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Table 2 Mean click-count

From: A generic framework for ontology-based information retrieval and image retrieval in web data

  Image retrieval Document retrieval
With optimization Without optimization With optimization Without optimization
Query Mean (clicks) 2.37 3.83 2.73 5.44
Simple queries mean (clicks) 2.27 3.71 2.65 5.28
Complex queries mean (clicks) 2.43 3.91 2.79 5.5