Keyphrases
- image database
- face images
- information retrieval
- document retrieval
- efficient retrieval
- image retrieval
- multimedia databases
- information retrieval systems
- facial images
- human faces
- databases
- similarity matching
- text retrieval
- retrieval model
- query expansion
- facial expressions
- relevance feedback
- database
- retrieval systems
- test collection
- linear programming
- indexing techniques
- average precision
- retrieval strategies