Shift-invariant approximations of structured shift-variant blurring matrices.
Claudio EstaticoFabio Di BenedettoPublished in: Numer. Algorithms (2013)
Keyphrases
- shift variant
- shift invariant
- wavelet domain
- discrete wavelet transform
- rotation invariant
- wavelet coefficients
- image restoration
- sparse coding
- inverse problems
- blurred images
- wavelet transform
- computationally demanding
- multiresolution
- multiscale
- edge preserving
- feature vectors
- spatial domain
- point spread function
- piecewise constant
- subband
- natural images
- high frequency