一种空间域矢量地图数据盲水印算法

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。

A Watermarking Algorithm for Vector Maps in Spatial Domain

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.