一种鲁棒的矢量地图数据的数字水印

数字水印是多媒体数据版权保护的一种有效方法。为了将水印技术应用于矢量地图数据的版权保护，根据矢量地图数据各要素层所合数据的多少，设计两种不同的数据分类规则，以实现嵌入不同大小的水印信息。通过仿真实验，可以看出算法具有很好的不可感知性和鲁棒性，尤其是抵抗矢量地图数据最常受到的对数据正常的增加、删除、修改、局部裁剪等更新操作。

A Robust Digital Watermarking in Cartographic Data in Vector Format

Digital watermarking is an efficient solution to copyright protection of multimedia.A novel watermarking algorithm is proposed for copyright protection of cartographic data in vector format.To embedding watermarking of different size,two kinds of data classification rules are designed according to the amount of cartographic data of each layer.The experiments show that the algorithm is fairly good in imperceptibility and robustness,especially can resist renewal operations,such as adding,deleting,modifying and cutting out,and so on.