居民地数据高保真水印模型  

High-fidelity watermarking model for building polygons

作　　者：吴柏燕 王艳军 王超[2] WU Baiyan;WANG Yanjun;WANG Chao(National-Local Joint Engineering Laboratory of Geospatial Information Technology,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China)

机构地区：[1]湖南科技大学地理空间信息技术国家地方联合工程实验室,湖南湘潭411201 [2]武汉大学测绘遥感信息工程国家重点实验室,武汉430079

出　　处：《测绘科学》2019年第9期185-190,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41201389);测绘遥感信息工程国家重点实验室基金项目(11I04);地理空间信息工程国家测绘地理信息局重点实验室基金项目(201121)

摘　　要：针对居民地数据对形状变形比较敏感,从而导致水印不可见的问题,该文提出了一种保持形状的居民地数据高保真水印模型。利用几何图形相似变换,基于量化索引调制(QIM)思想,将水印信息调制于多边形对象的空间关系中。同时,通过数据哈希分组及水印位重复嵌入的方式,将水印信息散布到整个数据集中。水印检测时,基于QIM思想及投票机制提取水印位。实验结果表明,提出的水印模型在对居民地数据添加水印时,很好地保持了水印的不可见性。同时,在抵抗各种常见矢量数据水印攻击方面也具有较好的鲁棒性。利用多边形相似变换对居民地数据添加水印,对矢量地图数据鲁棒水印算法的设计,具有参考意义。According to the fact that building polygons consist of very sparse vertexes and are very sensitive to shape distortions,a high-fidelity watermarking model for building polygons which has good shape retention is proposed.Watermark bits are modulated into the spatial relations between objects using similar transformation of geometries based on Quantized Index Modulation(QIM).The watermark bits are scattered across the whole dataset by Hash mapping and bits repeated insertion and detected based on QIM and voting mechanism accordingly.Results have showed the robustness against the threatening watermark attacks,and the watermark invisibility has been improved greatly.The high-fidelity watermarking model proposed here adds watermark bits into building polygons using similar transformation,and has some reference value for developing other robust watermarking methods for vector map data.

关 键 词：数字水印 居民地数据 相似变换 保真度 鲁棒性 

分 类 号：P208[天文地球—地图制图学与地理信息工程]