IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Cryptanalysis of “wavelet tree quantization” watermarking scheme
IWDC'04 Proceedings of the 6th international conference on Distributed Computing
Joint wavelet and spatial transformation for digital watermarking
IEEE Transactions on Consumer Electronics
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
Optimal differential energy watermarking of DCT encoded images and video
IEEE Transactions on Image Processing
Wavelet tree quantization for copyright protection watermarking
IEEE Transactions on Image Processing
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Wavelet tree based watermarking algorithms are generally using the wavelet coefficient energy difference for copyright protection and ownership verification. Since there are cryptanalysis based methods addressed for successfully attacking wavelet tree based watermarking algorithm of WTQ, it is the motivation in this research to devise a scheme to improve WTQ's robustness. Therefore, a chaotic system is adopted for WTQ to counteract the attacks in this paper. The digital image is first split into many blocks and the chaotic system is applied to scramble the image before the implementation of WTQ. The experimental results demonstrate the effectiveness of using chaotic system to enhance the security of WTQ, especially, to resist cryptanalysis attack. In addition, such mechanism also works for other wavelet tree based algorithms like WTGM and TED.