Keyphrases
- sparse coding
- natural images
- dictionary learning
- sparse representation
- image classification
- linear combination
- unsupervised learning
- discriminative power
- group sparsity
- generative model
- image representation
- single image super resolution
- person re identification
- feature space
- image patches
- sparse codes
- visual words
- feature extraction
- object category recognition
- spatial information
- sparsity constraints
- high dimensional
- reinforcement learning