Robust DWT-SVD domain image watermarking: embedding data in all frequencies
Proceedings of the 2004 workshop on Multimedia and security
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
A new video watermarking algorithm based on shot segmentation and block classification
Multimedia Tools and Applications
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In this paper, we propose a wavelet-tree-based watermarking method for copyright protection by using distance vector of binary cluster. Wavelet trees are classified into two clusters using the distance vector, which is obtained from the two smallest coefficients of a wavelet tree, to denote binary watermark bits. The trees are classified into two clusters so that they exhibit a sufficiently large statistical difference based on the distance vector, which difference is then used for subsequent watermark extraction. The watermark is embedded in the insignificant coefficients of wavelet trees, and uses the difference of the distance between the two smallest wavelet coefficients to extract the watermark. Experimental results show that the proposed method is very efficient in resisting various kinds of attacks and the watermarked image looks visually lossless.