Keyphrases
- information retrieval systems
- information retrieval
- document collections
- document images
- hierarchical structure
- database
- structured documents
- web browser
- document processing
- web documents
- user queries
- document set
- coarse to fine
- document clustering
- document retrieval
- web pages
- hierarchically organized
- topic hierarchy
- multimedia documents
- text documents
- document analysis
- digital documents
- retrieval systems
- web applications
- multiscale
- multimedia
- search engine
- neural network