Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- face recognition
- image patches
- medical images
- deformable models
- image classification
- sparse approximations
- reconstruction error
- object tracking
- image representation
- joint optimization
- piecewise smooth
- random projections
- negative matrix factorization
- compressive sensing
- compressed sensing
- test images
- dimensionality reduction
- high dimensional data
- regularized least squares
- machine learning
- object recognition
- sparse reconstruction
- sparse codes
- data sets
- decision trees
- basis vectors