A phase velocity preserving fourth-order finite difference scheme for the Helmholtz equation with variable wavenumber.
Tingting WuWenhui ZhangTaishan ZengPublished in: Appl. Math. Lett. (2024)
Keyphrases
- finite difference
- fourth order
- partial differential equations
- numerical solution
- hamilton jacobi
- anisotropic diffusion
- diffusion equation
- image denoising
- noise removal
- level set
- image processing
- high order
- image enhancement
- finite element
- energy functional
- differential equations
- numerical methods
- curve evolution
- optical flow
- numerical analysis
- multiscale
- nonlinear diffusion
- image interpolation
- feature extraction
- image segmentation
- filtering method
- denoising