DWT domain watermarking for resisting Geometric attacks
In this paper, a multi-channel DWT domain image watermarking which is robust to geometric attacks is proposed, Firstly, this DWT domainwatermarking generates a watermarking template referring to one channelpsilas DWT coefficients of the image. Secondly, thiswatermarking template is embedded into other DWT channel of this image.Because both watermarking template and watermarking image undergo same geometric attack, self-synchronization between the embedded watermarking and watermarking image can be obtained automatically during detecting watermarking.
Therefore, a high robust performance of resist geometric attack is gained. Finally, several experimental results are given to show that the proposed watermarkingalgorithm achieves a high robustness even if an image undergoes some serious geometric distortion attacks.
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