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The concept of 3D Watermarking algorithm which is non blind and must be robust against different attack is the novel area of research. There are huge requirement of developing a robust and effective watermarking strategies to protect the illegal distribution of proprietary 3D objects. In the proposed algorithm which alter the size of vertex normal according to the digest of watermark bit to be embedded in repeated pattern. In a non-blind watermark detection scheme, this can identify the watermark in referring to the cover mesh model. The proposed technique is evaluated for robustness, experimentally by simulating attacks such as introducing noise, smoothing, cropping.
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