Keyphrases
- sparse coding
- dictionary learning
- natural images
- sparse representation
- image classification
- linear combination
- generative model
- image representation
- discriminative power
- group sparsity
- unsupervised learning
- single image super resolution
- object category recognition
- feature space
- high dimensional
- sparse codes
- person re identification
- object recognition
- data sets
- image patches
- visual words
- similarity measure
- sparsity constraints
- feature selection
- active learning
- semi supervised
- co occurrence
- decision trees
- dimensionality reduction
- maximum likelihood