摘要
提出一种基于地图图层结构特征的数字水印算法。根据矢量地图所含结点、线路和区域3种图层的拓扑特点,定义不同的度量规则并引入模糊聚类分析方法,对矢量地图进行综合优化,获得地图内可供水印嵌入的矢量目标集合;同时,选用比特位复合的方式,将水印信息嵌入地图属性文件描述目标对象的坐标块中。研究结果表明：采用该算法达到了地图精度的零损伤要求;在不同矢量数据压缩比率下,该算法比其他方法的误码率低10%~20%;在抗几何攻击方面,该算法与同领域水印算法相比,所产生的平均误码率可降低50%。
A watermarking algorithm based on the characteristics of the structure of map layers was proposed.According to the topological characteristics of three basic layers such as nodes,segment,region in a vector map,with fuzzy clustering analysis methods,an optimized embedded target set was achieved by different appraisement rules.Using the bit-compound,watermark was embedded into the corresponding coordinate blocks of vector objects in an attribute file.The results show that the requirement of lossless accuracy can be achieved;false negative rates（FNR） can be reduced by 10%？20% at different compression ratios and compared with other algorithms mentioned,the average FNR will be reduced by 50%.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第4期1467-1472,共6页
Journal of Central South University:Science and Technology
基金
中央高校基础研究基金资助项目(HEUCF061006)
关键词
矢量地图
数字水印
结构特征
拓扑
vector map
digital watermarking
structure feature
topology
