Research Of 3D Digital Watermarking

Digital productions facilitate the distribution and storage of information. But the copyright of digital productions must be protected. Digital watermarking is a way for copyright protecting. More and more research about watermarking are doing. Current watermarking technology fours on image , audio, video and text. The problem of watermarking 3D models received less attention. First watermarking 3D model is brought by ohbuchi in 19997, and some research had been done. But watermarking 3D model technology is not mature because 3D model data is distinguishingly, especially 3D model can not be decomposed like images. So the research of watermarking 3D models is faced with difficult.Vertex global arrangement watermarking algorithm is proposed in this paper, it is based on planar parameterization watermarking algorithm. Geometry attribute and appearance attribute of 3D models can be embedded watermarking in the two algorithms.To overcome the difficult of 3D model's decomposing planar parameterization algorithm is proposed by Bao Hunjun, 3D data will be transformed to 2D data in this algorithm. But it is difficult to realize, so vertex global arrangement watermarking algorithm is proposed in this paper, 3D data can be transformed to 2D data in this algorithm also. All the watermarking algorithm for images can be used in the two models.Watermarking is embedded in the geometry attribute of 3D models in the vertex global arrangement watermarking algorithm, DCT and DWT will be used in watermarking algorithm. Planar parameterization is improved and two watermarking algorithms are compared in this paper.Watermarking algorithm based on appearance attribute of 3D models is few. The two watermarking algorithms can be used in appearance attribute of 3D models, watermarking is embedded in color, normal vector, texture vector, experimentation result show that these algorithms are transparent and robust.