Scale-invariant image watermarking via optimization algorithms for quantizing randomized statistics
Proceedings of the 2004 workshop on Multimedia and security
Improved spread spectrum: a new modulation technique for robust watermarking
IEEE Transactions on Signal Processing
Scalar Costa scheme for information embedding
IEEE Transactions on Signal Processing
Informed watermarking by means of orthogonal and quasi-orthogonal dirty paper coding
IEEE Transactions on Signal Processing
Performance analysis of ST-DM watermarking in presence of nonadditive attacks
IEEE Transactions on Signal Processing - Part II
IEEE Transactions on Information Theory
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
Applying informed coding and embedding to design a robust high-capacity watermark
IEEE Transactions on Image Processing
Digital Watermarking and Steganography
Digital Watermarking and Steganography
Watermarking is not cryptography
IWDW'06 Proceedings of the 5th international conference on Digital Watermarking
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Rational Dither Modulation has been proposed as an effective QIM watermarking algorithm which is robust against value-metric scaling. Invariance is obtained by quantizing a rational function of the host features instead of the features themselves. In this paper we propose a vector extension of the basic RDM scheme. Specifically, a sequence of feature ratios is quantized vectorially with the aid of a properly designed dirty trellis code. A fast sub-optimum embedding algorithm is proposed ensuring fast watermark insertion and good distortion properties. Preliminary results show that a significant advantage is obtained with respect to conventional RDM.