抗拼接处理的地理空间数据水印检测方法  

Anti-splicing Geospatial Data Watermarking Inspection Method

作　　者：符浩军 范承啸 朱长青[2] 王刚 

机构地区：[1]西安测绘总站,陕西西安710054 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046

出　　处：《地理空间信息》2015年第3期17-19,8,共3页Geospatial Information

基　　金：国家自然科学基金资助项目(41071245)

摘　　要：对抗拼接处理的地理空间数据水印检测方法进行了研究。首先针对已有水印算法的不足,分析了地理空间数据拼接处理的特征及其对水印算法产生的影响,在此基础上,以现有研究成果为原型,引入四叉树分块递归判断的思想,设计了一种基于四叉树的地理空间数据水印检测方法,以解决数据拼接处理所引发的水印新问题。实验结果证明,该方法不仅能判断出拼接数据中含有怎样的水印信息,同时能对特定水印信息所对应的数据区域进行较精确的定位。Watermarking inspection method for geospatial data to resist splicing attack was conducted in this paper. Firstly, in view of the insufficiency in previous watermarking algorithms, the characteristics of splicing attack and effects on watermarking algorithm were analyzed. And then, taking current production for a prototype algorithm and introducing the idea of quad-tree block recursive judgment, an antisplicing geospatial data watermarking inspection method was designed to resolve new watermark problem which brought by data splicing attack. Experimental results show that the proposed method not only can inspect watermark exactly from the watermark data which suffer data splicing attacks, but also can ascertain data area exactly which correspond to specifically watermarking information from watermark data.

关 键 词：地理空间数据 水印检测 数据拼接 四叉树 区域定位 

分 类 号：P208[天文地球—地图制图学与地理信息工程]