Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- compressed sensing
- hyperspectral image compression
- reconstruction error
- image classification
- image representation
- image patches
- dimensionality reduction
- random projections
- joint optimization
- face recognition
- high dimensional data
- compressive sensing
- regularized least squares
- orthogonal matching pursuit
- image retrieval
- test images
- pattern recognition