An accelerated algebraic multigrid algorithm for total-variation denoising |
| |
Authors: | Ke Chen Joseph Savage |
| |
Institution: | (1) Department of Mathematical Sciences, The University of Liverpool, Peach Street, Liverpool, L69 7ZL, UK |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|