Comparison of preconditioning techniques for solving linear systems arising from the fourth order approximation of the three-dimensional elliptic equation.
Mehdi DehghanSeyedeh Mahboubeh Molavi-ArabshahiPublished in: Appl. Math. Comput. (2007)
Keyphrases
- linear systems
- fourth order
- sparse linear systems
- partial differential equations
- noise removal
- difference equations
- sufficient conditions
- numerical solution
- dynamical systems
- high order
- anisotropic diffusion
- image interpolation
- image processing
- image denoising
- coefficient matrix
- differential equations
- numerical methods
- image enhancement
- nonlinear diffusion
- estimation error
- mathematical model
- interior point methods
- level set
- noise reduction
- primal dual
- frequency domain
- wavelet transform