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Watermarking recursive hashes into frequency domain regions

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06K-009/00
출원번호 US-0689293 (2000-10-11)
발명자 / 주소
  • Tian, Jun
  • Decker, Stephen K.
  • Brunk, Hugh L.
출원인 / 주소
  • Digimarc Corporation
대리인 / 주소
    Meyer, Joel R.Digimarc Corporation
인용정보 피인용 횟수 : 113  인용 특허 : 19

초록

A watermark embedder transforms a media signal from its perceptual domain to frequency domain regions and embeds a hash of data from one frequency domain region into a watermark in another frequency domain region. Alternatively, it encodes instances of the same message into the frequency domain regi

대표청구항

A watermark embedder transforms a media signal from its perceptual domain to frequency domain regions and embeds a hash of data from one frequency domain region into a watermark in another frequency domain region. Alternatively, it encodes instances of the same message into the frequency domain regi

이 특허에 인용된 특허 (19)

  1. Senoh Takanori,JPX, Apparatus and method for watermark data insertion and apparatus and method for watermark data detection.
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  5. Fridrich Jiri, Digital watermarking by adding random, smooth patterns.
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  7. Adams Phillip M., Media-independent document security method and apparatus.
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  10. Powell Robert D. ; Nitzberg Mark J., Method and system for digital image signatures.
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  13. Rhoads Geoffrey B., Methods for surveying dissemination of proprietary empirical data.
  14. Rhoads Geoffrey ; Gustafson Ammon, Multiple watermarking techniques for documents and other data.
  15. Braudaway Gordon Wesley ; Mintzer Frederick Cole, Protecting images with an image watermark.
  16. Briggs Robert (Annandale VA) Iannacone Carmen (Fairfax VA) Rothey James (Fairfax VA) Evans David (Falls Church VA), Protection of an electronically stored image in a first color space by the alteration of a digital component in a second.
  17. Rhoads Geoffrey B. (West Linn OR), Steganography methods employing embedded calibration data.
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  19. Wu Min ; Liu Bede, Watermarking scheme for image authentication.

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