中文摘要：

提出了一种新的二维矢量数字地图的零水印算法。该算法选择矢量地图的顶点作为重要特征,把地图按坐标进行平均分块并统计各个分块中的顶点个数,利用变换与加密构造出标志版权信息的水印图。由于该算法不对原始地图数据进行任何修改,这使得传统水印算法的稳健性、安全性和不可感知性之间的矛盾用这种特殊的方法得到了很好的解决。实验结果表明,该零水印算法能够抵抗多种常见的攻击,可以用来对矢量数字地图进行版权保护。

英文摘要：

A new zero-watermark copyright protection algorithm for 2D vector maps is proposed. The vertices are selected as feature information, we divide the map into grids and use the number of vertices, which are selected as feature information, in each grid and copyright information to construct a watermark image. Due to no modification is done to original vector map, the contradiction among robustness, security and imperceptibility is resolved in the traditional watermarking algorithm. Experimental results show that the zerowatermark copyright protection scheme can resist various regular attacks, and is used for copyright protection.