Image and Signal Analysis Group - Institute of Data Science and Digital Technologies

Structure

Address
Akademijos st. 4, room 623
Vilnius, Lithuania

Head of the Group
dr. Povilas Treigys

Tel: +370 5 210 9328
E-mail:

Lab on social networks:

Image and Signal Analysis Group

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

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

Staff and PhD students

Employees

povilastreigys

Prof. Dr. Povilas Treigys

Department: Image and Signal Analysis Group
Position: Principal Researcher, Professor, Head of Group

Address: Akademijos st. 4, room 623, Vilnius
Tel: +370 5 210 9328
E-mail:

Social profile:

Dr. Jolita Bernatavičienė

Department: Image and Signal Analysis Group
Position: Senior Researcher, Project Expert, Project Principal Researcher

Address: Akademijos str. 4, room 627, Vilnius
Tel: +370 5 210 9315
E-mail:

Prof. Habil. Dr. Kazys Kazlauskas

Department: Image and Signal Analysis Group
Position: Affiliated Researcher

Address: Akademijos st. 4, room 214, Vilnius
Tel: +370 5 210 9319
E-mail:

grazina korvel

Prof. Dr. Gražina Korvel

Department: Image and Signal Analysis Group
Position: Senior Researcher, Project Principal Researcher, Project Manager, Professor

Address: Akademijos st. 4, room 627, Vilnius
Tel: +370 5 210 9315
E-mail:

Tautvydas Naudžiūnas

Department: Image and Signal Analysis Group
Position: Laboratory Technician

Address: Akademijos st. 4, Vilnius
E-mail:

Gediminas Navickas

Gediminas Navickas

Department: Image and Signal Analysis Group
Position: Lecturer, Project Expert

Address: Akademijos st. 4, room 616, Vilnius
Phone: +370 5 210 9308
E-mail:

Social profile:

gintautast

Assoc. Prof. Dr. Gintautas Tamulevičius

Department: Image and Signal Analysis Group
Position: VU Institute of Data Science and Digital Technologies Director, Senior Researcher, Assoc. Professor, Project Principal Researcher

Address: Akademijos st. 4, room 207, Vilnius
Tel: +370 5 210 9302
E-mail:

Social profile:

Steponas Tolomanovas

Department: Image and Signal Analysis Group
Position: Specialist

Address: Akademijos st. 4, room 616, Vilnius
E-mail:

Phd students

Monika Danilovaitė

Department: Image and Signal Analysis Group
Position: PhD student
Field: Informatics

Address: Akademijos st. 4, Vilnius
E-mail:

Sobia Dastgeer

Department: Image and Signal Analysis Group
Position: PhD student
Field: Informatic

Address: Akademijos st. 4, Vilnius
E-mail:

Kasparas Karlauskas

Department: Image and Signal Analysis Group
Position: PhD student
Field: Informatics Engineering

Address: Akademijos st. 4, room 608A, Vilnius
E-mail:

Justina Ramonaitė

Department: Image and Signal Analysis Group
Position: PhD student, Junior Researcher, Senior Project Specialist
Field: Informatics

Address: Akademijos st. 4, Vilnius
E-mail:

Jonas Mindaugas Rimšelis

Department: Image and Signal Analysis Group
Position: PhD student, Junior Researcher
Field: Informatics Engineering

Address: Akademijos st. 4, room 608A, Vilnius
E-mail:

Roman Surkant

Department: Image and Signal Analysis Group
Position: PhD student
Field: Informatics

Address: Akademijos st. 4, Vilnius
E-mail:

Daniel Zakševski

Department: Image and Signal Analysis Group
Position: PhD student, Junior Researcher
Field: Informatics Engineering

Address: Akademijos st. 4, Vilnius
E-mail: