Keyphrases
- threshold selection
- group sparsity
- structured sparsity
- sparse coding
- dictionary learning
- low rank
- sparse representation
- discriminative power
- natural images
- statistical learning
- compressive sensing
- greedy algorithm
- matrix factorization
- machine learning
- missing data
- linear combination
- image classification
- learning problems
- singular value decomposition
- cross validation
- group lasso
- nearest neighbor
- learning algorithm