Personal profile

Research interests

I am a researcher in computational imaging with background in inverse problems, signal processing, and machine learning. My research focuses on developing robust, adaptive methods for solving ill-posed inverse problems where data is limited, noisy, or imperfectly modeled.

I really enjoy diving into new topics and expanding my horizons in new applications.

My background/Expertise

    • Superresolution and sparsity-driven reconstruction in inverse problems

    • Convex and non-convex optimization algorithms

    • Vector field tomography and imaging with singularities

    • Multigrid and iterative methods for large-scale inverse systems

    • Data assimilation and forecasting in dynamical systems

    • Machine learning for uncertainty quantification and model correction

    • Bayesian statistcs in inverse problems

    • Finite element methods for PDEs

 

Current Research Direction: 

  • Learning Techniques for Uncertainty Reduction
    Applying data-driven methods to compensate for modeling errors and reduce uncertainties in inverse problems, with a focus on electroencephalographic (EEG) and magnetoencephalographic (MEG) brain imaging.
  • Learning-Based Prior Parameter Estimation
    Investigating machine learning strategies for tuning regularization and estimating hyperparameters in statistical inversion, particularly in Poisson inverse problems and transport-reaction equation.

Previous problems that I have been involved:

  • Superresolution in Linear Inverse Problems
    Developing adaptive reconstruction techniques using sparsity-promoting constraints to enhance spatial resolution in deconvolution and imaging systems. Applications include fluorescence microscopy and spectral feature extraction in spectroscopy
  • Data Assimilation and Forecasting
    Integrating sparse and dynamic data into predictive models using assimilation frameworks, with applications ranging from ionospheric imaging to fault-tolerant satellite communication diagnostics.
  • Vector Field Reconstruction via Tomographic Methods
    Designing tomographic approaches for reconstructing vector fields with singularities from limited measurement configurations in biomedical imaging.

 Some applications

  • Neuroimaging: EEG/MEG source localization using Bayesian and optimization-based inverse modeling; mapping focal cortical activity.

  • Biomedical Imaging: Deconvolution and superresolution in fluorescence microscopy and spectroscopy.

  • Remote Sensing & Geophysics: ionospheric  imaging to visualize and assess scintillation impact on GNSS systems.

Expertise related to UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):

  • SDG 1 - No Poverty
  • SDG 8 - Decent Work and Economic Growth

Education/Academic qualification

Inverse Problems and Computational Maths, Doctor of Philosophy, Reconstruction of Electric Fields and Source Distributions in EEG Brain Imaging, Imperial College London

1 Jan 20101 Oct 2014

Award Date: 15 Aug 2015

Bioengineering, Master in Science, Medical Image Computing, University College London

1 Sept 20081 Sept 2009

Award Date: 1 Sept 2009

Signal Processing, Master in Science, Communications & Signal Processing, Imperial College London

1 Oct 20071 Sept 2008

Award Date: 1 Nov 2008

Engineering and Signal Processing, Master in Science, Diploma of Electrical and Computer Engineer, Aristotle University of Thessaloniki

1 Oct 200230 Sept 2007

Award Date: 1 Nov 2007

External positions

Academy Researcher, Tampere University of Technology

1 Nov 20182025

Research Fellow, Aristotle University of Thessaloniki

1 Oct 201631 Dec 2017

Researcher, University of Münster

1 Oct 20141 Jul 2016

Fingerprint

Dive into the research topics where Alexandra Koulouri is active. These topic labels come from the works of this person. Together they form a unique fingerprint.
  • 1 Similar Profiles

Collaborations and top research areas from the last five years

Recent external collaboration on country/territory level. Dive into details by clicking on the dots or