CA2260094A1 - A method for inserting and detecting electronic watermark data into a digital image and a device for the same - Google Patents

A method for inserting and detecting electronic watermark data into a digital image and a device for the same Download PDF

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Publication number
CA2260094A1
CA2260094A1 CA002260094A CA2260094A CA2260094A1 CA 2260094 A1 CA2260094 A1 CA 2260094A1 CA 002260094 A CA002260094 A CA 002260094A CA 2260094 A CA2260094 A CA 2260094A CA 2260094 A1 CA2260094 A1 CA 2260094A1
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CA
Canada
Prior art keywords
watermark data
electronic watermark
same
digital image
detecting electronic
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002260094A
Other languages
French (fr)
Other versions
CA2260094C (en
Inventor
Yutaka Wakasu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Personal Computers Ltd
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to CA002260094A priority Critical patent/CA2260094C/en
Priority to US09/234,764 priority patent/US6259801B1/en
Priority to AU13179/99A priority patent/AU758814B2/en
Priority to CN99100376A priority patent/CN1113355C/en
Priority to KR1019990002534A priority patent/KR100328808B1/en
Publication of CA2260094A1 publication Critical patent/CA2260094A1/en
Application granted granted Critical
Publication of CA2260094C publication Critical patent/CA2260094C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
    • G06T1/0071—Robust watermarking, e.g. average attack or collusion attack resistant using multiple or alternating watermarks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G06T1/0021—Image watermarking
    • G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0052—Embedding of the watermark in the frequency domain
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0065—Extraction of an embedded watermark; Reliable detection

Abstract

An image is divided into blocks, and different electronic watermark data are embedded into every block using a DCT transformer (103), electronic watermark data inserter (104), and IDCT transformer (107). At that time, reference is made to an electronic watermark data insertion position table (105) and electronic watermark data table (106) which specify that which electronic watermark data is to be inserted into which block of the image.
CA002260094A 1999-01-19 1999-01-19 A method for inserting and detecting electronic watermark data into a digital image and a device for the same Expired - Fee Related CA2260094C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002260094A CA2260094C (en) 1999-01-19 1999-01-19 A method for inserting and detecting electronic watermark data into a digital image and a device for the same
US09/234,764 US6259801B1 (en) 1999-01-19 1999-01-21 Method for inserting and detecting electronic watermark data into a digital image and a device for the same
AU13179/99A AU758814B2 (en) 1999-01-19 1999-01-21 A method for inserting and detecting electronic watermark data into a digital image and a device for the same
CN99100376A CN1113355C (en) 1999-01-19 1999-01-26 Method and device for inserting electronic watermark into digital image and testing electronic watermark
KR1019990002534A KR100328808B1 (en) 1999-01-19 1999-01-27 A method for inserting and detecting electronic watermark data into a digital image and a device for the same

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CA002260094A CA2260094C (en) 1999-01-19 1999-01-19 A method for inserting and detecting electronic watermark data into a digital image and a device for the same
US09/234,764 US6259801B1 (en) 1999-01-19 1999-01-21 Method for inserting and detecting electronic watermark data into a digital image and a device for the same
AU13179/99A AU758814B2 (en) 1999-01-19 1999-01-21 A method for inserting and detecting electronic watermark data into a digital image and a device for the same
CN99100376A CN1113355C (en) 1999-01-19 1999-01-26 Method and device for inserting electronic watermark into digital image and testing electronic watermark
KR1019990002534A KR100328808B1 (en) 1999-01-19 1999-01-27 A method for inserting and detecting electronic watermark data into a digital image and a device for the same

Publications (2)

Publication Number Publication Date
CA2260094A1 true CA2260094A1 (en) 2000-07-19
CA2260094C CA2260094C (en) 2002-10-01

Family

ID=33033293

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002260094A Expired - Fee Related CA2260094C (en) 1999-01-19 1999-01-19 A method for inserting and detecting electronic watermark data into a digital image and a device for the same

Country Status (5)

Country Link
US (1) US6259801B1 (en)
KR (1) KR100328808B1 (en)
CN (1) CN1113355C (en)
AU (1) AU758814B2 (en)
CA (1) CA2260094C (en)

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Also Published As

Publication number Publication date
CA2260094C (en) 2002-10-01
US6259801B1 (en) 2001-07-10
KR20000051842A (en) 2000-08-16
KR100328808B1 (en) 2002-03-14
AU758814B2 (en) 2003-04-03
CN1262510A (en) 2000-08-09
CN1113355C (en) 2003-07-02
AU1317999A (en) 2000-07-27

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Effective date: 20180119