Improved block preconditioners for linear systems arising from half-quadratic image restoration.
Chaojie WangHongyi LiDi ZhaoPublished in: Appl. Math. Comput. (2019)
Keyphrases
- image restoration
- linear systems
- edge preserving
- half quadratic
- edge preserving regularization
- total variation
- coefficient matrix
- image deconvolution
- dynamical systems
- sufficient conditions
- image restoration problems
- image processing
- image deblurring
- markov random field
- super resolution
- image recovery
- shift variant
- blurred images
- regularization parameter
- gaussian noise
- denoising
- noise reduction
- total least squares
- regularization method
- edge preservation
- regularization term
- degraded images
- edge detection
- least squares
- mumford shah functional
- pid controller
- motion blur
- anisotropic diffusion