Keyphrases
- sparse coding
- dictionary learning
- natural images
- sparse representation
- linear combination
- image representation
- image classification
- unsupervised learning
- generative model
- discriminative power
- person re identification
- group sparsity
- feature space
- sparse codes
- image patches
- single image super resolution
- object category recognition
- visual words
- high dimensional
- pattern recognition
- spatial pyramid matching
- bag of words
- low resolution
- higher order
- small number
- image features
- sparsity constraints
- data analysis
- neural network