Keyphrases
- pairwise constraints
- semi supervised
- face recognition
- face databases
- locality preserving projections
- semi supervised clustering
- manifold learning
- subspace methods
- labeled data
- pairwise
- face images
- semi supervised learning
- unlabeled data
- semi supervised classification
- active learning
- principal component analysis
- supervised learning
- unsupervised learning
- subspace learning
- label propagation
- feature extraction
- constrained clustering
- document clustering
- loss function
- computer vision
- spectral clustering
- metric learning
- linear discriminant analysis
- unsupervised clustering
- background knowledge
- sparse representation
- data representation
- decision boundary
- distance metric
- facial expressions