MULTIRESOLUTION WATERMARKING FOR IMAGES AND VIDEO: A UNIFIED APPROACH
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by Wenwu Zhu Y, Zixiang Xiong, Ya-qin Zhang Z
http://clip.informatik.uni-leipzig.de/toelke/Watermark/ma11_09.pdf
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Abstract:
This paper proposes a uni ed approach to digital watermarking of images and video based on the 2D and 3D discrete wavelet transforms. The hierarchical nature of the wavelet representation allows mutliresolutional detection of the digital watermark, which isa Gaussian distributed random vector added to all the highpass bands in the wavelet domain. We show that, when subjected to distortion from compression or image halftoning, the corresponding watermark can still be correctly identi ed at each resolution (excluding the lowest one) in the wavelet domain. Computational saving from such amutliresolution watermarking framework is obvious, especially for the video case. 1.
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