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Cosine transform based preconditioners for total variation deblurring
60
Zitationen
3
Autoren
1999
Jahr
Abstract
In PDE image restoration problems, one has to invert operators which is a sum of a blurring operator and an elliptic operator with highly varying coefficient. We present a preconditioner for such operators, which can be used with the conjugate gradient (CG) method, and compare it with Vogel and Oman's product preconditioner.
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