Keyphrases
- sparse coding
- semi supervised
- unsupervised learning
- generative model
- subspace learning
- dictionary learning
- natural images
- sparse representation
- semi supervised learning
- linear combination
- image classification
- labeled data
- image representation
- supervised learning
- unlabeled data
- single image super resolution
- low rank
- manifold learning
- pairwise
- active learning
- visual words
- image patches
- sparse codes
- object category recognition
- metric learning
- high dimensional
- data sets
- model selection
- probabilistic model
- object recognition
- feature extraction
- face recognition