Keyphrases
- sparse coding
- natural images
- dictionary learning
- sparse representation
- linear combination
- image classification
- objective function
- discriminative power
- image representation
- unsupervised learning
- generative model
- sparse codes
- person re identification
- single image super resolution
- feature space
- visual words
- image patches
- object category recognition
- group sparsity
- high dimensional
- bag of words
- pattern recognition
- image processing
- sparsity constraints
- feature vectors
- active learning
- co occurrence