Matrix-free multigrid block-preconditioners for higher order Discontinuous Galerkin discretisations.
Peter BastianEike Hermann MüllerSteffen MüthingMarian PiatkowskiPublished in: CoRR (2018)
Keyphrases
- higher order
- partial differential equations
- coefficient matrix
- linear systems
- block wise
- high order
- natural images
- multiresolution
- lower order
- row column
- multiscale
- edge preserving
- image analysis
- image restoration
- differential equations
- anisotropic diffusion
- pairwise
- singular value decomposition
- rows and columns
- iterative methods
- dct coefficients
- low rank
- linear algebra
- optical flow computation
- boundary conditions
- level set
- markov random field
- image processing
- numerical methods
- image blocks
- block size
- neural network
- computationally expensive