Keyphrases
- sparse coding
- dictionary learning
- sparse representation
- natural images
- image classification
- linear combination
- unsupervised learning
- discriminative power
- image representation
- group sparsity
- person re identification
- generative model
- visual words
- image patches
- single image super resolution
- sparse codes
- object category recognition
- sparsity constraints
- data sets
- alternating optimization
- higher order
- feature space
- pattern recognition
- multiscale
- high quality
- image processing