tzafestas (J. Intell. Robotic Syst., 1998)

Recent algorithms for fuzzy and neurofuzzy path planning and navigation of autonomous mobile robots. - Costas S. Tzafestas; Spyros G. Tzafestas (ECC, 1999)

Mobile robot motion control in partially unknown environments using a sliding-mode fuzzy-logic controller. - Gerasimos G. Rigatos; Costas S. Tzafestas; Spyros G. Tzafestas (Robotics Auton. Syst., 2000)

Segmentation of soil section images using connected operators. - Anastasia Sofou; Costas S. Tzafestas; Petros Maragos (ICIP (3), 2001)

Shape Connectivity: Multiscale Analysis and Application to Generalized Granulometries. - Costas S. Tzafestas; Petros Maragos (J. Math. Imaging Vis., 2002)

Whole-hand kinesthetic feedback and haptic perception in dextrous virtual manipulation. - Costas S. Tzafestas (IEEE Trans. Syst. Man Cybern. Part A, 2003)

Haptic interaction in VR-based paracentesis simulation for dexterity enhancement and assessment. - Costas S. Tzafestas; Yiannis Koumpouros; Kostas Birbas (CARS, 2004)

Visuo-Haptic Interface for Teleoperation of Mobile Robot Exploration Tasks. - Nikos Mitsou; Spyros Velanas; Costas S. Tzafestas (RO-MAN, 2006)

Virtual and remote robotic laboratory: comparative experimental evaluation. - Costas S. Tzafestas; Nektaria Palaiologou; Manthos Alifragis (IEEE Trans. Educ., 2006)

Maximum Likelihood SLAM in Dynamic Environments. - Nikos Mitsou; Costas S. Tzafestas (ICTAI (1), 2007)

Adaptive impedance control in haptic teleoperation to improve transparency under time-delay. - Costas S. Tzafestas; Spyros Velanas; George Fakiridis (ICRA, 2008)

Pilot Evaluation Study of a Virtual Paracentesis Simulator for Skill Training and Assessment: The Beneficial Effect of Haptic Display. - Costas S. Tzafestas; Kostas Birbas; Yiannis Koumpouros; Dimitris Christopoulos (Presence Teleoperators Virtual Environ., 2008)

Stereo Pair Matching of Archaeological Scenes using Phase Domain Methods. - Manthos Alifragis; Costas S. Tzafestas (IMAGAPP, 2009)

Gestural teleoperation of a mobile robot based on visual recognition of sign language static handshapes. - Costas S. Tzafestas; Nikos Mitsou; Nikos Georgakarakos; Olga Diamanti; Petros Maragos; Stavroula-Evita Fotinea; Eleni Efthimiou (RO-MAN, 2009)

Stereo Analysis of Archaelogical Scenes Using Monogenic Signal Representation. - Manthos Alifragis; Costas S. Tzafestas (VISIGRAPP (Selected Papers), 2009)

Human telehaptic perception of stiffness using an adaptive impedance reflection bilateral teleoperation control scheme. - Spyros Velanas; Costas S. Tzafestas (RO-MAN, 2010)

Fuzzy rule based neuro-dynamic programming for mobile robot skill acquisition on the basis of a nested multi-agent architecture. - John N. Karigiannis; Theodoros I. Rekatsinas; Costas S. Tzafestas (ROBIO, 2010)

Revealing Cluster Formation over Huge Volatile Robotic Data. - Nikos Mitsou; Irene Ntoutsi; Dirk Wollherr; Costas S. Tzafestas; Hans-Peter Kriegel (ICDM Workshops, 2011)

An optimization approach for 3D environment mapping using normal vector uncertainty. - Sheraz Khan 001; Nikos Mitsou; Dirk Wollherr; Costas S. Tzafestas (ICARCV, 2012)

Model-mediated telehaptic perception of delayed curvature. - Spyros Velanas; Costas S. Tzafestas (RO-MAN, 2012)

Online Semantic Mapping of Urban Environments. - Nikos Mitsou; Roderick de Nijs; David Lenz 001; Johannes Frimberger; Dirk Wollherr; Kolja Kühnlenz; Costas S. Tzafestas (Spatial Cognition, 2012)

Active motion compensation in robotic cardiac surgery. - George P. Moustris; Andreas I. Mantelos; Costas S. Tzafestas (ECC, 2013)

Shared control for motion compensation in robotic beating heart surgery. - George P. Moustris; Andreas I. Mantelos; Costas S. Tzafestas (ICRA, 2013)

Enhancing surgical accuracy using virtual fixtures and motion compensation in robotic beating heart surgery. - George P. Moustris; Andreas I. Mantelos; Costas S. Tzafestas (MED, 2013)

Telehaptic Perception of Delayed Stiffness Using Adaptive Impedance Control: Experimental Psychophysical Analysis. - Costas S. Tzafestas; Spyros Velanas (Presence Teleoperators Virtual Environ., 2013)

Data Acquisition towards Defining a Multimodal Interaction Model for Human - Assistive Robot Communication. - 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; et al. (HCI (6), 2014)

Advances in Intelligent Mobility Assistance Robot Integrating Multimodal Sensory Processing. - 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 (HCI (6), 2014)

Hidden Markov modeling of human normal gait using laser range finder for a mobility assistance robot. - Xanthi S. Papageorgiou; Georgia Chalvatzaki; Costas S. Tzafestas; Petros Maragos (ICRA, 2014)

Towards an intelligent robotic walker for assisted living using multimodal sensorial data. - Georgia Chalvatzaki; Georgios Pavlakos; Kevis-Kokitsi Maninis; Xanthi S. Papageorgiou; Vassilis Pitsikalis; Costas S. Tzafestas; Petros Maragos (MobiHealth, 2014)

RMAP: a rectangular cuboid approximation framework for 3D environment mapping. - Sheraz Khan 001; Athanasios Dometios; Christos K. Verginis; Costas S. Tzafestas; Dirk Wollherr; Martin Buss (Auton. Robots, 2014)

The MOBOT human-robot communication model. - Stavroula-Evita Fotinea; Eleni Efthimiou; Maria Koutsombogera; Athanasia-Lida Dimou; Theodore Goulas; Petros Maragos; Costas S. Tzafestas (CogInfoCom, 2015)

Hidden markov modeling of human pathological gait using laser range finder for an assisted living intelligent robotic walker. - Xanthi S. Papageorgiou; Georgia Chalvatzaki; Costas S. Tzafestas; Petros Maragos (IROS, 2015)

Assistive front-following control of an intelligent robotic rollator based on a modified dynamic window planner. - George P. Moustris; Costas S. Tzafestas (BioRob, 2016)

Experimental validation of human pathological gait analysis for an assisted living intelligent robotic walker. - Xanthi S. Papageorgiou; Georgia Chalvatzaki; Konstantinos-Nektarios Lianos; Christian Werner; Klaus Hauer; Costas S. Tzafestas; Petros Maragos (BioRob, 2016)

Human Joint Angle Estimation and Gesture Recognition for Assistive Robotic Vision. - Riza Alp Güler; Nikolaos Kardaris; Siddhartha Chandra; Vassilis Pitsikalis; Christian Werner; Klaus Hauer; Costas S. Tzafestas; Petros Maragos; Iasonas Kokkinos (ECCV Workshops (2), 2016)

The MOBOT Platform - Showcasing Multimodality in Human-Assistive Robot Interaction. - Eleni Efthimiou; Stavroula-Evita Fotinea; Theodore Goulas; Athanasia-Lida Dimou; Maria Koutsombogera; Vassilis Pitsikalis; Petros Maragos; Costas S. Tzafestas (HCI (8), 2016)

Experimental comparison of human gait tracking algorithms: Towards a context-aware mobility assistance robotic walker. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Christian Werner; Klaus Hauer; Costas S. Tzafestas; Petros Maragos (MED, 2016)

Towards ICT-supported bath robots: Control architecture description and localized perception of user for robot motion planning. - Athanasios C. Dometios; Xanthi S. Papageorgiou; Costas S. Tzafestas; Panagiotis Vartholomeos (MED, 2016)

Simplifying mobile robot tracking control through feedback equivalence. - George P. Moustris; Costas S. Tzafestas (MED, 2016)

The MOBOT Human-Robot Interaction: Showcasing Assistive HRI. - Stavroula-Evita Fotinea; Eleni Efthimiou; Theodore Goulas; Athanasia-Lida Dimou; Costas S. Tzafestas; Vassilis Pitsikalis (PCI, 2016)

The MOBOT rollator human-robot interaction model and user evaluation process. - 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; et al. (SSCI, 2016)

Intention-based front-following control for an intelligent robotic rollator in indoor environments. - George P. Moustris; Costas S. Tzafestas (SSCI, 2016)

Active exploration in parameterized reinforcement learning. - Mehdi Khamassi; Costas S. Tzafestas (CoRR, 2016)

Model-free learning on robot kinematic chains using a nested multi-agent topology. - John N. Karigiannis; Costas S. Tzafestas (J. Exp. Theor. Artif. Intell., 2016)

Social Human-Robot Interaction for the Elderly: Two Real-life Use Cases. - Athanasia Zlatintsi; Isidoros Rodomagoulakis; Vassilis Pitsikalis; Petros Koutras; Nikolaos Kardaris; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (HRI (Companion), 2017)

Comparative experimental validation of human gait tracking algorithms for an intelligent robotic rollator. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (ICRA, 2017)

Active Exploration and Parameterized Reinforcement Learning Applied to a Simulated Human-Robot Interaction Task. - Mehdi Khamassi; George Velentzas; Theodore Tsitsimis; Costas S. Tzafestas (IRC, 2017)

Towards a user-adaptive context-aware robotic walker with a pathological gait assessment system: First experimental study. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Costas S. Tzafestas (IROS, 2017)

Real-time end-effector motion behavior planning approach using on-line point-cloud data towards a user adaptive assistive bath robot. - Athanasios C. Dometios; Xanthi S. Papageorgiou; Antonis Arvanitakis; Costas S. Tzafestas; Petros Maragos (IROS, 2017)

Intelligent Assistive Robotic Systems for the elderly: Two real-life use cases. - Xanthi S. Papageorgiou; Georgia Chalvatzaki; Athanasios Dometios; Costas S. Tzafestas; Petros Maragos (PETRA, 2017)

Estimating double support in pathological gaits using an HMM-based analyzer for an intelligent robotic walker. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (RO-MAN, 2017)

Feedback Equivalence Between Curve & Straight Line Tracking for Unmanned Aerial Vehicles. - George P. Moustris; Panagiotis Kyriakis; Costas S. Tzafestas (ECC, 2018)

Multimodal Signal Processing and Learning Aspects of Human-Robot Interaction for an Assistive Bathing Robot. - Athanasia Zlatintsi; Isidoros Rodomagoulakis; Petros Koutras; A. C. Dometios; Vassilis Pitsikalis; Costas S. Tzafestas; Petros Maragos (ICASSP, 2018)

User-Adaptive Human-Robot Formation Control for an Intelligent Robotic Walker Using Augmented Human State Estimation and Pathological Gait Characterization. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Petros Maragos; Costas S. Tzafestas (IROS, 2018)

Object Assembly Guidance in Child-Robot Interaction using RGB-D based 3D Tracking. - Jack Hadfield; Petros Koutras; Niki Efthymiou; Gerasimos Potamianos; Costas S. Tzafestas; Petros Maragos (IROS, 2018)

A Framework for Robot Learning During Child-Robot Interaction with Human Engagement as Reward Signal. - Mehdi Khamassi; Georgia Chalvatzaki; Theodore Tsitsimis; George Velentzas; Costas S. Tzafestas (RO-MAN, 2018)

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. - Georgia Chalvatzaki; Petros Koutras; Jack Hadfield; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (CoRR, 2018)

Adaptive reinforcement learning with active state-specific exploration for engagement maximization during simulated child-robot interaction. - George Velentzas; Theodore Tsitsimis; Iñaki Rañó; Costas S. Tzafestas; Mehdi Khamassi (Paladyn J. Behav. Robotics, 2018)

Augmented Human State Estimation Using Interacting Multiple Model Particle Filters With Probabilistic Data Association. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (IEEE Robotics Autom. Lett., 2018)

Vision-Based Online Adaptation of Motion Primitives to Dynamic Surfaces: Application to an Interactive Robotic Wiping Task. - Athanasios C. Dometios; You Zhou 007; Xanthi S. Papageorgiou; Costas S. Tzafestas; Tamim Asfour (IEEE Robotics Autom. Lett., 2018)

Robot Fast Adaptation to Changes in Human Engagement During Simulated Dynamic Social Interaction With Active Exploration in Parameterized Reinforcement Learning. - Mehdi Khamassi; George Velentzas; Theodore Tsitsimis; Costas S. Tzafestas (IEEE Trans. Cogn. Dev. Syst., 2018)

Video Processing and Learning in Assistive Robotic Applications. - Petros Koutras; Georgia Chalvatzaki; Antigoni Tsiami; Alexandros Nikolakakis; Costas S. Tzafestas; Petros Maragos (ICIP, 2019)

LSTM-based Network for Human Gait Stability Prediction in an Intelligent Robotic Rollator. - Georgia Chalvatzaki; Petros Koutras; Jack Hadfield; Xanthi S. Papageorgiou; Costas S. Tzafestas; Petros Maragos (ICRA, 2019)

A Deep Learning Approach for Multi-View Engagement Estimation of Children in a Child-Robot Joint Attention Task. - Jack Hadfield; Georgia Chalvatzaki; Petros Koutras; Mehdi Khamassi; Costas S. Tzafestas; Petros Maragos (IROS, 2019)

Learn to Adapt to Human Walking: A Model-Based Reinforcement Learning Approach for a Robotic Assistant Rollator. - Georgia Chalvatzaki; Xanthi S. Papageorgiou; Petros Maragos; Costas S. Tzafestas (IEEE Robotics Autom. Lett., 2019)

i-Walk Intelligent Assessment System: Activity, Mobility, Intention, Communication. - Georgia Chalvatzaki; Petros Koutras; Antigoni Tsiami; Costas S. Tzafestas; Petros Maragos (ECCV Workshops (4), 2020)

The I-Walk Assistive Robot - A Multimodal Intelligent Robotic Rollator Providing Cognitive and Mobility Assistance to the Elderly and Motor-Impaired. - 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; et al. (HFR, 2020)

Periodic movement learning in a soft-robotic arm*. - Paris Oikonomou; Mehdi Khamassi; Costas S. Tzafestas (ICRA, 2020)

A Novel Reinforcement-Based Paradigm for Children to Teach the Humanoid Kaspar Robot. - Abolfazl Zaraki; Mehdi Khamassi; Luke Jai Wood; Gabriella Lakatos; Costas S. Tzafestas; Farshid Amirabdollahian; Ben Robins; Kerstin Dautenhahn (Int. J. Soc. Robotics, 2020)

I-Support: A robotic platform of an assistive bathing robot for the elderly population. - 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; et al. (Robotics Auton. Syst., 2020)

Deep Leg Tracking by Detection and Gait Analysis in 2D Range Data for Intelligent Robotic Assistants. - Danai Efstathiou; Georgia Chalvatzaki; Athanasios Dometios; Dionisios Spiliopoulos; Costas S. Tzafestas (IROS, 2021)

Task Driven Skill Learning in a Soft-Robotic Arm. - Paris Oikonomou; Athanasios Dometios; Mehdi Khamassi; Costas S. Tzafestas (IROS, 2021)

Towards a User Adaptive Assistive Robot: Learning from Demonstration Using Navigation Functions. - Xanthi S. Papageorgiou; Athanasios C. Dometios; Costas S. Tzafestas (IROS, 2021)

The i-Walk Lightweight Assistive Rollator: First Evaluation Study. - 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; et al. (Frontiers Robotics AI, 2021)

Reproduction of Human Demonstrations with a Soft-Robotic Arm based on a Library of Learned Probabilistic Movement Primitives. - Paris Oikonomou; Athanasios Dometios; Mehdi Khamassi; Costas S. Tzafestas (ICRA, 2022)

Modelling and Analysis of a Parallel Double Delta Mechanism for Robotic Surgery. - George P. Moustris; Costas S. Tzafestas (MED, 2022)

Interaction Control of a Robotic Manipulator With the Surface of Deformable Object. - Athanasios C. Dometios; Costas S. Tzafestas (IEEE Trans. Robotics, 2023)

A long distance telesurgical demonstration on robotic surgery phantoms over 5G. - George Moustris; Costas S. Tzafestas; Konstantinos Konstantinidis (Int. J. Comput. Assist. Radiol. Surg., 2023)

Zero-shot model-free learning of periodic movements for a bio-inspired soft-robotic arm. - Paris Oikonomou; Athanasios Dometios; Mehdi Khamassi; Costas S. Tzafestas (Frontiers Robotics AI, 2023)

SoftGrip: Towards a Soft Robotic Platform for Automatized Mushroom Harvesting. - Niccolò Pagliarani; Costas S. Tzafestas; Evangelos Papadopoulos; Petros Maragos; Athanasios S. Mastrogeorgiou; Antonios Porichis; Helen Grogan; Robin Ehrhardt; Matteo Cianchetti (ERF (1), 2024)

Online Prediction of Novel Trajectories Using a Library of Movement Primitives. - Paris Oikonomou; Athanasios Dometios; Mehdi Khamassi; Costas S. Tzafestas (ICDL, 2024)

Localization and Offline Mapping of High-Voltage Substations in Rough Terrain Using a Ground Vehicle. - Ioannis Alamanos; George P. Moustris; Costas S. Tzafestas (MED, 2024)

Straight Walking Gait Parameter Prediction with a Reduced Number of Sensors. - Maximilian Maniacco; Costas S. Tzafestas; Angelika Peer (MED, 2024)

A Comparative Study of Real-Time Implementable Cooperative Aerial Manipulation Systems. - Stamatina C. Barakou; Costas S. Tzafestas; Kimon P. Valavanis (CoRR, 2024)

Constructing Visibility Maps of Optimal Positions for Robotic Inspection in Ultra-High Voltage Centers. - Panagiotis Mermigkas; George P. Moustris; Costas S. Tzafestas; Petros Maragos (MED, 2025)

Proactive tactile exploration for object-agnostic shape reconstruction from minimal visual priors. - Paris Oikonomou; George Retsinas; Petros Maragos; Costas S. Tzafestas (CoRR, 2025)