Technique of embedding and detecting digital watermark

Details Technique of embedding and detecting digital watermark Technique of embedding and detecting digital watermark

2006-10-17

2006-10-17

Wu, Jingge (Department: 2623)

Image analysis

Applications

C713S176000

Reexamination Certificate

active

07123741

ABSTRACT:
A color conversion module42carries out color conversion of original color image data Grgbfrom the RGB color system into the CMYK color system to obtain color-converted original color image data Gcmyk(step S104). A DCT module44applies DCT (discrete cosine transform) over the whole color-converted original color image data Gcmykto generate DCT coefficients Dcmyk(step S106). An embedding module46embeds the watermark information s into the components C, M, Y, and K of the DCT coefficients Dcmyk(step S108). An IDCT module48applies IDCT (inverse discrete cosine transform) onto DCT coefficients D′cmykwith the watermark information s embedded therein to generate embedding-processed color image data G′cmyk(step S110). The color conversion module42carries out color conversion of the embedding-processed color image data G′cmykfrom the CMYK color system into the RGB color system to obtain embedding-processed color image data G′rgb(step S112). This arrangement does not require any correction of the position or the shape of image blocks in the process of extracting the embedded watermark information.

REFERENCES:
patent: 5991426 (1999-11-01), Cox et al.
patent: 6044156 (2000-03-01), Honsinger et al.
patent: 6208735 (2001-03-01), Cox et al.
patent: 6600828 (2003-07-01), Kawamura
patent: 6700991 (2004-03-01), Wu et al.
patent: 6721439 (2004-04-01), Levy et al.
patent: 6839673 (2005-01-01), Choi et al.
patent: 2002/0106104 (2002-08-01), Brunk et al.
Bernd Jahne, “Digital Image Processing—Concepts, Algorithms, and Scientific Applications,” Springer-Verlag, Abstract No. XP-002259494, pp. 56-62 (1991).
Kang et al., “Image Data Embedding System for Watermaking Using Fresnel Tarnsform,” IEEE Comput. Soc., pp. 885-889, (1999).
Hartung et al., “Digital Watermaking of MPEG-2 Coded Video in the Bitstream Domain,” IEEE Comput. Soc. pp. 2621-2624, (1997).
Rakocevic et al., “The Image Authenticity Confirmation by Modifying Spectral Components,” IEEE MeleCon, vol. 11, pp. 494-497, (2000).
Cox et al., “Secure Spread Spectrum Watermarking from Multimedia,” NEC Research Institute, Technical Report 95-10, Abstract No. XP-002259493, pp. 1-33, (1995).
Kowa Co., Ltd., Notification of the First Office Action, The Patent Office of the People's Republic of China. (Chinese Office Action with English Translation.) 4 pages.
Ingemar J. Cox, et al., “Secure Spread Spectrum Watermarking for Multimedia,” IEEE Transactions on Image Processing, vol. 6, No. 12, Dec. 1997.

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