Keyphrases
- sparse coding
- natural images
- dictionary learning
- sparse representation
- image classification
- linear combination
- unsupervised learning
- generative model
- group sparsity
- person re identification
- discriminative power
- image representation
- image patches
- sparse codes
- object category recognition
- single image super resolution
- feature space
- visual words
- reinforcement learning
- multiscale
- dimensionality reduction
- data sets