BIT Numerical Mathematics

, Volume 47, Issue 2, pp 277–296 | Cite as

An accelerated algebraic multigrid algorithm for total-variation denoising



The variational partial differential equation (PDE) approach for image denoising restoration leads to PDEs with nonlinear and highly non-smooth coefficients. Such PDEs present convergence difficulties for standard multigrid methods. Recent work on algebraic multigrid methods (AMGs) has shown that robustness can be achieved in general but AMGs are well known to be expensive to apply. This paper proposes an accelerated algebraic multigrid algorithm that offers fast speed as well as robustness for image PDEs. Experiments are shown to demonstrate the improvements obtained.


Multigrid Method Image Denoising Interpolation Operator Setup Phase Point Step 
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© Springer Science + Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Mathematical SciencesThe University of LiverpoolLiverpoolUK

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