Research on digital watermarking algorithms for the 3d mesh model in the spatial domain and 3d shape model defined as a point set is made.

本论文分析了三维几何模型数字水印的基本原理和方法，研究了空域中的三维网格水印算法和三维点集模型的水印算法。

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Then this thesis summed up the research on digital watermarking technology used to protect vector maps, as well as the research on authenticating the integrity of vector maps.

接着总结了矢量地图数据证数字水印技术的研究，以及矢量地图完整性认证方法的研究。

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In this paper, a dual color image watermarking algorithm is proposed based on the research of color digital watermark.

本文对彩色水印技术进行了详细地研究，提出了一种双彩色数字水印方案。

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