Keyphrases
- fourth order
- upper bound
- high order
- smooth regions
- lower bound
- noise removal
- least squares
- higher order
- image interpolation
- partial differential equations
- symmetric matrices
- symmetric matrix
- tensor factorization
- linear programming
- worst case
- objective function
- anisotropic diffusion
- estimation error
- sample size
- nonlinear diffusion
- markov random field
- covariance matrix
- convergence rate
- image enhancement
- natural images