Keyphrases
- training set
- sparse coding
- feature space
- natural images
- dictionary learning
- sparse representation
- unsupervised learning
- image classification
- linear combination
- image representation
- supervised learning
- discriminative power
- generative model
- image patches
- single image super resolution
- sparse codes
- higher order
- visual words
- high dimensional
- deep belief networks
- spatial information
- bag of words
- semi supervised