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UID:204@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20140404T140000
DTEND;TZID=Europe/Paris:20140404T150000
DTSTAMP:20140320T130000Z
URL:https://www.i2m.univ-amu.fr/evenements/color-tomography/
SUMMARY: (...): Color tomography
DESCRIPTION:: In classical X-ray tomography\, a set of measurement is obtai
 ned by illuminating a 3D object with an ideally monochromatic X-ray source
 . After reconstruction one obtains a map of the absorption of the object f
 or the energy corresponding to the monochromatic source. In color X-ray to
 mography\, one acquires instead a set of measurement by modifying the spec
 trum of a polychromatic source with different filters. As a result\, one i
 s able to reconstruct several absorption maps (one for each filter) that c
 ontain different spectral information. The question at stake is whether on
 e can combine these information to obtain directly absorption maps of spec
 tral components of the object. I will show how the model leads to a non-li
 near inverse problem\, and propose a solution relying on sparsity.http://t
 est.i2m.univ-amu.fr/spip.php?page=pageperso
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