Keyphrases
- sparse representation
- dictionary learning
- sparse coding
- object tracking
- face recognition
- image classification
- compressive sensing
- image representation
- compressed sensing
- reconstruction error
- image patches
- sparse approximations
- sparse reconstruction
- regularized least squares
- random projections
- signal processing
- high dimensional data
- dimensionality reduction
- joint optimization
- test images
- piecewise smooth
- negative matrix factorization
- semi supervised
- sparsity constraints
- principal component analysis
- nearest neighbor
- feature space
- multiscale
- sparse coefficients
- feature extraction