Keyphrases
- text retrieval
- information retrieval
- document collections
- document retrieval
- cross language
- multimedia
- image retrieval
- query expansion
- retrieval systems
- multimedia retrieval
- keyword extraction
- multimedia information retrieval
- inverted file
- retrieval model
- latent semantic indexing
- visual information
- databases
- database systems
- information extraction
- retrieval quality
- learning algorithm
- textual information retrieval