Google Patent On Detecting Duplicate And Near-Duplicate Files

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Google Patents: Detecting duplicate and near-duplicate files

Subjects > Computers (Search) > Internet (Search for Internet) > Search Engine News (Search)

United States Patent 6,658,423 Pugh , et al. December 2, 2003

Abstract

Improved duplicate and near-duplicate detection techniques may assign a number of fingerprints to a given document by (i) extracting parts from the document, (ii) assigning the extracted parts to one or more of a predetermined number of lists, and (iii) generating a fingerprint from each of the populated lists. Two documents may be considered to be near-duplicates if any one of their fingerprints match.

 Assignee:  Google, Inc. (Mountain View, CA)  
 Appl. No.:  768947 
 Filed:  January 24, 2001 

 Current U.S. Class: 707/102; 707/3  
 Intern'l Class:  G06F 017/30; G06F 007/00 
 Field of Search:  707/1,4,102,203,3,6,103  

See also:

• Google Patent On Detecting Duplicate Files - Claims
• Google Patent On Detecting Duplciate Files - Background Of The Invention & Summary
• Google Patent On Detecting Duplicate Files - Description
• Google Patent On Detecting Duplicate Files - Conclusions

I've finally gotten permission from Google to talk about this work, so I've put up [a web page with more information about this patent].

• [Bill Pugh]

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