Nicholas Vretos

According to our database, Nicholas Vretos authored at least 56 papers between 2005 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

Transformer-Based Fire Detection in Videos.

Konstantina Mardani, Nicholas Vretos, Petros Daras

Sensors, March, 2023

Less Is More: Adaptive Trainable Gradient Dropout for Deep Neural Networks.

Christos Avgerinos, Nicholas Vretos, Petros Daras

Sensors, February, 2023

2022

Virtual assistants and intelligent care environments for long-term patients: A Home set scenario.

Rodrigo Medina-García, Cristina María Lozano-Hernández, Juan Mercado Gómez, Jennifer Jiménez Ramos, Spela Glisovic Krivec, Martina Steinböck, Agostino Chiaravalloti, Panagiotis Karkazis, Vassilis Solachidis, Nicholas Vretos, Javier Serrano, Federico Álvarez

Proceedings of the PETRA '22: The 15th International Conference on PErvasive Technologies Related to Assistive Environments, Corfu, Greece, 29 June 2022, 2022

Monitoring of motor function in the rehabilitation room.

Jennifer Jiménez, Juan Mercado, Laura Carrasco, Verónica Ruíz, Vassilios Solachidis, Javier Serrano, Nicholas Vretos, Federico Álvarez

Proceedings of the PETRA '22: The 15th International Conference on PErvasive Technologies Related to Assistive Environments, Corfu, Greece, 29 June 2022, 2022

A Symbiotic Orchestration Module for Multi-agent Collaboration in Disaster Response Scenarios.

Thomas Theodoridis, George Katsikas, Nicholas Vretos, Petros Daras

Proceedings of the 19th International Conference on Information Systems for Crisis Response and Management, 2022

2021

Zernike Pooling: Generalizing Average Pooling Using Zernike Moments.

Thomas Theodoridis, Kostas Loumponias, Nicholas Vretos, Petros Daras

IEEE Access, 2021

TeNDER: towards efficient Health Systems through e-Health platforms employing multimodal monitoring.

Vassilis Solachidis, Jaime Rodriguez Moreno, Gustavo Hernández-Peñaloza, Nicholas Vretos, Federico Álvarez, Petros Daras

Proceedings of the IEEE/ACM Conference on Connected Health: Applications, 2021

2020

An Improved Tobit Kalman Filter with Adaptive Censoring Limits.

Kostas Loumponias, Nicholas Vretos, George Tsaklidis, Petros Daras

Circuits Syst. Signal Process., 2020

Comprehensive Comparison of Deep Learning Models for Lung and COVID-19 Lesion Segmentation in CT scans.

Paschalis Bizopoulos, Nicholas Vretos, Petros Daras

CoRR, 2020

Non-Parametric Clustering Using Deep Neural Networks.

Christos Avgerinos, Vassilios Solachidis, Nicholas Vretos, Petros Daras

IEEE Access, 2020

RobusterNet: Improving Copy-Move Forgery Detection with Volterra-based Convolutions.

Efthimia Kafali, Nicholas Vretos, Theodoros Semertzidis, Petros Daras

Proceedings of the 25th International Conference on Pattern Recognition, 2020

Nadine-Bot: An Open Domain Migrant Integration Administrative Agent.

Athanasios Lelis, Nicholas Vretos, Petros Daras

Proceedings of the 2020 IEEE International Conference on Multimedia & Expo Workshops, 2020

Embracing Novel ICT Technologies to Support the Journey From Camp to Job.

Helen C. Leligou, Despina Anastosopoulos, Anita Montagna, Vassilis Solachidis, Nicholas Vretos

Proceedings of the 2020 IEEE International Conference on Multimedia & Expo Workshops, 2020

Multi-view Adaptive Graph Convolutions for Graph Classification.

Nikolas Adaloglou, Nicholas Vretos, Petros Daras

Proceedings of the Computer Vision - ECCV 2020, 2020

2019

Exploiting sensing devices availability in AR/VR deployments to foster engagement.

Nicholas Vretos, Petros Daras, Stylianos Asteriadis, Enrique Hortal, Esam Ghaleb, Evaggelos Spyrou, Helen C. Leligou, Panagiotis Karkazis, Panagiotis Trakadas, Kostantinos Assimakopoulos

Virtual Real., 2019

Graph-based multimodal fusion with metric learning for multimodal classification.

Michalis Angelou, Vassilis Solachidis, Nicholas Vretos, Petros Daras

Pattern Recognit., 2019

Frequency-based slow feature analysis.

Alexandros Doumanoglou, Nicholas Vretos, Petros Daras

Neurocomputing, 2019

A novel framework for physical therapy rehabilitation monitoring and assessment in Parkinson disease patients using depth information.

Alberto Belmonte-Hernández, Thomas Theodoridis, Marta Burgos González, Gustavo Hernández-Peñaloza, Vassilios Solachidis, Jennifer Jiménez Ramos, Federico Álvarez, Nicholas Vretos, Laura Carrasco, Petros Daras

Proceedings of the 12th ACM International Conference on PErvasive Technologies Related to Assistive Environments, 2019

Embedding Big Data in Graph Convolutional Networks.

Gerasimos Palaiopanos, Panagiotis Stalidis, Nicholas Vretos, Theodoros Semertzidis, Petros Daras

Proceedings of the IEEE International Conference on Engineering, Technology and Innovation, 2019

A Battery Powered Vision Sensor for Forensic Evidence Gathering.

Yu Zou, Michela Lecca, Massimo Gottardi, Giulio Urlini, Nicholas Vretos, Lazaros Gymnopoulos, Petros Daras

Proceedings of the 13th International Conference on Distributed Smart Cameras, 2019

2018

Behavior Analysis through Multimodal Sensing for Care of Parkinson's and Alzheimer's Patients.

Federico Alvarez, Mirela Popa, Vassilios Solachidis, Gustavo Hernandez-Penaloza, Alberto Belmonte-Hernandez, Stylianos Asteriadis, Nicholas Vretos, Marcos Quintana, Thomas Theodoridis, Dario Dotti, Petros Daras

IEEE Multim., 2018

Adaptive Tobit Kalman-Based Tracking.

Kostas Loumponias, Anastasios Dimou, Nicholas Vretos, Petros Daras

Proceedings of the 14th International Conference on Signal-Image Technology & Internet-Based Systems, 2018

Two examples of online eHealth platforms for supporting people living with cognitive impairments and their caregivers.

Vassilis Solachidis, Ioannis Paliokas, Nicholas Vretos, Konstantinos Votis, Ulises Cortés, Dimitrios Tzovaras

Proceedings of the 11th PErvasive Technologies Related to Assistive Environments Conference, 2018

Affective State Recognition based on eye gaze Analysis using two-Stream Convolutional Networks.

Christina Chrysouli, Nicholas Vretos, Petros Daras

Proceedings of the 28th IEEE International Workshop on Machine Learning for Signal Processing, 2018

Leveraging Skeleton Structure and Time Dependencies in the Scope of Action Recognition.

Ioannis Tsingalis, Nicholas Vretos, Petros Daras

Proceedings of the 2018 IEEE International Conference on Image Processing, 2018

Exploiting IoT Technologies for Personalized Learning.

Evaggelos Spyrou, Nicholas Vretos, Andrew Pomazanskyi, Stylianos Asteriadis, Helen C. Leligou

Proceedings of the 2018 IEEE Conference on Computational Intelligence and Games, 2018

Adaptive Learning Based on Affect Sensing.

Dorothea Tsatsou, Andrew Pomazanskyi, Enrique Hortal, Evaggelos Spyrou, Helen C. Leligou, Stylianos Asteriadis, Nicholas Vretos, Petros Daras

Proceedings of the Artificial Intelligence in Education - 19th International Conference, 2018

2017

Modelling learning experiences in adaptive multi-agent learning environments.

Dorothea Tsatsou, Nicholas Vretos, Petros Daras

Proceedings of the 9th International Conference on Virtual Worlds and Games for Serious Applications, 2017

Affect state recognition for adaptive human robot interaction in learning environments.

Dimitrios Antonaras, Charis Pavlidis, Nicholas Vretos, Petros Daras

Proceedings of the 12th International Workshop on Semantic and Social Media Adaptation and Personalization, 2017

Non-linear Convolution Filters for CNN-Based Learning.

Georgios Zoumpourlis, Alexandros Doumanoglou, Nicholas Vretos, Petros Daras

Proceedings of the IEEE International Conference on Computer Vision, 2017

ICT4Life open source libraries supporting multimodal analysis of different diseases.

Thomas Theodoridis, Vassilis Solachidis, Nicholas Vretos, Petros Daras, Dario Dotti, Mirela Popa, Gustavo Hernández, Federico Alvarez, Alejandro Gonzalez Paton, Angel Lopez

Proceedings of the 14th IEEE International Conference on Advanced Video and Signal Based Surveillance, 2017

Person tracking association using multi-modal systems.

Alberto Belmonte-Hernandez, Vassilis Solachidis, Thomas Theodoridis, Gustavo Hernandez-Penaloza, Giuseppe Conti, Nicholas Vretos, Federico Alvarez, Petros Daras

Proceedings of the 14th IEEE International Conference on Advanced Video and Signal Based Surveillance, 2017

Multimodal monitoring of Parkinson's and Alzheimer's patients using the ICT4LIFE platform.

Federico Alvarez, Mirela Popa, Nicholas Vretos, Alberto Belmonte-Hernandez, Stelios Asteriadis, Vassilis Solachidis, Triana Mariscal, Dario Dotti, Petros Daras

Proceedings of the 14th IEEE International Conference on Advanced Video and Signal Based Surveillance, 2017

ICT Services for Life Improvement for the Elderly.

Alejandro Sánchez-Rico, Pascal Garel, Isabella Notarangelo, Marcos Quintana, Gustavo Hernández, Stylianos Asteriadis, Mirela Popa, Nicholas Vretos, Vassilis Solachidis, Marta Burgos, Ariane Girault

Proceedings of the Harnessing the Power of Technology to Improve Lives, 2017

2016

Social Media Interaction and Analytics for Enhanced Educational Experiences.

Georgios Palaiokrassas, Athanasios Voulodimos, Kleopatra Konstanteli, Nicholas Vretos, David Salama Osborne, Efstathia Chatzi, Petros Daras, Dora Varvarigou

IEEE Multim., 2016

Enhancing real-time full 3D reconstruction of humans with pre-scanned meshes.

Nicholas Vretos, Dimitrios S. Alexiadis, Dimitrios Zarpalas, Petros Daras

Proceedings of the 2016 IEEE International Conference on Image Processing, 2016

Action recognition from videos using sparse trajectories.

Alexandros Doumanoglou, Nicholas Vretos, Petros Daras

Proceedings of the 7th International Conference on Imaging for Crime Detection and Prevention, 2016

2015

A novel dimensionality reduction technique based on kernel optimization through graph embedding.

Nicholas Vretos, Anastasios Tefas, Ioannis Pitas

Signal Image Video Process., 2015

2014

Temporal and color consistent disparity estimation in stereo videos.

Nicholas Vretos, Petros Daras

Proceedings of the 2014 IEEE International Conference on Image Processing, 2014

Future Media Internet Technologies for Digital Domes.

Dimitrios Christopoulos, Efstathia Chatzi, Anargyros Chatzitofis, Nicholas Vretos, Petros Daras

Proceedings of the Virtual, Augmented and Mixed Reality. Designing and Developing Virtual and Augmented Environments, 2014

2013

Using robust dispersion estimation in support vector machines.

Nicholas Vretos, Anastasios Tefas, Ioannis Pitas

Pattern Recognit., 2013

Three-dimensional monitoring of weightlifting for computer assisted training.

Anargyros Chatzitofis, Nicholas Vretos, Dimitrios Zarpalas, Petros Daras

Proceedings of the Virtual Reality International Conference - Laval Virtual, 2013

2012

Ανθρωποκεντρική ανάλυση και σημασιολογική περιγραφή βίντεο

Nicholas Vretos

PhD thesis, 2012

Video fingerprinting using Latent Dirichlet Allocation and facial images.

Nicholas Vretos, Nikos Nikolaidis, Ioannis Pitas

Pattern Recognit., 2012

Facial expression recognition with robust covariance estimation and Support Vector Machines.

Nicholas Vretos, Anastasios Tefas, Ioannis Pitas

Proceedings of the IEEE International Workshop on Machine Learning for Signal Processing, 2012

The use of Audio-Visual Description Profile in 3D video content description.

Nicholas Vretos, Nikos Nikolaidis, Ioannis Pitas

Proceedings of the 3DTV-Conference 2012: The True Vision, 2012

2011

A mutual information based face clustering algorithm for movie content analysis.

Nicholas Vretos, Vassilios Solachidis, Ioannis Pitas

Image Vis. Comput., 2011

3D facial expression recognition using Zernike moments on depth images.

Nicholas Vretos, Nikos Nikolaidis, Ioannis Pitas

Proceedings of the 18th IEEE International Conference on Image Processing, 2011

Face clustering in videos based on spectral clustering techniques.

Christina Chrysouli, Nicholas Vretos, Ioannis Pitas

Proceedings of the First Asian Conference on Pattern Recognition, 2011

2009

A perceptual hashing algorithm using latent dirichlet allocation.

Nicholas Vretos, Nikos Nikolaidis, Ioannis Pitas

Proceedings of the 2009 IEEE International Conference on Multimedia and Expo, 2009

A model-based facial expression recognition algorithm using Principal Components Analysis.

Nicholas Vretos, Nikos Nikolaidis, Ioannis Pitas

Proceedings of the International Conference on Image Processing, 2009

2008

Facial expression recognition using angle-related information from facial meshes.

Nicholas Vretos, Vassilios Solachidis, Petr Somol, Ioannis Pitas

Proceedings of the 2008 16th European Signal Processing Conference, 2008

2007

A Face Tracker Trajectories Clustering Using Mutual Information.

Nicholas Vretos, Vassilios Solachidis, Ioannis Pitas

Proceedings of the IEEE 9th Workshop on Multimedia Signal Processing, 2007

2006

A Mutual Information based Face Clustering Algorithm for Movies.

Nicholas Vretos, Vassilios Solachidis, Ioannis Pitas

Proceedings of the 2006 IEEE International Conference on Multimedia and Expo, 2006

2005

An MPEG-7 Based Description Scheme for Video Analysis Using Anthropocentric Video Content Descriptors.

Nicholas Vretos, Vassilios Solachidis, Ioannis Pitas

Proceedings of the Advances in Informatics, 2005

An anthropocentric description scheme for movies content classification and indexing.

Nicholas Vretos, Vassilios Solachidis, Ioannis Pitas

Proceedings of the 13th European Signal Processing Conference, 2005