Sparse representation based on vector extension of reduced quaternion matrix for multiscale image denoising.
Shan GaiLong WangGuowei YangPeng YangPublished in: IET Image Process. (2016)
Keyphrases
- image denoising
- multiscale
- natural images
- wavelet coefficients
- wavelet domain
- denoising
- image processing
- partial differential equations
- contourlet transform
- total variation
- noisy images
- wavelet transform
- sparse coding
- scale space
- wavelet domain hidden markov tree
- fourier transform
- directional filter banks
- nonlocal means
- image segmentation
- bilateral filtering
- translation invariant
- image representation
- additive gaussian noise
- denoising algorithm
- edge detection
- anisotropic diffusion
- denoising methods
- total variation regularization
- image fusion
- undecimated wavelet transform
- image deblurring
- feature vectors
- higher order
- augmented lagrangian
- feature selection
- signal processing
- sparse representation