Content-based information retrieval
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United States of America Patent
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Jan 1, 2013
Grant Date -
Oct 7, 2010
app pub date -
Apr 2, 2009
filing date -
Apr 2, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Content-based information retrieval is described. In an example, a query item such as an image, document, email or other item is presented and items with similar content are retrieved from a database of items. In an example, each time a query is presented, a classifier is formed based on that query and using a training set of items. For example, the classifier is formed in real-time and is formed in such a way that a limit on the proportion of the items in the database that will be retrieved is set. In an embodiment, the query item is analyzed to identify tokens in that item and subsets of those tokens are selected to form the classifier. For example, the subsets of tokens are combined using Boolean operators in a manner which is efficient for searching on particular types of database.
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