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SUMMARY:Bregmanized (Higher Order) Total Variation and its Application in 
 PET - Jahn Müller (University of Münster)
DTSTART:20120703T144000Z
DTEND:20120703T152000Z
UID:TALK38675@talks.cam.ac.uk
CONTACT:Carola-Bibiane Schoenlieb
DESCRIPTION:One of the standard techniques in image denoising - the ROF-mo
 del - is well known for recovering sharp edges of a signal or image\, but 
 also for producing staircase-like artifacts and suffering from a loss of c
 ontrast. In order to overcome these model-dependent deficiencies\, total v
 ariation (TV) modifications that incorporate higher-order derivatives have
  been proposed. These approaches reduce staircasing for reasonable paramet
 er choices. However\, the loss of contrast remains but can be eliminated i
 n all models by using Bregman iterations.\nIn the second part of the talk 
 the presented methods are applied to image reconstruction in Positron Emis
 sion Tomography (PET).
LOCATION:MR 14\, Centre for Mathematical Sciences
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