一种鲁棒的矢量地图数字水印算法

通过分析矢量数据的特征,根据数据自身的奇异性,将水印嵌入到间隔的特征点中。在水印嵌入过程中,综合分析特征点在整个数据链中的奇异性,然后在奇异性较强的特征点中嵌入水印信息,并使嵌入水印的特征点的奇异性得到增强,而相对弱化其周围数据的奇异性,增强水印信息对数据的裁剪、融合以及随机添加和减少数据点的攻击的鲁棒性,从而在水印提取过程中得到正确的水印信息。

A robust water marking algorithm for vector digital maps

Through analyzing the characteristics of vector data,the watermarks are embedded in the spaced characteristic points,according to the unusualness of the data itself.While embedding the watermarks,the characteristic points' unusualness is analyzed synthetically.Then the watermark information in the points with higher unusualness is embedded.At the same time,the unusualness of those points is swelled and the unusualness of other points is decreased relatively.The robustness of the watermark information to the data's cutting,integrating and attacking from adding and reducing data points randomly is improved.Accordingly,the right watermark information can be gained during the watermarks are picked up.