Preconditioning Techniques for Diagonal-times-Toeplitz Matrices in Fractional Diffusion Equations.
Jianyu PanRihuan KeMichael K. NgHai-Wei SunPublished in: SIAM J. Sci. Comput. (2014)
Keyphrases
- diffusion equation
- anisotropic diffusion
- systems of linear equations
- edge preserving
- scale space
- diffusion process
- partial differential equations
- pattern formation
- image enhancement
- noise removal
- least squares
- boundary conditions
- symmetric positive definite
- covariance matrix
- finite difference
- nonlinear diffusion
- filtering method
- multiscale
- edge detection
- covariance matrices
- image sequences
- coherence enhancing diffusion
- single image
- sufficient conditions
- feature extraction