Keyphrases
- sparse coding
- dictionary learning
- sparse representation
- natural images
- linear combination
- image classification
- single image super resolution
- unsupervised learning
- discriminative power
- image representation
- group sparsity
- affine transformation
- generative model
- person re identification
- visual words
- high dimensional
- affine invariant
- sparse codes
- object category recognition
- feature space
- higher order
- text classification
- image features
- face recognition
- computer vision