A novel dictionary learning method for sparse representation with nonconvex regularizations.
Benying TanYujie LiHaoli ZhaoXiang LiShuxue DingPublished in: Neurocomputing (2020)
Keyphrases
- sparse representation
- dictionary learning
- group sparsity
- sparse coding
- image super resolution
- reconstruction error
- test images
- single image super resolution
- negative matrix factorization
- image classification
- unsupervised learning
- face recognition
- structured sparsity
- signal processing
- pairwise
- missing data
- model selection
- natural images
- dimensionality reduction
- higher order
- compressive sensing
- small number
- sparsity constraints
- similarity measure
- sparse codes
- decision trees