Keyphrases
- additional features
- automatically extracted
- feature vectors
- structural information
- feature space
- feature extraction
- structural features
- false positives
- co occurrence
- free text
- feature set
- image features
- content features
- digital libraries
- syntactic features
- database
- automatic text classification
- video clips
- text documents
- spatial information
- classification accuracy
- low level
- neural network
- data sets