36 citations · 62 across the 3 of their papers we have counts for
4 papers
Shape recovery from sparse tomographic X-ray data
Heikki Haario, Aki Kallonen, Marko Laine +3
A two-dimensional tomographic problem is studied. The target is assumed to be a homogeneous object bounded by a smooth curve. A Non Uniform Rational Basis Splines (NURBS) curve is…
Tomographic X-ray data of a walnut
Keijo Hämäläinen, Lauri Harhanen, Aki Kallonen +3
This is the documentation of the tomographic X-ray data of a walnut made available at http://www.fips.fi/dataset.php . The data can be freely used for scientific purposes with appr…
Multi-resolution parameter choice method for total variation regularized tomography
Kati Niinimäki, Matti Lassas, Keijo Hämäläinen +4
A computational method is introduced for choosing the regularization parameter for total variation (TV) regularization. The approach is based on computing reconstructions at a few…
Density, porosity, mineralogy, and internal structure of cosmic dust and alteration of its properties during high velocity atmospheric entry
T. Kohout, A. Kallonen, J. -P. Suuronen +6
X-ray microtomography (XMT), X-ray diffraction (XRD) and magnetic hysteresis measurements were used to determine micrometeorite internal structure, mineralogy, crystallography, and…