Information Retrieval (continued)

• How are documents retrieved for a query?
  • The "vector space" model
  • Term Frequency/Inverse Document Frequency (TF/IDF)
• How are IR systems evaluated?
  • Ranking the results
  • Precision and recall
• An application involving image retrieval: sentences vs. word and phrase lists (Flank 2000)
  • Structure and processing of queries
  • Processing of documents and presentation of results
  • Measuring performance

(2)

(return to previous IR slides)

(return to syllabus)