Keyphrases
- sparse representation
- sparse coefficients
- sparsity constraints
- norm minimization
- test images
- sparse coding
- dictionary learning
- sparse reconstruction
- learning algorithm
- image super resolution
- sparse representation based classification
- compressive sensing
- low rank matrix recovery
- sparse approximations
- orthogonal matching pursuit
- regularized least squares
- reconstruction error
- image patches
- face recognition
- piecewise smooth
- random projections
- low rank
- convex optimization