Selected Publications

2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2015 · 2014 · 2012 · 2010

2026

  • Petsangourakis, G., Sgouropoulos, C., Psomas, B., Giannakopoulos, T., Sfikas, G., & Kakogeorgiou, I. Reglue Your Latents with Global and Local Semantics for Entangled Diffusion European Conference on Computer Vision (ECCV), pp. 444-463, Springer doi
  • Prokopiou, I., Vikatos, P., Kaliakatsos-Papakostas, M., Giannakopoulos, T., & Stafylakis, T. Latent Space Disentanglement via Activation Steering for Interpretable Attribute Control in Symbolic Music Generation 34th European Signal Processing Conference (EUSIPCO), Bruges, Belgium doi
  • Koromilas, P., Giannakopoulos, T., Nicolaou, M. A., & Panagakis, Y. Neural Collapse by Design: Learning Class Prototypes on the Hypersphere 43rd International Conference on Machine Learning (ICML) doi
  • Eleftheriou, S., Giannakopoulos, T., Stafylakis, T., & Androutsopoulos, I. From Pretraining to Robustness: Benchmarking SSL Models for Noise-Robust Speech Emotion Recognition ICASSP 2026, IEEE, Barcelona, pp. 19497-19501 doi
  • Gini, M., Vratolis, S., Manousakas, M., Diapouli, E., Granakis, K., Amvrosia, V. E., Konstantopoulos, S., Giannakopoulos, T., Malik, A., Ondracek, J., Zdimal, V., Močnik, G., Vasilatou, K., Nowak, A., & Eleftheriadis, K. Ultrafine, Solid Particles and Black Carbon Near Real Time Assessment and Critical Properties at a Traffic Hotspot MI-TRAP Monitoring Station in Athens EGU General Assembly, Vienna, EGU26-21010 doi

2025

  • Koromilas, P., Georgiou, E., Bouritsas, G., Giannakopoulos, T., Nicolaou, M. A., & Panagakis, Y. Rethinking Objectives for Multi-View and Multi-Modal Contrastive Learning UniReps Workshop, Conference on Neural Information Processing Systems (NeurIPS)
  • Vlachos, S., Theiou, V., Sgouropoulos, C., Nikou, C., & Giannakopoulos, T. An AI-Powered Framework for Streamlined Image and Audio Annotations Artificial Intelligence for Security and Defence Applications III, Vol. 13679, pp. 495-513, SPIE doi
  • Nikou, C., & Giannakopoulos, T. Contrastive and Transfer Learning for Effective Audio Fingerprinting through a Real-World Evaluation Protocol IJMSTA, 7(1), 68-82 doi
  • Sgouropoulos, C., Nikou, C., Vlachos, S., Theiou, V., Foukanelis, C., & Giannakopoulos, T. Prototypical Contrastive Learning For Improved Few-Shot Audio IEEE MLSP doi
  • Nikou, C., Theiou, V., Vlachos, S., Sgouropoulos, C., Sgouropoulos, D., & Giannakopoulos, T. On the Robustness of State-of-the-Art Transformers for Sound Event Classification Against Black Box Adversarial Attacks 2025 EUSIPCO. IEEE doi

2024

  • Koromilas, P., Bouritsas, G., Giannakopoulos, T., Nicolaou, M., & Panagakis, Y. Bridging Mini-Batch and Asymptotic Analysis in Contrastive Learning: From InfoNCE to Kernel-Based Losses Forty-first International Conference on Machine Learning doi
  • Mitsou, A., Petrogianni, A., Vakalaki, E. A., Nikou, C., Psallidas, T., & Giannakopoulos, T. A multimodal dataset for electric guitar playing technique recognition Data in Brief, Vol 52 doi
  • Kaliosis, P., Eleftheriou, S., Nikou, C., & Giannakopoulos, T. A self-supervised learning approach for detecting non-psychotic relapses using wearable-based digital phenotyping 2024 IEEE ICASSPW. IEEE doi
  • Petrogianni, A., Kapelonis, L., Antoniou, N., Eleftheriou, S., Mitseas, P., Sgouropoulos, D., Katsamanis, N., Giannakopoulos, T., & Narayanan, S. RobuSER: A robustness Benchmark for Speech Emotion Recognition 2024 12th International Conference on Affective Computing and Intelligent Interaction (ACII) (pp. 1-7). IEEE doi
  • Eleftheriadis, K., Gini, M., Manousakas, M., Diapouli, E., Vratolis, S., Papagiannis, S., Zografou, O., Giannakopoulos, T., Konstantopoulos, S., Mocnik, G., & Drinovec, L. MItigating Transport-Related Air Pollution in Europe: The MI-TRAP project The European Aerosol Conference
  • Sgouropoulos, D., Mitseas, P., Eleftheriou, S., Giannakopoulos, T., Petrogianni, A., Kapelonis, L., Antoniou, N., Katsamanis, A., & Narayanan, S. Emotion-aware speech popularity prediction: a use-case on TED talks 2024 12th International Conference on Affective Computing and Intelligent Interaction (ACII). IEEE doi
  • Gkritzali, E., Kaliosis, P., Galanaki, S., Palogiannidi, E., & Giannakopoulos, T. Greek2MathTex: A Greek Speech-to-Text Framework for LaTeX Equations Generation 13th Helenic Conference on AI, SETN 2024, Piraeus, Greece, September 11-13, 2024. Proceedings 4 doi

2023

  • Melistas, T., Kapelonis, L., Antoniou, N., Mitseas, P., Sgouropoulos, D., Giannakopoulos, T., Katsamanis, A., Narayanan, S., & Demokritos, N.C.S.R. Cross-lingual features for alzheimer's dementia detection from speech Proc. INTERSPEECH (pp. 3008-3012) doi
  • Christopoulos, D., Chatzi, E., Sofianopoulos, G., Patiniotaki, E., Eleftheriou, S., Koromilas, P., Kaliosis, P., Gkouti, N., Giannakopoulos, T., Petridis, K., & Sismanidou, E. Smart Subs Subtitling App for Watching Live Virtual Dome Performances 2023 SMAP. IEEE doi
  • Bochalis, C., Vargas, C. D., Jarvis, E. D., & Giannakopoulos, T. Unsupervised Temporal Analysis of Mouse Vocalizations 2023 IEEE Conference on Computational Intelligence in Bioinformatics and Computational Biology (CIBCB) (pp. 1-8). IEEE doi
  • Petrogianni, A., Vassilakis, D., Klampanos, I. A., Giannakopoulos, T., & Andreopoulou, A. Jazz Mapping: An Advanced Framework for Solo Analysis and Discovery in Jazz Music Audio Engineering Society Convention 155
  • Koromilas, P., Nicolaou, M. A., Giannakopoulos, T., & Panagakis, Y. MMATR: A Lightweight Approach for Multimodal Sentiment Analysis Based on Tensor Methods ICASSP 2023-2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (pp. 1-5). IEEE doi
  • Antoniou, N., Katsamanis, A., Giannakopoulos, T., & Narayanan, S. Designing and Evaluating Speech Emotion Recognition Systems: A reality check case study with IEMOCAP ICASSP 2023-2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (pp. 1-5). IEEE doi

2022

  • Alygizakis, N., Giannakopoulos, T., Τhomaidis, N. S., & Slobodnik, J. Detecting the sources of chemicals in the Black Sea using non-target screening and deep learning convolutional neural networks Science of The Total Environment, 157554 doi
  • Petrogianni, A., Koromilas, P., & Giannakopoulos, T. Film Shot Type Classification Based on Camera Movement Styles Iberian Conference on Pattern Recognition and Image Analysis (pp. 602-615) doi
  • M. Moutti, S. Eleftheriou, P. Koromilas, T. Giannakopoulos A Dataset for Speech Emotion Recognition in Greek Theatrical Plays 13th Conference on Language Resources and Evaluation (LREC 2022), pages 1040–1046 doi
  • Tsitos, A. C., Dagioglou, M., & Giannakopoulos, T. Real-time feasibility of a human intention method evaluated through a competitive human-robot reaching game 2022 ACM/IEEE International Conference on Human-Robot Interaction (pp. 1080-1084) doi
  • Dagioglou, M., Soulounias, N., & Giannakopoulos, T. Object Size Prediction from Hand Movement Using a Single RGB Sensor International Conference on Human-Computer Interaction (pp. 369-386) doi
  • Touros, G., & Giannakopoulos, T. Video soundtrack evaluation with machine learning: Data availability, feature extraction, and classification Advances in Speech and Music Technology doi
  • Moutti, M., Eleftheriou, S., Koromilas, P., & Giannakopoulos, T. Cross linguistic speech emotion recognition using CNNs: a use-case in Greek Theatrical Data Proceedings of the 15th International Conference on PErvasive Technologies Related to Assistive Environments (pp. 662-667) doi
  • Zouros, M., & Giannakopoulos, T. Photography Style Analysis using Convolutional Neural Networks 2022 SITIS. IEEE doi
  • Stoumpou, V., Vargas, C. D., Schade, P. F., Boyd, J. L., Giannakopoulos, T., & Jarvis, E. D. Analysis of Mouse Vocal Communication (AMVOC): a deep, unsupervised method for rapid detection, analysis and classification of ultrasonic vocalisations Bioacoustics, 1-31 doi
  • Geroulanos, A., & Giannakopoulos, T. Emotion Recognition in Music Using Deep Neural Networks Advances in Speech and Music Technology: Computational Aspects and Applications. Cham: Springer International Publishing, 193-213 doi
  • Papaioannou, C., Valiantzas, I., Giannakopoulos, T., Kaliakatsos Papakostas, M., & Potamianos, A. A Dataset for Greek Traditional and Folk Music: Lyra 23rd International Society for Music Information Retrieval Conference (ISMIR 2022) doi
  • Chatziagapi, A., Sgouropoulos, D., Karouzos, C., Melistas, T., Giannakopoulos, T., Katsamanis, A., & Narayanan, S. Audio and ASR-based Filled Pause Detection 2022 10th International Conference on Affective Computing and Intelligent Interaction (ACII) (pp. 1-7). IEEE doi

2021

  • Koromilas, P., & Giannakopoulos, T. Deep multimodal emotion recognition on human speech: A review Applied Sciences, 11(17), 7962 doi
  • Paraskevoudis, K., & Giannakopoulos, T. Instrument Playing Technique Recognition: A Greek Music Use Case In Worldwide Music Conference (pp. 124-136). Springer doi
  • Psallidas, T., Koromilas, P., Giannakopoulos, T., & Spyrou, E. Multimodal Summarization of User-Generated Videos Applied Sciences, 11(11), 5260. doi
  • Eleftheriou, S., Koromilas, P., & Giannakopoulos, T. Automatic Assessment of Speaking Skills Using Aural and Textual Information Proceedings of The Fourth International Conference on Natural Language and Speech Processing (ICNLSP 2021) (pp. 166-1)
  • Melistas, T., & Giannakopoulos, T. Lyrics and Vocal Melody Generation conditioned on Accompaniment Proceedings of the 2nd Workshop on NLP for Music and Spoken Audio (NLP4MusA)

2020

  • Psallidas, T., Mitsou, A., Pikramenos, G., Spyrou, E., & Giannakopoulos, T. ARCHEO: A Dataset for Sound Event Detection in Areas of Touristic Interest 2020 15th International Workshop on Semantic and Social Media Adaptation and Personalization (SMA (pp. 1-6). IEEE. doi

2019

  • Giannakopoulos, T., Orfanidi, M., & Perantonis, S. Athens Urban Soundscape (ATHUS): A Dataset for Urban Soundscape Quality Recognition. In International Conference on Multimedia Modeling (pp. 338-348). Springer, Cham. doi
  • Giannakopoulos, T., & Perantonis, S. Recognizing the quality of urban sound recordings using hand-crafted and deep audio features Proceedings of the 12th ACM International Conference on PErvasive Technologies Related to Assistive Environments doi
  • Paraskevopoulos, G., Spyrou, E., Sgouropoulos, D., Giannakopoulos, T., & Mylonas, P. Real-Time Arm Gesture Recognition Using 3D Skeleton Joint Data Algorithms, 12(5), 108 doi
  • Chatziagapi, A., Paraskevopoulos, G., Sgouropoulos, D., Pantazopoulos, G., Nikandrou, M., Giannakopoulos, T., Katsamanis, A., Potamianos, A., & Narayanan, S. Data Augmentation Using GANs for Speech Emotion Recognition Proc. Interspeech 2019, 171-175 doi
  • Paraskevopoulos, G., Tzinis, E., Ellinas, N., Giannakopoulos, T., & Potamianos, A. Unsupervised Low-Rank Representations for Speech Emotion Recognition Proc. Interspeech 2019, 939-943 doi

2018

  • Papakostas, Michalis, and Theodoros Giannakopoulos Speech-music discrimination using deep visual feature extractors Expert Systems with Applications 114 (2018): 334-344. doi
  • Sarafianos, N., Giannakopoulos, T., Nikou, C., & Kakadiaris, I. A. Curriculum learning of visual attribute clusters for multi-task classification Pattern Recognition, 80, 94-108. doi
  • Bougiatiotis, Konstantinos, and Theodoros Giannakopoulos Enhanced movie content similarity based on textual, auditory and visual information. Expert Systems with Applications 96 (2018): 86-102. doi

2017

  • Papakostas, M., Tsiakas, K., Giannakopoulos, T., & Makedon, F. Towards predicting task performance from EEG signals 2017 IEEE International Conference on Big Data (Big Data) (pp. 4423-4425) doi
  • Sarafianos, N., Giannakopoulos, T., Nikou, C., & Kakadiaris, I. A. Curriculum learning for multi-task classification of visual attributes 2017 In Proceedings of the IEEE International Conference on Computer Vision Workshops (pp. 2608-2615) doi
  • Giannakopoulos, T., & Konstantopoulos, S. Daily Activity Recognition based on Meta-classification of Low-level Audio Events Proceedings of ICT4AWE2017, ISBN: 978-989-758-251-6 doi
  • Giannakopoulos, T., Konstantopoulos, S., Siantikos, G., & Karkaletsis, V. Design for a System of Multimodal Interconnected ADL Recognition Services Components and Services for IoT Platforms, pp. 323-333. Springer International Publishing doi

2016

  • Giannakopoulos, T., & Siantikos, G. A ROS Framework for Audio-Based Activity Recognition Proceedings of the 9th ACM International Conference on PErvasive Technologies Related to Assistive Environments (PETRA 2016) doi
  • Nivolianitou, Z. S., Koromila, I. A., & Giannakopoulos, T. Bayesian network to predict environmental risk of a possible ship accident International Journal of Risk Assessment and Management, 19(3), 228-239 doi
  • Papakostas, M., Giannakopoulos, T., & Makedon, F. Short-term Recognition of Human Activities using Convolutional Neural Networks 2016 International Conference on Signal-Image Technology & Internet Based Systems (SITIS). IEEE doi
  • Smailis, C., Sarafianos, N., Giannakopoulos, T., & Perantonis, S. Fusing Active Orientation Models and Mid-term Audio Features for Automatic Depression Estimation Proceedings of the 9th ACM International Conference on PErvasive Technologies Related to Assistive Environments (PETRA 2016) doi
  • Bougiatiotis, K., & Giannakopoulos, T. Content Representation and Similarity of Movies based on Topic Extraction from Subtitles Proceedings of the 9th Hellenic Conference on Artificial Intelligence. ACM doi
  • Sarafianos, N., Giannakopoulos, T., & Petridis, S. Audio-visual speaker diarization using fisher linear semi-discriminant analysis. Multimedia Tools and Applications, 75(1), 115-130 doi

2015

  • Giannakopoulos Theodoros pyaudioanalysis: An open-source python library for audio signal analysis. PloS one 10.12 (2015): e0144610. doi
  • Giannakopoulos, T., Siantikos, G., Perantonis, S., Votsi, N. E., & Pantis, J. Automatic soundscape quality estimation using audio analysis Proceedings of the 8th ACM International Conference on PErvasive Technologies Related to Assistive Environments (p. 19) doi
  • Giannakopoulos, T., Gyftakis, S., Charou, E., Perantonis, S., Nivolianitou, Z., Koromila, I., & Makrygiorgos, A. Long-term marine traffic monitoring for environmental safety in the aegean sea International Archives of the Photogrammetry, Remote Sensing Spatial Information Sciences doi
  • Sgouropoulos, D., Spyrou, E., Siantikos, G., & Giannakopoulos, T. Counting and tracking people in a smart room: An IoT approach Semantic and Social Media Adaptation and Personalization (SMAP), 2015 10th International Workshop on (pp. 1-5). IEEE doi
  • Siantikos, G., Sgouropoulos, D., Giannakopoulos, T., & Spyrou, E. Fusing multiple audio sensors for acoustic event detection Image and Signal Processing and Analysis (ISPA), 2015 9th International Symposium on (pp. 265-269). IEEE doi

2014

  • Giannakopoulos, T., & Pikrakis, A. Introduction to audio analysis: a MATLAB® approach Academic Press
  • Giannakopoulos, T., Smailis, C., Perantonis, S. J., & Spyropoulos, C. D. Realtime depression estimation using mid-term audio features AI-AM/NetMed@ECAI

2012

  • Giannakopoulos, T., & Petridis, S. Fisher linear semi-discriminant analysis for speaker diarization IEEE TASLP 20.7 (2012): 1913-1922 doi
  • Giannakopoulos, T., & Petridis, S. Detection and clustering of musical audio parts using Fisher linear semi-discriminant analysis 2012 EUSIPCO. IEEE

2010

  • Giannakopoulos, T., Makris, A., Kosmopoulos, D., Perantonis, S., & Theodoridis, S. Audio-visual fusion for detecting violent scenes in videos 2010 doi