Nonnegative Dictionary Learning by Nonnegative Matrix Factorization with a Sparsity Constraint.
Zunyi TangShuxue DingPublished in: ISNN (2) (2012)
Keyphrases
- nonnegative matrix factorization
- sparsity constraints
- dictionary learning
- negative matrix factorization
- sparse representation
- sparse coding
- matrix factorization
- least squares
- principal component analysis
- data representation
- objective function
- spectral clustering
- original data
- document clustering
- signal processing
- image patches
- clustering method
- image classification
- prior knowledge
- pairwise
- data mining