Keyphrases
- sparse coding
- dictionary learning
- sparse representation
- natural images
- image classification
- discriminative power
- linear combination
- unsupervised learning
- image representation
- group sparsity
- single image super resolution
- generative model
- image patches
- person re identification
- sparse codes
- feature space
- object category recognition
- visual words
- input image
- deep belief networks
- spatial pyramid matching
- action recognition
- data sets
- co occurrence
- ground truth
- object recognition
- multiscale