Keyphrases
- sparse coding
- dictionary learning
- sparse representation
- natural images
- linear combination
- image classification
- unsupervised learning
- sparse codes
- generative model
- image representation
- discriminative power
- object category recognition
- single image super resolution
- group sparsity
- feature space
- person re identification
- visual words
- image patches
- high dimensional
- probabilistic model
- signal processing
- dimensionality reduction
- bag of words
- image processing
- computer vision
- data sets