Image Denoising via Sparse Representation Over Grouped Dictionaries With Adaptive Atom Size.
Lina JiaShengtao SongLinhong YaoHantao LiQuan ZhangYunjiao BaiZhiguo GuiPublished in: IEEE Access (2017)
Keyphrases
- sparse representation
- image denoising
- denoising
- noisy images
- dictionary learning
- natural images
- sparse coding
- total variation
- image classification
- image patches
- denoising algorithm
- sparse and redundant representations
- image processing
- face recognition
- random projections
- image representation
- compressive sensing
- signal processing
- wavelet coefficients
- wavelet domain
- sparse approximations
- high dimensional data
- test images
- denoising methods
- dimensionality reduction
- piecewise smooth
- nearest neighbor
- multiscale
- gaussian noise
- similarity measure
- norm minimization
- computational complexity
- image prior
- sparse codes