Keyphrases
- nonnegative matrix factorization
- probabilistic latent semantic indexing
- negative matrix factorization
- matrix factorization
- data representation
- active set
- nonnegative matrix
- least squares
- spectral clustering
- principal component analysis
- sparsity constraints
- document clustering
- original data
- objective function
- clustering algorithm
- optical flow
- feature vectors
- multiscale