Hierarchical image representation via multi-level sparse coding.
Keyu LuJian LiXiangjing AnHangen HePublished in: ICIP (2014)
Keyphrases
- image representation
- sparse coding
- image classification
- dictionary learning
- multiscale
- sparse representation
- discriminative power
- bag of words
- visual words
- discriminative dictionary
- image features
- image retrieval
- sparse codes
- image content
- object recognition
- feature space
- pattern recognition
- bag of features
- scene recognition
- bag of visual words
- natural images
- compressive sensing
- machine learning
- spatial pyramid matching
- small number
- unsupervised learning