一种空间域矢量地图数据盲水印算法

A Watermarking Algorithm for Vector Maps in Spatial Domain

对目前已有的针对二维矢量数据的水印算法进行了分析,并提出了一种新的鲁棒的盲水印算法。该算法首先将矢量数据分块,然后在不同分块中,结合密钥修改某些点的x坐标或者y坐标,从而嵌入水印信息。实验证明,该算法对平移、坐标转换、制图综合、插值等常规操作以及地物对象顺序置乱等攻击具有较好的鲁棒性,并且是一种盲检算法,具有较好的实用价值。

Digital watermarking algorithms for vector digital maps are an efficient method to counter abuses of the maps. We analyzed current methods of watermarking for digital vector geo-data and presented a new robust blind watermarking approach. The proposed algorithm starts with the area subdivision, then watermarking is embedded into length of vector by changing some x coordinates or y coordinates. The experiments show that the proposed algorithm could effectively resist the attack of noise, removing points, adding points, deleting points, and so on.