Algebraic multigrid preconditioning of the Hessian in optimization constrained by a partial differential equation.
Andrew T. BarkerAndrei DraganescuPublished in: Numer. Linear Algebra Appl. (2021)
Keyphrases
- partial differential equations
- inverse problems
- anisotropic diffusion
- image denoising
- numerical solution
- level set
- edge preserving
- difference equations
- image processing
- optimization problems
- multiscale
- image enhancement
- fourth order
- numerical methods
- curve evolution
- iterative methods
- global optimization
- ordinary differential equations
- energy functional
- problems in image processing
- differential equations
- numerical algorithms
- numerical scheme
- finite difference method
- diffusion equation
- nonlinear diffusion
- constrained optimization
- optimization methods
- high order
- active contours
- higher order
- pattern recognition
- boundary value problem
- natural images
- denoising