Projects per year
Organisation profile
Organisation Profile
Inverse Problems Reserch Group in University of Helsinki
Inverse problems research lies at the intersection of pure and applied mathematics. The forward problem corresponding to an inverse problem is usually a well defined problem in physics, engineering or medical imaging. What is inverted in an inverse problem is the causality: Whereas in a forward problem we start from the causes and end up with the results, in an inverse problem we start with partial knowledge of the causes and the result and infer more about the causes.
International and National Collaboration
Profiles
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Tatiana Bubba
- Inverse Problems
- Doctoral Programme in Mathematics and Statistics - Supervisor for doctoral programme
Person: U2 Teaching and research staff
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Tommi Heikkilä
- Department of Mathematics and Statistics - Visiting scholar
- Inverse Problems
Person: Visiting scholar
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Markus Juvonen
- Department of Mathematics and Statistics - Doctoral Researcher
- Inverse Problems
- Doctoral Programme in Mathematics and Statistics
Person: U1 Research and teaching staff, Doctoral Researcher
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Elli Kaisa Kristiina Karvonen
- Department of Mathematics and Statistics - Doctoral Researcher
- Inverse Problems
- Doctoral Programme in Mathematics and Statistics
Person: U1 Research and teaching staff, Doctoral Researcher
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Centre of Excellence in Inverse Modelling and Imaging
Lassas, M. (Project manager), Siltanen, S. (Principal Investigator), Piiroinen, P. (Participant), Bubba, T. (Participant), Balehowsky, T. (Participant), Meaney, A. (Participant), Kujanpää, A. (Participant), Liimatainen, T. J. (Participant), Ylinen, L. (Participant), Korpela, J. (Participant), Helin, T. (Participant), Santacesaria, M. (Participant), Kyriakopoulou, D. (Participant), Mach, M. (Participant), Zhang, Z. (Participant), Murthy, R. (Participant), Dunlop, M. (Participant), Rautio, S. I. (Participant), Purisha, Z. (Participant), Juvonen, M. (Participant), Hyttinen, V. (Participant), Virtanen, H. (Participant), Suomenrinne-Nordvik, A. (Participant), Lehtonen, J. (Participant), Ola, P. (Participant), Ratti, L. (Participant), Partio, H. (Other), Latva-Äijö, S.-M. (Participant), Enwald, J. (Participant), Tyni, T. K. (Participant), Agnelli, J. P. (Participant), Silva de Moura, F. (Participant), Oksanen, L. (Principal Investigator), Heikkilä, T. (Participant), Blåsten, E. (Participant), Lu, J. (Participant), Meyerson, R. C. (Participant), Karvonen, E. K. K. (Participant), Suonperä, E. E. M. (Participant), Jensen, B. C. S. (Participant), Valkonen, T. (Principal Investigator) & Nursultanov, M. (Participant)
01/01/2018 → 31/12/2025
Project: Research project
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Electrical Impedance Tomography - a Novel Method for Improved Diagnostics of Stroke
Kolehmainen, V. (Project manager), Siltanen, S. (Co-Principal Investigator), Forss, N. H. (Co-Principal Investigator), Hyttinen, J. (Co-Principal Investigator) & Hyvonen, N. (Co-Principal Investigator)
01/01/2021 → 31/12/2023
Project: Research project
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Non-linear tomography with active and passive radiation
Bubba, T. (Project manager)
01/09/2020 → 31/08/2023
Project: Research project
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Artificial intelligence guided diagnostics in medical imaging
Nieminen, M. T. (Project manager), Siltanen, S. (Co-Principal Investigator) & Saarakkala, S. (Co-Principal Investigator)
01/01/2019 → 31/12/2021
Project: Research project
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An Inverse Problem for a Semi-linear Wave Equation: A Numerical Study
Lassas, M., Liimatainen, T., Potenciano-Machado, L. & Tyni, T., Feb 2024, In: Inverse problems and imaging. 18, 1, p. 62-85 24 p.Research output: Contribution to journal › Article › Scientific › peer-review
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An inverse problem for the Riemannian minimal surface equation
Carstea, C. I., Lassas, M., Liimatainen, T. & Oksanen, L., 15 Jan 2024, In: Journal of Differential Equations. 379, p. 626-648 23 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open Access -
A nonsmooth primal-dual method with interwoven PDE constraint solver
Jensen, B. & Valkonen, T., 8 Jun 2024, In: Computational Optimization and Applications. 89, p. 115–149 35 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Applications of the Stone-Weierstrass theorem in the Calderón problem
Liimatainen, T. & Salo, M., 2024, In: Annales Fennici Mathematici. 49, 2, p. 583-600 18 p.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Bilevel learning of regularization models and their discretization for image deblurring and super-resolution
Bubba, T. A., Calatroni, L., Catozzi, A., Crisci, S., Pock, T., Pragliola, M., Rautio, S., Riccio, D. & Sebastiani, A., 3 Oct 2024, Advanced Techniques in Optimization for Machine learning and Imaging (ATOMI 2022). Benfenati, A., Porta, F., Bubba, T. A. & Viola, M. (eds.). Springer Singapore, p. 55–81 27 p. (Springer INdAM Series; vol. 61).Research output: Chapter in Book/Report/Conference proceeding › Chapter › Scientific › peer-review
Open Access
Activities
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Workshop on Statistics, Machine Learning and Applications
Piiroinen, P. (Speaker)
7 Oct 2024Activity: Talk or presentation types › Invited talk
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Workshop on Statistics, Machine Learning and Applications
Piiroinen, P. (Speaker)
2 Oct 2023Activity: Talk or presentation types › Invited talk
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Spectral X-ray and material decomposition research
Latva-Äijö, S.-M. (Speaker)
22 Jun 2022Activity: Talk or presentation types › Oral presentation
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Spectral X-ray material decomposition research
Latva-Äijö, S.-M. (Speaker)
14 Jun 2022Activity: Talk or presentation types › Oral presentation
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Material separating regularizer for multi-energy X-ray tomography
Latva-Äijö, S.-M. (Speaker)
26 Apr 2022Activity: Talk or presentation types › Oral presentation
File
Prizes
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Suomen matemaattisen yhdistyksen Matematiikkapalkinto
Siltanen, S. (Recipient), 2019
Prize: Prizes and awards
Datasets
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Gel phantom data for dynamic X-ray tomography
Heikkilä, T. (Creator), Meaney, A. (Creator) & Help-Rinta-Rahko, H. (Creator), Zenodo, 5 Mar 2020
DOI: 10.5281/zenodo.3696816, https://doi.org/10.5281/zenodo.3696816 and one more link, https://arxiv.org/abs/2003.02841 (show fewer)
Dataset
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Cone-beam gel phatom data for dynamic X-ray tomography
Heikkilä, T. (Creator), Meaney, A. (Creator) & Help-Rinta-Rahko, H. (Creator), Zenodo, 28 Apr 2023
Dataset
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Helsinki Deblur Challenge 2021 open photographic dataset
Juvonen, M. (Creator), Moura, F. (Creator) & Siltanen, S. (Creator), Zenodo, 9 Jun 2021
Dataset
Press/Media
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Esiintyminen YLE Aamu-TV:n Jälkikaronkka- ohjelmassa
27/10/2021
1 item of Media coverage
Press/Media: Press / Media
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Tietokirjailijat ry:n podcast: Voiko brainy books -kirjoja lukemalla fiksuuntua?
30/09/2021
1 Media contribution
Press/Media: Press / Media
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Esiintyminen YLE Aamu-TV:n Jälkikaronkka- ohjelmassa
25/08/2021
1 item of Media coverage
Press/Media: Press / Media
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Esiintyminen YLE Aamu-TV:n Jälkikaronkka- ohjelmassa
28/07/2021
1 item of Media coverage
Press/Media: Press / Media
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