Keyphrases
- sparse representation
- learning rate
- global constraints
- sparsity constraints
- joint optimization
- dictionary learning
- sparse coding
- constraint programming
- convergence rate
- intrinsic image decomposition
- image classification
- learning algorithm
- face recognition
- image representation
- convergence speed
- signal processing
- image patches
- negative matrix factorization
- constraint satisfaction problems
- dimensionality reduction
- regularized least squares
- high dimensional data
- pattern recognition
- data sets
- principal component analysis
- computational complexity
- arc consistency
- multiscale
- feature extraction