Keyphrases
- sparse coding
- dictionary learning
- sparse representation
- image classification
- natural images
- linear combination
- spatial pyramid matching
- unsupervised learning
- generative model
- image patches
- image representation
- discriminative power
- image features
- sparse codes
- video sequences
- feature space
- feature vectors
- video data
- high dimensional
- single image super resolution
- object detection
- object category recognition
- high dimensional data
- visual features
- bag of words
- visual words
- low dimensional
- high quality