WO2008019133A3 - Detecting duplicate and near-duplicate files - Google Patents

Detecting duplicate and near-duplicate files Download PDF

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Publication number
WO2008019133A3
WO2008019133A3 PCT/US2007/017487 US2007017487W WO2008019133A3 WO 2008019133 A3 WO2008019133 A3 WO 2008019133A3 US 2007017487 W US2007017487 W US 2007017487W WO 2008019133 A3 WO2008019133 A3 WO 2008019133A3
Authority
WO
WIPO (PCT)
Prior art keywords
technique
documents
duplicate
determine whether
duplicates
Prior art date
Application number
PCT/US2007/017487
Other languages
French (fr)
Other versions
WO2008019133A2 (en
WO2008019133A9 (en
Inventor
Monika H Henzinger
Original Assignee
Google Inc
Monika H Henzinger
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Google Inc, Monika H Henzinger filed Critical Google Inc
Priority to CN2007800366340A priority Critical patent/CN101523343B/en
Priority to EP20070836544 priority patent/EP2054797A4/en
Priority to CA2660202A priority patent/CA2660202C/en
Publication of WO2008019133A2 publication Critical patent/WO2008019133A2/en
Publication of WO2008019133A3 publication Critical patent/WO2008019133A3/en
Publication of WO2008019133A9 publication Critical patent/WO2008019133A9/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/194—Calculation of difference between files
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/958—Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking

Abstract

Near duplicate documents may be identified by processing an accepted set of documents to determine a first set of near duplicate documents using a first technique, and processing the first set to determine a second set of near duplicate documents using a second technique. The first technique might be token order dependent, and the second technique might be order independent. The first technique might be token frequency independent, and the second technique might be frequency dependent. The first technique might determine whether two documents are near duplicates using representations based on a subset of the words or tokens of the documents, and the second technique might determine whether two documents are near duplicates using representations based on all of the words or tokens of the documents. The first technique might use set intersection to determine whether or not documents are near duplicates, and the second technique might use random projections to determine whether or not documents are near duplicates.
PCT/US2007/017487 2006-08-04 2007-08-03 Detecting duplicate and near-duplicate files WO2008019133A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2007800366340A CN101523343B (en) 2006-08-04 2007-08-03 Detecting duplicate and near-duplicate files
EP20070836544 EP2054797A4 (en) 2006-08-04 2007-08-03 Detecting duplicate and near-duplicate files
CA2660202A CA2660202C (en) 2006-08-04 2007-08-03 Detecting duplicate and near-duplicate files

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/499,260 US8015162B2 (en) 2006-08-04 2006-08-04 Detecting duplicate and near-duplicate files
US11/499,260 2006-08-04

Publications (3)

Publication Number Publication Date
WO2008019133A2 WO2008019133A2 (en) 2008-02-14
WO2008019133A3 true WO2008019133A3 (en) 2008-11-20
WO2008019133A9 WO2008019133A9 (en) 2009-04-30

Family

ID=39033519

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/017487 WO2008019133A2 (en) 2006-08-04 2007-08-03 Detecting duplicate and near-duplicate files

Country Status (5)

Country Link
US (2) US8015162B2 (en)
EP (1) EP2054797A4 (en)
CN (2) CN102982053B (en)
CA (1) CA2660202C (en)
WO (1) WO2008019133A2 (en)

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* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
CA2660202C (en) 2013-03-12
CA2660202A1 (en) 2008-02-14
CN101523343A (en) 2009-09-02
WO2008019133A2 (en) 2008-02-14
US20120290597A1 (en) 2012-11-15
US20080044016A1 (en) 2008-02-21
CN101523343B (en) 2012-07-04
WO2008019133A9 (en) 2009-04-30
US8015162B2 (en) 2011-09-06
CN102982053A (en) 2013-03-20
EP2054797A4 (en) 2013-09-04
CN102982053B (en) 2016-08-10
EP2054797A2 (en) 2009-05-06

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