Image analysis – Applications
Reexamination Certificate
2007-11-27
2007-11-27
Mehta, Bhavesh M (Department: 2624)
Image analysis
Applications
C380S054000, C713S176000, C358S003280
Reexamination Certificate
active
10648517
ABSTRACT:
An apparatus and method for preventing illegitimate distribution of digital contents on Internet obtains a first wavelet image having a user information-embedding region by performing a wavelet transformation (WT). The user information embedding region of the first wavelet image is wavelet-transformed to obtain a second wavelet image composed of a discrete cosine (DC) region and high-frequency regions second wavelet image. A high-frequency components removed image is obtained by removing high-frequency components in the high-frequency regions of the second wavelet image, and subjected to an inverse WT (IWT) to be outputted as an IWT image. A user information embedding unit embeds user information to the IWT image, wherein data of the user information are sequentially embedded to positions where a difference value between the user information embedding region and the new user information embedding region is small, to thereby reset the user information embedding region as the user information.
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patent: 2003/0095682 (2003-05-01), Joo et al.
patent: 2003/0099373 (2003-05-01), Joo et al.
Birgit Pfitzmann, et al.;“Anonymous Fingerprinting”; Proceedings of Eurocrypt '97, LBCS, Springer-Verlag, Berlin 1997; pp. 1-15.
Joo Sanghyun
Kim Won Gyum
Park Chang Soon
Seo Yong-Seok
Electronics and Telecommunications Research Institute
Kim Charles
Lowe Hauptman & Ham & Berner, LLP
Mehta Bhavesh M
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