Digital image restoration by multigrid methods

Numerical solution of partial differential equations by multigrid methods for removing noise from digital pictures. Four different methods for the restoration of an image corrupted by white Gaussian noise are considered: method based on diffusion equation, Perona-Malik method, regularized Perona- Malik method and Rudin-Osher method. All problems are solved by multigrd methods. Algorithm that can stop the diffusion process is suggested.