Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-02-28
2006-02-28
Jung, David (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S179000, C382S276000
Reexamination Certificate
active
07007167
ABSTRACT:
A watermarking system allowing an appended-type watermark to be easily inserted into a scaled-up/down image without deteriorating the detection accuracy of the appended-type watermark is disclosed. A first scaling factor of an input watermarked image is detected by detecting a copy control watermark from the input watermarked image. It is determined whether a watermark including a second scaling factor is detected from the input watermarked image. When the watermark including the second scaling factor fails to be detected, a second watermark including the first scaling factor is created and embedded into the input watermarked image and further an appended-type watermark is inserted into the input watermarked image. When the watermark including the second scaling factor is detected, the first and second scaling factors are used to calculate a third scaling factor, which is used to detect the appended-type watermark.
REFERENCES:
patent: 6310956 (2001-10-01), Morito et al.
patent: 6374036 (2002-04-01), Ryan et al.
patent: 6636615 (2003-10-01), Rhoads et al.
patent: 10-155151 (1998-06-01), None
“Multimedia in the Teaching Space”, May 1998, [retrieved from Internet Mar. 16, 2005], http://www.agocg.ac.uk/reports/mmedia/casestdy/ucl/ucl.pdf.
Geometric moment in image watermarking; Zhang Li; Sam Kwong; Gang Wei; Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on vol. 2, May 25-28, 2003 Page(s):II-932-II-935 vol. 2.
Watermark re-synchronization using log-polar mapping of image autocorrelation; Alattar, A.M.; Meyer, J.; Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on vol. 2, May 25-28, 2003 Page(s): II-928-II-931 vol. 2.
Estimation of attacker's scale and noise variance for QIM-DC watermark embedding; Lagendijk, R.L.; Shterev, I.D.; Image Processing, 2004. ICIP '04. 2004 International Conference on vol. 1, Oct. 24-27, 2004 Page(s):55-58 vol. 1.
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