Direct high-order edge-preserving regularization for tomographic image reconstruction.
Daniil KazantsevEvgueni OvtchinnikovWilliam R. B. LionheartPhilip J. WithersPeter D. LeePublished in: CoRR (2015)
Keyphrases
- high order
- tomographic image reconstruction
- shift variant
- shift invariant
- image restoration
- inverse problems
- higher order
- edge preserving
- computationally demanding
- markov random field
- pairwise
- piecewise constant
- wavelet domain
- partial differential equations
- fourth order
- discrete wavelet transform
- rotation invariant
- computationally efficient
- iterative methods
- image segmentation
- human visual system
- denoising
- weighted least squares
- optimization problems
- natural images
- point spread function
- anisotropic diffusion
- convex optimization
- noise reduction