Keyphrases
- sparse representation
- machine learning
- dictionary learning
- sparse coding
- signal processing
- image classification
- pattern recognition
- face recognition
- reconstruction error
- random projections
- negative matrix factorization
- image patches
- compressive sensing
- dimensionality reduction
- sparse reconstruction
- high dimensional data
- compressed sensing
- piecewise smooth
- transfer learning
- image representation
- decision trees
- support vector machine
- joint optimization
- regularized least squares
- data mining
- test images
- active learning
- feature selection
- sparse codes
- computer vision
- data analysis
- feature extraction
- sparse coefficients
- norm minimization
- learning tasks
- unsupervised learning
- generative model
- model selection
- natural images
- nearest neighbor
- probabilistic model
- high dimensional
- image processing