25 search results - page 3 / 5 » A blind cdma image watermarking scheme in wavelet domain |
ICMCS
2006
IEEE
13 years 11 months ago
2006
IEEE
Blind multiplicative watermarking schemes for speech signals using wavelets and discrete cosine transform are presented. Watermarked signals are modeled using a generalized Gaussi...
JEI
2006
13 years 5 months ago
2006
For copyright protection, the robustness of a watermarking scheme against various attacks is an essential requirement. Many proposed robust watermarking schemes may achieve good r...
ICASSP
2011
IEEE
12 years 9 months ago
2011
IEEE
A robust data hiding scheme that embeds the watermark bits by quantizing the gradient directions of an image is proposed. By embedding the watermark in the angle, the watermark be...
ICMCS
2006
IEEE
13 years 11 months ago
2006
IEEE
The distribution of the wavelet coefficients in 2-D discrete wavelet transform (DWT) subspaces can be well described by a Gaussian mixture statistical model. In this paper, a secr...
ICIP
2002
IEEE
14 years 7 months ago
2002
IEEE
Geometric attacks are among the most challenging problems in present day watermarking. Such attacks are very simple to implement yet they can defeat most of the existing watermark...