Keyphrases
- vector space
- text retrieval
- retrieval model
- retrieval systems
- document collections
- document representation
- keyword extraction
- term frequency
- retrieval quality
- document retrieval
- information retrieval
- latent semantic indexing
- query terms
- retrieval effectiveness
- retrieval strategies
- information retrieval systems
- inverted file
- term weighting
- feature vectors
- text representation
- query expansion
- automatic query expansion
- cross language
- document images
- document clustering
- test collection
- multimedia
- relevant documents
- retrieved documents
- user queries
- document analysis
- image retrieval
- digital libraries
- handwritten documents
- keywords
- learning algorithm