Keyphrases
- sparse coding
- natural images
- sparse representation
- dictionary learning
- image classification
- linear combination
- unsupervised learning
- least squares
- discriminative power
- single image super resolution
- person re identification
- image representation
- generative model
- image patches
- group sparsity
- feature space
- object category recognition
- sparse codes
- visual words
- high dimensional
- sparsity constraints
- data sets
- object recognition
- input image
- computer vision