Laplacian Preconditioning of Elliptic PDEs: Localization of the Eigenvalues of the Discretized Operator.
Tomás GergelitsKent-André MardalBjørn Fredrik NielsenZdenek StrakosPublished in: SIAM J. Numer. Anal. (2019)
Keyphrases
- partial differential equations
- differential operators
- inverse problems
- anisotropic diffusion
- edge preserving
- laplacian operator
- image denoising
- numerical solution
- level set
- image processing
- numerical methods
- boundary value problem
- fourth order
- image enhancement
- multiscale
- high order
- graph laplacian
- laplace beltrami
- laplacian matrix
- differential equations
- singular value decomposition
- diffusion equation
- edge detection
- correlation matrix
- principal components
- covariance matrix
- linear programming
- denoising
- vector field
- natural images
- iterative methods