On sparse representations of linear operators and the approximation of matrix products.
Mohamed-Ali BelabbasPatrick J. WolfePublished in: CISS (2008)
Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- reconstruction error
- joint optimization
- compressive sensing
- face recognition
- image classification
- image patches
- random projections
- sparse reconstruction
- negative matrix factorization
- orthogonal matching pursuit
- image representation
- dimensionality reduction
- high dimensional data
- singular value decomposition
- compressed sensing
- regularized least squares
- sparse approximation
- signal processing
- multiscale
- pattern recognition
- decision trees
- manifold learning
- data sets
- natural images
- image data
- high dimensional
- neural network