No.6（2011）1.A Study of Degital Watermarking for 3D models

Norihiro Ohira, Mamoru Ohara, Takashi Yamaguchi

  A numerically stable digital watermarking for 3D model authentication is reported here. In 3D watermarking for preventing forgery, some watermarking methods that slightly perturb the positions of a subset of vertices are proposed. However, these schemes have some numerical and security problems. For example, one using floating-point arithmetic was pointed out to be unable to authenticate some cases correctly for numerical reasons. The other that uses integer arithmetic can be easily altered and the amount of embedded watermark data is small. We focused our attention on developing a new watermark method for resolving such problems. In the developed method, we could embed sufficiently more watermarking data than previous methods which is also numerically stable and secure against falsification.
 

Keywords
3D model, digital watermarking, protecting falsification

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