Zobrazeno 1 - 10
of 259
pro vyhledávání: '"SILTANEN SAMULI"'
Autor:
Alsaker, Melody, Rautio, Siiri, Moura, Fernando, Agnelli, Juan Pablo, Murthy, Rashmi, Lassas, Matti, Mueller, Jennifer L., Siltanen, Samuli
Parallel-beam X-ray computed tomography (CT) and electrical impedance tomography (EIT) are two imaging modalities which stem from completely different underlying physics, and for decades have been thought to have little in common either practically o
Externí odkaz:
http://arxiv.org/abs/2408.12992
The Helsinki Speech Challenge 2024 (HSC2024) invites researchers to enhance and deconvolve speech audio recordings. We recorded a dataset that challenges participants to apply speech enhancement and inverse problems techniques to recorded speech data
Externí odkaz:
http://arxiv.org/abs/2406.04123
A novel reconstruction method is introduced for the severely ill-posed inverse problem of limited-angle tomography. It is well known that, depending on the available measurement, angles specify a subset of the wavefront set of the unknown target, whi
Externí odkaz:
http://arxiv.org/abs/2310.16557
Autor:
Latva-Äijö, Salla-Maaria, Zanetti, Filippo, Honkanen, Ari-Pekka, Huotari, Simo, Gondzio, Jacek, Lassas, Matti, Siltanen, Samuli
Multi-energy X-ray tomography is studied for decomposing three materials using three X-ray energies and a classical energy-integrating detector. A novel regularization term comprises inner products between the material distribution functions, penaliz
Externí odkaz:
http://arxiv.org/abs/2309.04479
Limited-angle tomography is a highly ill-posed linear inverse problem. It arises in many applications, such as digital breast tomosynthesis. Reconstructions from limited-angle data typically suffer from severe stretching of features along the central
Externí odkaz:
http://arxiv.org/abs/2201.00656
Volume conductor problems in cerebral electrophysiology and bioimpedance do not have analytical solutions for nontrivial geometries and require a 3D model of the head and its electrical properties for solving the associated PDEs numerically. Ideally,
Externí odkaz:
http://arxiv.org/abs/2108.08587
Dual-energy X-ray tomography is considered in a context where the target under imaging consists of two distinct materials. The materials are assumed to be possibly intertwined in space, but at any given location there is only one material present. Fu
Externí odkaz:
http://arxiv.org/abs/2107.03535
The photographic dataset collected for the Helsinki Deblur Challenge 2021 (HDC2021) contains pairs of images taken by two identical cameras of the same target but with different conditions. One camera is always in focus and produces sharp and low-noi
Externí odkaz:
http://arxiv.org/abs/2105.10233
Publikováno v:
21st International Conference on Computational Science and Its Applications (ICCSA), 2021, pp. 146-156
The dual-tree complex wavelet transform (DT-$\mathbb{C}$WT) is extended to the 4D setting. Key properties of 4D DT-$\mathbb{C}$WT, such as directional sensitivity and shift-invariance, are discussed and illustrated in a tomographic application. The i
Externí odkaz:
http://arxiv.org/abs/2103.15674