一种基于矢量地图要素编码的零水印算法  

A zero-watermarking algorithm for vector map based on element coding

作　　者：孙鸿睿[1,2] 朱建军[1] 李光强[1] 施永胜[2] 

机构地区：[1]中南大学地球科学与信息物理学院,中南大学精密工程测量与形变灾害监测湖南省教育厅重点实验室,长沙410083 [2]常德市国土资源规划测绘院,湖南常德415000

出　　处：《工程勘察》2012年第9期54-57,共4页Geotechnical Investigation & Surveying

基　　金：湖南省科技计划项目(2009SK3053);湖南省教育厅重点实验室项目(09K006)

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。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.

关 键 词：矢量地图 要素编码 稳健性 零水印 

分 类 号：P285.4[天文地球—地图制图学与地理信息工程]