Keyphrases
- retrieval systems
- information retrieval systems
- test collection
- text retrieval
- information retrieval
- digital images
- watermarking scheme
- video retrieval
- watermarking algorithm
- search engine
- average precision
- retrieval model
- multimedia
- retrieved documents
- user studies
- relevance judgments
- evaluation measures
- query reformulation
- ranked list
- sentence retrieval
- retrieval process
- learning to rank
- term weighting
- multimedia retrieval
- aggregated search
- text retrieval systems
- text classification
- feature selection
- xml retrieval
- evaluation of information retrieval systems