Sotirios Chatzis

65 papers A* 7A 2Misc 2Journal 40Unranked 14

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Gaze Prediction in Virtual Reality Without Eye Tracking Using Visual and Head Motion Cues. CoRR Christos Petrou, Harris Partaourides, Athanasios Balomenos, Yannis Kopsinis, Sotirios Chatzis
2025	—	`conf`	CMAD: Conditional Modeling-Adapter Diffusion for Video Super-Resolution. ISVC (2) Chengzhang Wang, Jiahao Nie, Zhiwei He, Sotirios Chatzis
2025	—	`conf`	Gaze Prediction in Virtual Reality Without Eye Tracking Using Visual and Head Motion Cues. ISVC (1) Christos Petrou, Harris Partaourides, Athanasios Balomenos, Yannis Kopsinis, Sotirios Chatzis
2024	J	`jnl`	Continual Deep Learning on the Edge via Stochastic Local Competition among Subnetworks. CoRR Theodoros Christophides, Kyriakos Tolias, Sotirios Chatzis
2024	J	`jnl`	Transformers with Stochastic Competition for Tabular Data Modelling. CoRR Andreas Voskou, Charalambos Christoforou, Sotirios Chatzis
2023	—	`conf`	A New Dataset for End-to-End Sign Language Translation: The Greek Elementary School Dataset. ICCV (Workshops) Andreas Voskou, Konstantinos P. Panousis, Harris Partaourides, Kyriakos Tolias, Sotirios Chatzis
2023	J	`jnl`	A New Dataset for End-to-End Sign Language Translation: The Greek Elementary School Dataset. CoRR Andreas Voskou, Konstantinos P. Panousis, Harris Partaourides, Kyriakos Tolias, Sotirios Chatzis
2023	J	`jnl`	Continuous authentication with feature-level fusion of touch gestures and keystroke dynamics to solve security and usability issues. Comput. Secur. Ioannis Stylios, Sotirios Chatzis, Olga Thanou, Spyros Kokolakis
2023	A*	`conf`	DISCOVER: Making Vision Networks Interpretable via Competition and Dissection. NeurIPS Konstantinos P. Panousis, Sotirios Chatzis
2023	J	`jnl`	DISCOVER: Making Vision Networks Interpretable via Competition and Dissection. CoRR Konstantinos P. Panousis, Sotirios Chatzis
2022	—	`conf`	A Deep Learning Approach for Dynamic Balance Sheet Stress Testing. ICAIF Anastasios Petropoulos, Vasilis Siakoulis, Konstantinos P. Panousis, Loukas Papadoulas, Sotirios Chatzis
2022	J	`jnl`	BioGames: a new paradigm and a behavioral biometrics collection tool for research purposes. Inf. Comput. Secur. Ioannis Stylios, Spyros Kokolakis, Andreas Skalkos, Sotirios Chatzis
2022	A*	`conf`	Competing Mutual Information Constraints with Stochastic Competition-Based Activations for Learning Diversified Representations. AAAI Konstantinos P. Panousis, Anastasios Antoniadis, Sotirios Chatzis
2022	J	`jnl`	Competing Mutual Information Constraints with Stochastic Competition-based Activations for Learning Diversified Representations. CoRR Konstantinos P. Panousis, Anastasios Antoniadis, Sotirios Chatzis
2022	J	`jnl`	Key factors driving the adoption of behavioral biometrics and continuous authentication technology: an empirical research. Inf. Comput. Secur. Ioannis Stylios, Spyros Kokolakis, Olga Thanou, Sotirios Chatzis
2022	J	`jnl`	Rethinking Bayesian Learning for Data Analysis: The Art of Prior and Inference in Sparsity-Aware Modeling. CoRR Lei Cheng, Feng Yin, Sergios Theodoridis, Sotirios Chatzis, Tsung-Hui Chang
2022	J	`jnl`	Rethinking Bayesian Learning for Data Analysis: The art of prior and inference in sparsity-aware modeling. IEEE Signal Process. Mag. Lei Cheng, Feng Yin, Sergios Theodoridis, Sotirios Chatzis, Tsung-Hui Chang
2022	A*	`conf`	Stochastic Deep Networks with Linear Competing Units for Model-Agnostic Meta-Learning. ICML Konstantinos Kalais, Sotirios Chatzis
2022	J	`jnl`	Stochastic Deep Networks with Linear Competing Units for Model-Agnostic Meta-Learning. CoRR Konstantinos Kalais, Sotirios Chatzis
2021	J	`jnl`	Behavioral biometrics & continuous user authentication on mobile devices: A survey. Inf. Fusion Ioannis Stylios, Spyros Kokolakis, Olga Thanou, Sotirios Chatzis
2021	—	`conf`	Dialog Speech Sentiment Classification for Imbalanced Datasets. SPECOM Sergis Nicolaou, Lambros Mavrides, Georgina Tryfou, Kyriakos Tolias, Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2021	J	`jnl`	Dialog speech sentiment classification for imbalanced datasets. CoRR Sergis Nicolaou, Lambros Mavrides, Georgina Tryfou, Kyriakos Tolias, Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2021	A	`conf`	Local Competition and Stochasticity for Adversarial Robustness in Deep Learning. AISTATS Konstantinos P. Panousis, Sotirios Chatzis, Antonios Alexos, Sergios Theodoridis
2021	J	`jnl`	Local Competition and Stochasticity for Adversarial Robustness in Deep Learning. CoRR Konstantinos P. Panousis, Sotirios Chatzis, Antonios Alexos, Sergios Theodoridis
2021	J	`jnl`	Re-constructing the interbank links using machine learning techniques. An application to the Greek interbank market. Intell. Syst. Appl. Anastasios Petropoulos, Vasilis Siakoulis, Panagiotis Lazaris, Sotirios Chatzis
2021	J	`jnl`	Stochastic Local Winner-Takes-All Networks Enable Profound Adversarial Robustness. CoRR Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2021	A*	`conf`	Stochastic Transformer Networks with Linear Competing Units: Application to end-to-end SL Translation. ICCV Andreas Voskou, Konstantinos P. Panousis, Dimitrios I. Kosmopoulos, Dimitris N. Metaxas, Sotirios Chatzis
2021	J	`jnl`	Stochastic Transformer Networks with Linear Competing Units: Application to end-to-end SL Translation. CoRR Andreas Voskou, Konstantinos P. Panousis, Dimitrios I. Kosmopoulos, Dimitris N. Metaxas, Sotirios Chatzis
2021	J	`jnl`	Variational Bayesian Sequence-to-Sequence Networks for Memory-Efficient Sign Language Translation. CoRR Harris Partaourides, Andreas Voskou, Dimitrios I. Kosmopoulos, Sotirios Chatzis, Dimitris N. Metaxas
2020	Misc	`conf`	A Self-Attentive Emotion Recognition Network. ICASSP Harris Partaourides, Kostantinos Papadamou, Nicolas Kourtellis, Ilias Leontiadis, Sotirios Chatzis
2020	J	`jnl`	Gated Mixture Variational Autoencoders for Value Added Tax audit case selection. Knowl. Based Syst. Christos Kleanthous, Sotirios Chatzis
2020	J	`jnl`	Local Competition and Uncertainty for Adversarial Robustness in Deep Learning. CoRR Antonios Alexos, Konstantinos P. Panousis, Sotirios Chatzis
2020	—	`conf`	Power-law mixtures of bayesian forests for value added tax audit case selection. ICAIF Christos Kleanthous, Theodoros Christophides, Sotirios Chatzis
2020	—	`conf`	Variational Bayesian Sequence-to-Sequence Networks for Memory-Efficient Sign Language Translation. ISVC (2) Harris Partaourides, Andreas Voskou, Dimitrios I. Kosmopoulos, Sotirios Chatzis, Dimitris N. Metaxas
2020	J	`jnl`	Variational Conditional-Dependence Hidden Markov Models for Human Action Recognition. CoRR Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2019	J	`jnl`	A Self-Attentive Emotion Recognition Network. CoRR Harris Partaourides, Kostantinos Papadamou, Nicolas Kourtellis, Ilias Leontiadis, Sotirios Chatzis
2019	A*	`conf`	Nonparametric Bayesian Deep Networks with Local Competition. ICML Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2018	J	`jnl`	Amortized Context Vector Inference for Sequence-to-Sequence Networks. CoRR Sotirios Chatzis, Aristotelis Charalampous, Kyriacos Tolias, Sotiris A. Vassou
2018	J	`jnl`	Deep learning with Expert Syst. Appl. Harris Partaourides, Sotirios Chatzis
2018	J	`jnl`	Deep learning with t-exponential Bayesian kitchen sinks. CoRR Harris Partaourides, Sotirios Chatzis
2018	J	`jnl`	Nonparametric Bayesian Deep Networks with Local Competition. CoRR Konstantinos P. Panousis, Sotirios Chatzis, Sergios Theodoridis
2018	J	`jnl`	Quantum Statistics-Inspired Neural Attention. CoRR Aristotelis Charalampous, Sotirios Chatzis
2018	—	`conf`	The Good, the Bad and the Bait: Detecting and Characterizing Clickbait on YouTube. IEEE Symposium on Security and Privacy Workshops Savvas Zannettou, Sotirios Chatzis, Kostantinos Papadamou, Michael Sirivianos
2018	J	`jnl`	t-Exponential Memory Networks for Question-Answering Machines. CoRR Kyriakos Tolias, Sotirios Chatzis
2017	J	`jnl`	Recurrent Latent Variable Networks for Session-Based Recommendation. CoRR Sotirios Chatzis, Panayiotis Christodoulou, Andreas S. Andreou
2016	J	`jnl`	A Nonstationary Hidden Markov Model with Approximately Infinitely-Long Time-Dependencies. Int. J. Artif. Intell. Tools Sotirios Chatzis, Dimitrios I. Kosmopoulos, George Papadourakis
2016	—	`conf`	Users' Attitudes on Mobile Devices: Can Users' Practices Protect their Sensitive Data? MCIS Ioannis Stylios, Spyros Kokolakis, Olga Thanou, Sotirios Chatzis
2014	—	`conf`	Developing Public Transport Network systems: The DIANA approach. Panhellenic Conference on Informatics Dimitrios I. Kosmopoulos, M. Kalohristianakis, Athanasios G. Malamos, Sotirios Chatzis, M. Pternea, Konstantinos L. Kepaptsoglou, Matthew G. Karlaftis
2014	A*	`conf`	Dynamic Bayesian Probabilistic Matrix Factorization. AAAI Sotirios Chatzis
2014	A*	`conf`	Echo-State Conditional Restricted Boltzmann Machines. AAAI Sotirios Chatzis
2013	—	`conf`	Infinite Markov-Switching Maximum Entropy Discrimination Machines. ICML (3) Sotirios Chatzis
2013	A	`conf`	Nonparametric bayesian multitask collaborative filtering. CIKM Sotirios Chatzis
2011	J	`jnl`	A variational Bayesian methodology for hidden Markov models utilizing Student's-t mixtures. Pattern Recognit. Sotirios Chatzis, Dimitrios I. Kosmopoulos
2010	J	`jnl`	A method for training finite mixture models under a fuzzy clustering principle. Fuzzy Sets Syst. Sotirios Chatzis
2009	J	`jnl`	Factor Analysis Latent Subspace Modeling and Robust Fuzzy Clustering Using t -Distributions. IEEE Trans. Fuzzy Syst. Sotirios Chatzis, Theodora A. Varvarigou
2009	J	`jnl`	Robust Sequential Data Modeling Using an Outlier Tolerant Hidden Markov Model. IEEE Trans. Pattern Anal. Mach. Intell. Sotirios Chatzis, Dimitrios I. Kosmopoulos, Theodora A. Varvarigou
2009	J	`jnl`	Vision-based production of personalized video. Signal Process. Image Commun. Dimitrios I. Kosmopoulos, Anastasios D. Doulamis, Alexandros Makris, Nikolaos D. Doulamis, Sotirios Chatzis, Stuart E. Middleton
2008	J	`jnl`	A Fuzzy Clustering Approach Toward Hidden Markov Random Field Models for Enhanced Spatially Constrained Image Segmentation. IEEE Trans. Fuzzy Syst. Sotirios Chatzis, Theodora A. Varvarigou
2008	Misc	`conf`	A robust approach towards sequential data modeling and its application in automatic gesture recognition. ICASSP Sotirios Chatzis, Dimitrios I. Kosmopoulos, Theodora A. Varvarigou
2008	J	`jnl`	Managing service level agreement contracts in OGSA-based Grids. Future Gener. Comput. Syst. Antonios Litke, Kleopatra Konstanteli, Vassiliki Andronikou, Sotirios Chatzis, Theodora A. Varvarigou
2008	J	`jnl`	Robust fuzzy clustering using mixtures of Student's-t distributions. Pattern Recognit. Lett. Sotirios Chatzis, Theodora A. Varvarigou
2008	J	`jnl`	Signal Modeling and Classification Using a Robust Latent Space Model Based on t Distributions. IEEE Trans. Signal Process. Sotirios Chatzis, Dimitrios I. Kosmopoulos, Theodora A. Varvarigou
2007	—	`conf`	A content-based image retrieval scheme allowing for robust automatic personalization. CIVR Sotirios Chatzis, Anastasios D. Doulamis, Theodora A. Varvarigou
2006	—	`conf`	A Cross Media Platform for Personalized Leisure & Entertainment: The POLYMNIA Approach. AXMEDIS Vasilios Anagnostopoulos, Sotirios Chatzis, Constantinos Lalos, Anastasios D. Doulamis, Dimitrios I. Kosmopoulos, Theodora A. Varvarigou, Helmut Neuschmied, Georg Thallinger, Stuart E. Middleton, Matthew Addis, Eduardo Bustos, Fabrizio Giorgini
2006	—	`conf`	Video Representation and Retrieval Using Spatio-temporal Descriptors and Region Relations. ICANN (2) Sotirios Chatzis, Anastasios D. Doulamis, Dimitrios I. Kosmopoulos, Theodora A. Varvarigou