【摘要】 针对传统矢量地图水印算法多基于地图坐标点进行构造,当地图经过编辑、简化、裁剪等操作时,水印难以恢复的缺陷,提出了一种基于矢量地图要素编码的零水印算法,该算法不修改地图的空间数据,仅利用地物的要素编码构造水印,从而能更好地平衡水印嵌入容量与不可见性之间的矛盾,能有效保证矢量地图精度不受影响,且地图水印具有较强的稳健性。更多还原

【Abstract】 Digital watermark is one of the effective ways to protect intellectual property rights for vector maps.The traditional watermarking algorithms of the vector map are mostly based on map coordinates.When the map is edited,simplified,cut and so on,the watermark is difficult to recover.In this paper,a zero-watermark algorithm based on elements codes of the vector map is studied,which does not modify the spatial data of the map,using only feature codes to construct watermarking,so it can better balance the contradictions between the capacity and invisibility of the embedded watermark.The new method can effectively guarantee that the accuracy of the vector map is not affected,and the watermark has a strong robustness.更多还原