Keyphrases
- image classification
- spatial pyramid
- bag of features
- image representation
- bag of words
- visual words
- visual features
- object classification
- scene recognition
- feature extraction
- object class
- image features
- class specific
- scene classification
- object retrieval
- matching scheme
- keypoints
- similarity measure
- visual vocabulary
- probability estimates
- sift descriptors
- object detection
- sparse coding
- feature selection
- image retrieval
- sparse representation
- action recognition