Two-dimensional signal and image processing
Two-dimensional signal and image processing
Fractal image compression: theory and application
Fractal image compression: theory and application
IEEE Transactions on Pattern Analysis and Machine Intelligence
Digital watermarking
Informed Watermarking
Texture Segmentation using 2-D Gabor Elementary Functions
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Stochastic Approach to Content Adaptive Digital Image Watermarking
IH '99 Proceedings of the Third International Workshop on Information Hiding
Exploiting self-similarities to defeat digital watermarking systems: a case study on still images
Proceedings of the 2004 workshop on Multimedia and security
Robust optimum detection of transform domain multiplicative watermarks
IEEE Transactions on Signal Processing
Blind pattern matching attack on watermarking systems
IEEE Transactions on Signal Processing
Security pitfalls of frame-by-frame approaches to video watermarking
IEEE Transactions on Signal Processing - Part II
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
Face authentication with Gabor information on deformable graphs
IEEE Transactions on Image Processing
A new decoder for the optimum recovery of nonadditive watermarks
IEEE Transactions on Image Processing
Countermeasures for collusion attacks exploiting host signal redundancy
IWDW'05 Proceedings of the 4th international conference on Digital Watermarking
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Block replacement attacks consist in exploiting the redundancy of the host signal to replace each signal block with another one or a combination of other ones. Such an attacking strategy has been recognized to be a major threat against watermarking systems e.g. additive spread-spectrum and quantization index modulation algorithms. In this paper, a novel embedding strategy will be introduced to circumvent this attack. The basic idea is to make the watermark inherit the self-similarities from the host signal. This can be achieved by imposing a linear structure on the watermark in a feature space e.g. the Gabor space. The relationship with existing multiplicative watermarking schemes will also be exhibited. Finally, experimental results will be presented and directions for future work will be discussed.