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WO2008066235A1 - Appareil et procédé d'insertion/extraction de filigrane non aveugle à l'aide de caractéristiques de données média numériques - Google Patents

Appareil et procédé d'insertion/extraction de filigrane non aveugle à l'aide de caractéristiques de données média numériques Download PDF

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Publication number
WO2008066235A1
WO2008066235A1 PCT/KR2007/003537 KR2007003537W WO2008066235A1 WO 2008066235 A1 WO2008066235 A1 WO 2008066235A1 KR 2007003537 W KR2007003537 W KR 2007003537W WO 2008066235 A1 WO2008066235 A1 WO 2008066235A1
Authority
WO
WIPO (PCT)
Prior art keywords
watermark
media data
related information
database
data
Prior art date
Application number
PCT/KR2007/003537
Other languages
English (en)
Inventor
Sang Kwang Lee
Young Ho Suh
Weon Geun Oh
Won Gyum Kim
Wonyoung Yoo
Sung Hwan Lee
Yong Seok Seo
Hye Won Jung
Seon Hwa Lee
Young Suk Yoon
Seungjae Lee
Jin Soo Seo
Original Assignee
Electronics And Telecommunications Research Institute
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
Priority claimed from KR1020070024095A external-priority patent/KR100834095B1/ko
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to US12/516,614 priority Critical patent/US20100063978A1/en
Publication of WO2008066235A1 publication Critical patent/WO2008066235A1/fr

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Classifications

    • 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
    • G06T1/0028—Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
    • 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
    • G06T2201/0081—Image watermarking whereby both original and watermarked images are required at decoder, e.g. destination-based, non-blind, non-oblivious

Definitions

  • the present invention relates to an apparatus and method for inserting/ extracting a watermark into/from digital media data, and more particularly, to an apparatus and method for inserting/extracting a nonblind watermark using the features (i.e., unique characteristics) of digital media data, which can automatically search original media data using information about the features of digital media data robust against modification due to watermarking and can conveniently retrieve a water using watermark- related information.
  • features i.e., unique characteristics
  • original media data can be used when a watermark is extracted.
  • original media data cannot be used when a watermark is extracted.
  • the nonblind watermarking method can insert a watermark strongly and unrecognizably.
  • security preservation must be always secured to prevent the original media data from being disclosed, and the search of the original media data takes a lot of time when a huge media database is used for watermark extraction. Accordingly, the efficiency of the watermark extraction degrades greatly.
  • a watermark is retrieved using the difference between original media data and watermarked media data at a watermark insertion position.
  • the presence of the watermark is determined using the correlation between an original watermark and the retrieved watermark.
  • watermark-related information such as a watermarking method, watermark data, a watermark insertion position, and watermark intensity that is determined according to the characteristics of media data.
  • an apparatus for inserting a nonblind watermark using features of digital media data including: a media database for storing one or more media data; an additional information database for storing watermark-related information corresponding to each of the media data stored in the media database; a watermark insertion module for, after host media data is determined from among the media data stored in the media database, searching the watermark-related information corresponding to the host media data from the additional information database, and inserting a watermark into the host media data according to the searched watermark-related information.
  • the watermark-related information includes a watermarking method, watermark data, a watermark insertion position, and watermark intensity.
  • the media data stored in the media database and the watermark-related information stored in the additional information database are linked to each other through index values.
  • an apparatus for extracting a nonblind watermark including: a feature extraction module for extracting features from watermarked media data; a feature search module for searching corresponding original media data and watermark-related information using the extracted features; a watermark extraction module for extracting a watermark from the watermarked media data using the original media data and the watermark-related informat ion searched for by the feature search module.
  • the features are the unique characteristics of media data robust against modification due to watermarking.
  • the feature search module searches features very similar to the extracted features from a feature database, and searches original media data and watermark-related information corresponding to the searched features.
  • a method for inserting a nonblind watermark including the steps of: determining host media data from among media data; searching watermark-related information corresponding to the determined host media data from an additional information database,; inserting a watermark into the determined host media data using a watermark insertion module according to the searched watermark-related information.
  • a method for extracting a nonblind watermark including the steps of: extracting, at a feature extraction module, features from watermarked media data; searching, at a feature search module, original media data and watermark-related information corresponding to the extracted features using the extracted features; extracting, at a watermark extraction module, a watermark from the watermarked media data using the original media data and watermark-related information searched by the feature search module.
  • a method for constructing a watermark system including the steps of: constructing a media database by storing one or more media data; constructing a feature database by extracting the features of each of the media data stored in the media database; storing, in an additional information database, watermark-related information including a watermarking method, watermark data, a watermark insertion position, and watermark intensity determined by analyzing each of the media data stored in the media database; linking the extracted features of the feature database corresponding to each of the media data of the media database, and the watermark-related information of the additional information database through index values.
  • the apparatus and method for inserting/extracting a nonblind watermark using the features (i.e., unique characteristics) of digital media data according to the present invention can efficiently extract a watermark by automatically searching, when the watermark is extracted, original media data using the features of media data and watermark-related information determined by the features of the media data.
  • the apparatus and method can adaptively insert a watermark into host media data using the watermark-related information.
  • FIG. 1 is a diagram illustrating the structure of a database of a watermark system according to the present invention
  • FIG. 2 is a block diagram of an apparatus for inserting a nonblind watermark according to the present invention
  • FIG. 3 is a block diagram of an apparatus for extracting a nonblind watermark according to the present invention
  • FIG. 4 is a flowchart illustrating a method for inserting a nonblind watermark according to the present invention.
  • FIG. 5 is a flowchart illustrating a method for extracting a nonblind watermark according to the present invention.
  • FIG. 1 is a diagram illustrating the structure of a database of a watermark system according to the present invention.
  • the database of the watermark system includes a media database
  • the media database 100 stores one or more media data that will be protected by copyright.
  • the media data may include one or more of image data, audio data, and video data.
  • the feature database 200 stores the features of each of the media data stored in the media database 100.
  • the features of the media data represent the unique characteristics of the media data that are used for media data identification.
  • image data or video data include visual characteristics such as color, texture, and motion.
  • Features such as dominant color, edge histogram, and motion trajectory may be used for the media data identification in the image data or video data.
  • Such features of the media data need to be robust against a certain level of intentional or unintentional attack as well as modification due to watermarking.
  • the features of the media data are extracted by a feature extraction module 400 from the media data and are stored in the feature database 200.
  • the additional information database 300 stores watermark-related information such as a watermarking method, watermark data, a watermark insertion position, and watermark intensity determined through characteristic analysis of each of the media data stored in the media database 100.
  • a characteristic analysis module 500 analyzes the characteristics of each of the media data, determines the watermark-related information for each of the media data, and stores the determined watermark-related information in the additional information database 300.
  • Each of the media data, the features, and the watermark-related information stored in the media database 100, the feature database 200, and the additional information database 300 respectively are linked to each other through index values.
  • FIG. 2 is a block diagram of an apparatus for inserting a nonblind watermark according to the present invention.
  • the apparatus includes a media database 100, an additional information database 300, and a watermark insertion module 210.
  • the media database 100 stores one or more media data.
  • the additional information database 300 stores watermark-related information according to the characteristics of each of the media data stored in the media database 100.
  • the watermark-related information includes a watermarking method, watermark data, a watermark insertion position, and watermark intensity.
  • the media data of the media database 100 and the watermark-related information of the additional information database 300 are linked to each other through index values. Each of the media data corresponds to different watermark-related information.
  • FIG. 3 is a block diagram of an apparatus for extracting a nonblind watermark according to the present invention.
  • the apparatus includes a feature extraction module 310, a feature search module 320, and a watermark extraction module 330.
  • the feature extraction module 310 extracts features from watermarked media data
  • the feature search module 320 searches original media data using the features extracted by the feature extraction module 310. Information stored in a feature database 200 and media database 100 is used to search the original media data. [51] The feature search module 320 searches features equal to or very similar to the extracted features from the feature database 200. The original media data tcor- responding to the watermarked media data 500 are searched from the media database
  • each of the features searched from the feature database 200 has a different index value. Accordingly, the original media data having the same or corresponding index value are searched from the media database 100.
  • the feature search module 320 searches, from the additional information database 300, watermark-related information 5 corresponding to an index value 3 of the searched features.
  • the watermark extraction module 330 compares the watermarked media data 500 with the original media data 4. Also, the watermark extraction module 330 determines whether the watermark is inserted using the watermark-related information 5, and extracts the watermark simultaneously. [55] FIG.
  • FIG. 4 is a flowchart illustrating a method for inserting a nonblind watermark according to the present invention.
  • the method includes the step S410 of determining host media data, the step S420 of searching watermark-related information, and the step S430 of inserting a watermark.
  • the host media data is determined from among media data stored in a media database 100 in order that the watermark is inserted by user.
  • the watermark-related information linked to the host media data through an index value is searched from the additional information database 300.
  • the watermark insertion module 210 inserts the watermark into the host media data using the watermark-related information.
  • FIG. 5 is a flowchart illustrating a method for extracting a nonblind watermark according to the present invention.
  • the method includes the step S510 of extracting features, the step
  • the feature extraction module 310 extracts the features from watermarked media data 500.
  • a feature search module 320 searches the index value from a feature database 200 using the features extracted by the feature extraction module 310.
  • Each of features stored in the feature database 200 has a different index value, and is linked to different original media data 4 of a media database 100 and watermark-related information 5 of an additional information 320 through different index values.
  • step S530 original media data 4 linked to the extracted features through the searched index value is searched from the media database 100.
  • step S540 the watermark-related information 5 linked to the extracted features through the searched index value is searched from an additional information database 300.
  • step S550 it is determined if the watermark is inserted in the watermarked media data 500 using the searched original media data 4 and watermark-related information 5, and if so, the watermark is extracted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Image Processing (AREA)

Abstract

Appareil et procédé d'insertion/extraction d'un filigrane non aveugle à l'aide de caractéristiques de données média numériques. L'appareil et le procédé insèrent un filigrane de manière adaptée à l'aide d'informations liées au filigrane déterminées par l'analyse des caractéristiques de données média numériques, et extrait les caractéristiques des données média numériques, recherche automatiquement des données média d'origine correspondant aux caractéristiques, et extrait simultanément et efficacement un filigrane à l'aide d'informations liées au filigrane. Ainsi, une fois le filigrane extrait, les données média d'origine peuvent être automatiquement recherchées.
PCT/KR2007/003537 2006-12-02 2007-07-23 Appareil et procédé d'insertion/extraction de filigrane non aveugle à l'aide de caractéristiques de données média numériques WO2008066235A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/516,614 US20100063978A1 (en) 2006-12-02 2007-07-23 Apparatus and method for inserting/extracting nonblind watermark using features of digital media data

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2006-0121083 2006-12-02
KR20060121083 2006-12-02
KR10-2007-0024095 2007-03-12
KR1020070024095A KR100834095B1 (ko) 2006-12-02 2007-03-12 디지털 미디어의 데이터 고유특성을 이용한 논블라인드워터마크 삽입/추출 장치 및 워터마크 삽입/추출 방법

Publications (1)

Publication Number Publication Date
WO2008066235A1 true WO2008066235A1 (fr) 2008-06-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120163654A1 (en) * 2010-12-22 2012-06-28 Electronics And Telecommunications Research Institute Method and system for tracking illegal distributor and preventing illegal content distribution

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002087251A1 (fr) * 2001-04-20 2002-10-31 Markany Inc. Procede et dispositif d'insertion et de detection de tatouage numerique
KR20030044471A (ko) * 2001-11-30 2003-06-09 유리텍 주식회사 워터마크 생성 및 삽입, 디지털 컨텐츠 및 워터마크추출을 위한 장치
WO2006049430A1 (fr) * 2004-11-05 2006-05-11 Colorzip Media, Inc. Code mixte, procede et dispositif pour la production de ce code, procede et dispositif pour son decodage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002087251A1 (fr) * 2001-04-20 2002-10-31 Markany Inc. Procede et dispositif d'insertion et de detection de tatouage numerique
KR20030044471A (ko) * 2001-11-30 2003-06-09 유리텍 주식회사 워터마크 생성 및 삽입, 디지털 컨텐츠 및 워터마크추출을 위한 장치
WO2006049430A1 (fr) * 2004-11-05 2006-05-11 Colorzip Media, Inc. Code mixte, procede et dispositif pour la production de ce code, procede et dispositif pour son decodage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120163654A1 (en) * 2010-12-22 2012-06-28 Electronics And Telecommunications Research Institute Method and system for tracking illegal distributor and preventing illegal content distribution
US8824728B2 (en) * 2010-12-22 2014-09-02 Electronics And Telecommunications Research Institute Method and system for tracking illegal distributor and preventing illegal content distribution

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