KR20000068878A - 워터마크의 검출방법 및 검출장치 - Google Patents
워터마크의 검출방법 및 검출장치 Download PDFInfo
- Publication number
- KR20000068878A KR20000068878A KR1019997003845A KR19997003845A KR20000068878A KR 20000068878 A KR20000068878 A KR 20000068878A KR 1019997003845 A KR1019997003845 A KR 1019997003845A KR 19997003845 A KR19997003845 A KR 19997003845A KR 20000068878 A KR20000068878 A KR 20000068878A
- Authority
- KR
- South Korea
- Prior art keywords
- watermark
- signal
- threshold
- thr
- information signal
- Prior art date
Links
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
- G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
- G06T1/0078—Robust watermarking, e.g. average attack or collusion attack resistant using multiple thresholds
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
- H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
- H04N2201/3233—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of authentication information, e.g. digital signature, watermark
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N2201/3269—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of machine readable codes or marks, e.g. bar codes or glyphs
- H04N2201/327—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of machine readable codes or marks, e.g. bar codes or glyphs which are undetectable to the naked eye, e.g. embedded codes
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Editing Of Facsimile Originals (AREA)
- Television Systems (AREA)
- Image Processing (AREA)
Abstract
Description
Claims (5)
- 정보신호(q)에 삽입된 워터마크(w)를 검출하며,상기 워터마크가 어느 정도의 양 만큼 상기 신호 내부에 존재하는가를 나타내는 판정 변수(y)를 결정하는 수단(21, 22)과,상기 판정 변수가 소정의 임계값(ythr)을 초과하는 경우에 워터마크의 검출을 나타내는 출력신호(D)를 발생하는 수단을 구비한 장치에 있어서,상기 정보신호의 통계학적 특징값(σ)과 잘못된 검출의 원하는 확률에 의존하여 상기 임계값(ythr)을 발생하는 수단을 구비한 것을 특징으로 하는 장치.
- 제 1 항에 있어서,상기 발생수단은, 상기 정보신호의 상기 통계학적 특징값(σ)을 얻기 위해 정보신호값의 표준편차(σ) 또는 분산값(σ2)을 계산하는 수단(24)을 구비한 것을 특징으로 하는 장치.
- 제 2 항에 있어서,상기 발생수단은, 다음 관계에 따라 임계값(ythr)을 계산하는 수단(25)을 구비하고,이때, erfc는 오차 함수이며, σ는 정보신호값의 상기 표준편차인 것을 특징으로 하는 장치.
- 정보신호(q)에 삽입된 워터마크(w)를 검출하며,상기 워터마크가 어느 정도의 양 만큼 상기 신호 내부에 존재하는가를 나타내는 판정 변수(y)를 결정하는 단계와,상기 판정 변수가 소정의 임계값(ythr)을 초과하는 경우에 워터마크의 검출을 나타내는 출력신호(D)를 발생하는 단계를 포함하는 방법에 있어서,상기 정보신호의 통계학적 특징값(σ)과 잘못된 검출의 원하는 확률에 의존하여 상기 임계값(ythr)을 조절하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제 1 항 내지 제 3 항 중 어느 한 항에 기재된 장치를 구비한 것을 특징으로 하는 멀티미디어 재생 및/또는 기록장치.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97202699 | 1997-09-02 | ||
EP97202699.1 | 1997-09-02 | ||
PCT/IB1998/001313 WO1999012347A2 (en) | 1997-09-02 | 1998-08-21 | Method and arrangement for detecting a watermark |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20000068878A true KR20000068878A (ko) | 2000-11-25 |
KR100583359B1 KR100583359B1 (ko) | 2006-05-25 |
Family
ID=8228695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997003845A KR100583359B1 (ko) | 1997-09-02 | 1998-08-21 | 워터마크의 검출방법 및 검출장치 |
Country Status (7)
Country | Link |
---|---|
US (1) | US6252972B1 (ko) |
EP (1) | EP0941605B1 (ko) |
JP (1) | JP3946268B2 (ko) |
KR (1) | KR100583359B1 (ko) |
CN (1) | CN1143532C (ko) |
DE (1) | DE69828148T2 (ko) |
WO (1) | WO1999012347A2 (ko) |
Cited By (1)
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KR100888589B1 (ko) * | 2002-06-18 | 2009-03-16 | 삼성전자주식회사 | 반복적으로 삽입된 워터마크 추출방법 및 그 장치 |
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US7369677B2 (en) | 2005-04-26 | 2008-05-06 | Verance Corporation | System reactions to the detection of embedded watermarks in a digital host content |
US20060239501A1 (en) | 2005-04-26 | 2006-10-26 | Verance Corporation | Security enhancements of digital watermarks for multi-media content |
US7616776B2 (en) | 2005-04-26 | 2009-11-10 | Verance Corproation | Methods and apparatus for enhancing the robustness of watermark extraction from digital host content |
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CN108810619B (zh) * | 2018-06-29 | 2021-03-26 | 北京奇虎科技有限公司 | 识别视频中水印的方法、装置和电子设备 |
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US5825892A (en) * | 1996-10-28 | 1998-10-20 | International Business Machines Corporation | Protecting images with an image watermark |
-
1998
- 1998-08-21 WO PCT/IB1998/001313 patent/WO1999012347A2/en active IP Right Grant
- 1998-08-21 CN CNB988015900A patent/CN1143532C/zh not_active Expired - Lifetime
- 1998-08-21 EP EP98937722A patent/EP0941605B1/en not_active Expired - Lifetime
- 1998-08-21 DE DE69828148T patent/DE69828148T2/de not_active Expired - Lifetime
- 1998-08-21 JP JP51650699A patent/JP3946268B2/ja not_active Expired - Lifetime
- 1998-08-21 KR KR1019997003845A patent/KR100583359B1/ko not_active IP Right Cessation
- 1998-09-02 US US09/146,021 patent/US6252972B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100888589B1 (ko) * | 2002-06-18 | 2009-03-16 | 삼성전자주식회사 | 반복적으로 삽입된 워터마크 추출방법 및 그 장치 |
Also Published As
Publication number | Publication date |
---|---|
EP0941605A1 (en) | 1999-09-15 |
CN1143532C (zh) | 2004-03-24 |
WO1999012347A3 (en) | 1999-06-10 |
EP0941605B1 (en) | 2004-12-15 |
JP2001505753A (ja) | 2001-04-24 |
US6252972B1 (en) | 2001-06-26 |
JP3946268B2 (ja) | 2007-07-18 |
WO1999012347A2 (en) | 1999-03-11 |
KR100583359B1 (ko) | 2006-05-25 |
CN1246239A (zh) | 2000-03-01 |
DE69828148D1 (de) | 2005-01-20 |
DE69828148T2 (de) | 2005-12-22 |
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