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