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Address Head of the Group Lab on social networks: Image and Signal Analysis Group
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Research fields
Speech and language processing:
- Speech signal modelling: autoregressive/linear prediction, fractal-based nonlinear modelling, source-filter models.
- Speech recognition: segment-based speech recognition.
- Speech emotion recognition: hierarchical classification of speech emotions, speech emotion features, feature selection.
- Estimation of speech quality: acoustic analysis for quality estimation; estimation of vocal fold functionality; estimation of phonation level;
- Signal model parameter assessment;
- Development of sound mathematical models.
Image and video signal processing:
- Object recognition and segmentation using deep neural networks
- Image reconstruction by deep generative networks
- Analysis of ocular fundus optic disc, other lesions
- Analysis of images of colonic pathology to describe tumor cell subpopulations in whole-slide images
- Detection of prostate changes in multiparametric magnetic resonance imaging
- Processing of full-frame histological images by machine learning methods.
Analysis of big data and development of deep learning algorithms:
- Analysis and recognition of clonal structures in genetic data.
- Analysis of traffic (marine) data to identify traffic anomalies in LSTM and transformer deep neural networks
- Development of deep teaching/learning methods for solving classification and forecasting problems.
Awards
For outstanding annual scientific achievements, contribution to the development of science at the university and in Lithuania, and for raising the prestige of university science worldwide, in 2025 Gražina Korvel became the winner of the Rector's Science Award.
For outstanding annual scientific achievements, contribution to the development of science at the university and in Lithuania, and for raising the prestige of university science worldwide, in 2023 Povilas Treigys became the winner of the Rector's Science Award.
Science and Education
Phd Students
| Name, Surname | Supervisor | Field of study |
Theme | Time of study |
| Monika Danilovaitė | Assoc. Prof. Dr. Gintautas Tamulevičius | N 009 | Voice Quality Assessment Methodology for the Detection of Vocal Folds Disorders |
2020-2026 |
| Sobia Dastgeer | Prof. Dr. Povilas Treigys | N 009 | Enhancing Breast Cancer Recognition using Vision Transformer and Explainable AI |
2024-2028 |
| Kasparas Karlauskas | Prof. Dr. Povilas Treigys | T 007 | Three-dimensional point cloud analysis and object recognition |
2023-2027 |
| Justina Ramonaitė | Prof. Dr. Gražina Korvel | N 009 | Deep learning-based speech signal enhancement | 2023-2027 |
| Jonas Mindaugas Rimšelis | Dr. Jolita Bernatavičienė | T 007 | Development and investigation of noise removal algorithms to improve the accuracy of arrhythmia and atrial fibrillation detection in single-channel ECG signals |
2025-2029 |
| Roman Surkant | Dr. Jolita Bernatavičienė | N 009 | Development of Machine Learning and Functional Data Analysis Methods for Prostate Multiparametric MRI Analysis |
2022-2026 |
| Daniel Zakševski | Assoc. Prof. Dr. Gintautas Tamulevičius | T 007 | Deep learning models for speech enhancement | 2023-2027 |
Defended PhD thesis:
- "Hierarchical Classification of Speech Emotions", supervisor Gintautas Tamulevičius PhD, 2017.
- "Semi-supervised and Unsupervised Machine Learning Methods for Sea Traffic Anomaly Detection" supervisor Povilas Treigys PhD, 2021
- "Development of tumor microenvironment-oriented digital pathology methods for whole slide image segmentation and classification" supervisor Povilas Treigys PhD, 2021
- „Barcodeless Food Products Recognition for Retail Self-checkout Service“ supervisor Povilas Treigys PhD, 2024
- „Maritime Traffic Awareness Evaluation Using Deep Neural Networks“ supervisor Povilas Treigys PhD, 2025
- „Methodology for Applying Deep Learning Algorithms for Glaucoma Identification“ ;supervisor Jolita Bernatavičienė PhD, 2025
Defended MSc thesis:
- "Speech Analysis-based Assessment of Vocal Folds State", 2020. Supervisor: dr. Gintautas Tamulevičius.
- "Neural network based segmentation and classification of cell nuclei in whole slide histology images", 2020. Supervisor: dr. Povilas Treigys
- "Fractal Modeling of Speech Signals", 2021. Supervisor: dr. Gintautas Tamulevičius.
- "Outlier Detection in Multidimensional Streaming Data", 2021. Supervisor: dr. Jolita Bernatavičienė.
- "Autoencoder-based Modelling of Speech Signals", 2021. Supervisor: dr. Gintautas Tamulevičius.
- Šnekos signalų modeliavimas autoenkoderio tipo neuroniniais tinklais, 2021. Supervisor: dr. Gintautas Tamulevičius.
- Investigation of Eye Fundus Image Quality on Vascular Segmentation Using Deep Neural Networks. 2022. Supervisor: dr. Jolita Bernatavičienė.
- Evaluation Of Dynamic Contrast in Prostate MRI for Cancerous Tissue Identification. 2022.Supervisor:dr. Jolita Bernatavičienė.
- Forecast of Energy Produced by Solar Power Plants. 2022. Supervisor: dr. Jolita Bernatavičienė.
- Assessment of the quality of eye fundus images using machine learning methods. 2023. Supervisor – Dr. Jolita Bernatavičienė. Research of machine learning methods for noise generation. 2023. Supervisor – Dr. Povilas Treigys.
- Segmentation of Lithuanian language phonemes. 2023. Supervisor – Dr. Povilas Treigys.
- Fault identification in the electricity production process of solar power plants. 2024. Supervisor – Dr. Jolita Bernatavičienė. Fault detection in photovoltaic solar energy systems using functional data analysis methods. 2025. Supervisor – Dr. Jolita Bernatavičienė.
- Application of connectivity matrices for EEG signal classification. 2025. Supervisor – Dr. Jolita Bernatavičienė.
- Research of convolutional neural networks and multimodal models for insurance document classification. 2025. Supervisor – Dr. Povilas Treigys.
- Detection of diffraction rings in microscope images for single-molecule research. 2025. Supervisor – Dr. Povilas Treigys.
Projects
- Lithuanian state-funded project "Information Technologies for human Wellbeing - Clinical Decision support (E-Health)" 2003-2009.
- Lithuanian state-funded project "Support of Clinical Decision Systems for e. Health System" 2007-2009.
- Lithuanian state Science Foundation project "Development of Specialized data Analysis Methods for Heart Thermal Anisotropy Investigation" 2008.
- Research service "Creation of a Model for the Recognition of Individual Lithuanian Words and Phrases" 2012-2013.
- Researchers group project "Development and Inspection of the Prototype for the People with Disabilities Managed by Lithuanian Speech" 2012-2014.
- EU Structural funds project "Lithuanian Speech Guided Services" 2013-2015 m.
- Eurostars project "Production Effectiveness Navigator" 2011-2013.
- Projects of EU Structural Funds LIEPA (Services Controlled by Lithuanian Voice), 2013-2015
- Erasmus+ programme project "Partnerships to Ensure Risk Management in Practice" 2015-2016 m.
- Projects of EU Structural Funds LIEPA2, 2017.12-2020.12
- Postdoctoral Project “Analysis and Modeling of Promises Using the Joint Additive Synthesis and Source-Filter Model Method”, 2018-12-2019.12
- COST Action CA15124 „A new Network of European BioImage Analysts to advance life science imaging (NEUBIAS)“. 2016-2020 m
- COST Action CA15225 "Fractional-order systems - analysis, synthesis and their importance for future design", 2016-2020
- COST Action CA18231 "Multi3Generation: Multi-task, Multilingual, Multi-modal Language Generation", 2019-2023.
- COVID‑19 Infection in Lithuania: modelling and analysis of socio‑economic impacts, Project No. P‑COV‑20‑4. 2020‑06 – 2020‑12‑31.
- National Competence Centres in the framework of EuroHPC, H2020, Project duration 2020-9-1 – 2022-8-31, Project Reference: 951732,
- Postdoctoral Project “Investigating speech in the presence of noise interferences employing signal processing and machine learning methods”, 2021-07-2023.07
- Lithuanian Research Council (LMT) commissioned study, Project No. S‑VIS‑23‑8 “Propaganda and disinformation research: machine learning‑based automatic recognition, impact and societal resilience”. 2023‑09‑01 – 2026‑06‑30.
- Lithuanian Research Council (LMT) project No. S‑SV‑24‑101 “Application of natural language processing methods to identify clinical terms in electronic records”. 2024‑07‑01 – 2024‑08‑30.
- EDIH VILNIUS: accelerating green and digital transformation in the Vilnius region, Grant Agreement No. 101083844. 2024‑02‑15 – 2024‑08‑23 (work performed under agreement with Vilnius University Hospital Santaros Klinikos).
- Creation of the Great Lithuanian Speech Corpus (LIEPA‑3), Project No. 02‑023‑K‑0001. 2024‑03‑12 – 2026‑04‑30.
- Lithuanian Research Council (LMT) research group project No. S‑MIP‑24‑118 “Human‑perception‑inspired speech signal enhancement: integrating deep learning, noise profiling and auditory knowledge”. 2024‑09‑02 – 2027‑08‑31.
- Noise‑reduction diffusion probabilistic models for ECG arrhythmia classification and atrial fibrillation (AFIB) detection, Project No. S‑ITP‑25‑9. 2025–2027.
History
The group was founded in 2017 by reorganizing the structure of the Institute of Mathematics and Informatics of Vilnius University.
Staff and PhD students
Employees |
Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 623, Vilnius |
Dr. Jolita Bernatavičienė Department: Image and Signal Analysis Group
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Prof. Habil. Dr. Kazys Kazlauskas Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 214, Vilnius |
Prof. Dr. Gražina Korvel Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 627, Vilnius |
Tautvydas Naudžiūnas Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
Gediminas Navickas Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 616, Vilnius |
Assoc. Prof. Dr. Gintautas Tamulevičius Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 207, Vilnius |
Steponas Tolomanovas Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 616, Vilnius |
Phd students |
Monika Danilovaitė Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
Sobia Dastgeer Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
Kasparas Karlauskas Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 608A, Vilnius |
Justina Ramonaitė Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
Jonas Mindaugas Rimšelis Department: Image and Signal Analysis Group Address: Akademijos st. 4, room 608A, Vilnius |
Roman Surkant Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
Daniel Zakševski Department: Image and Signal Analysis Group Address: Akademijos st. 4, Vilnius |
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