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| 一种自适应的数字栅格地图可见水印算法 | |
| 引用本文： | 朱长青,符浩军,缪剑,王玉海.一种自适应的数字栅格地图可见水印算法[J].测绘学报,2013,42(2):304-316. |
| 作者姓名： | 朱长青 符浩军 缪剑 王玉海 |
| 作者单位： | 1. 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;信息工程大学地理空间信息学院,河南郑州450052 2. 信息工程大学地理空间信息学院,河南郑州450052;61363部队,陕西西安710054 3. 61363部队,陕西西安,710054 4. 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 |
| 摘 要： | 基于数字栅格地图的数据特性,运用小波变换工具,结合人类视觉系统特征,提出一种自适应的数字栅格地图可见水印算法。首先,对可见水印信息进行扩展等预处理;然后通过计算数字栅格地图的视觉重要区域来选择水印嵌入位置,水印嵌入位置由人类视觉系统特征和地图数据特性共同决定;最后,将可见水印自适应地嵌入地图所选择嵌入区域的小波域中。对提出的水印算法进行了试验分析,结果表明,该算法不仅具有良好的抗差性,同时还较好地保持了可见水印和原地图的视觉特征,以一种更积极有效的方式保护了数字栅格地图的版权。 |
| 关 键 词： | 数字栅格地图 可见水印 嵌入位置 小波变换 人类视觉系统 |
| 收稿时间： | 2011-07-04 |
Adaptive Visible Watermarking Algorithm for Digital Raster Map |
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| ZHU Changqing,FU Haojun,MIAO Jian,WANG Yuhai.Adaptive Visible Watermarking Algorithm for Digital Raster Map[J].Acta Geodaetica et Cartographica Sinica,2013,42(2):304-316. | |
| Authors: | ZHU Changqing FU Haojun MIAO Jian WANG Yuhai |
| Institution: | 1.Key Laboratory of Virtual Geographic Environment,Nanjing Normal University,Nanjing 210054,China;2.Institute of Surveying and Mapping,Information Engineer University,Zhengzhou 450052,China;3.61363 Troops,Xi’an 710054,China |
| Abstract: | This paper proposed a new visible watermarking algorithm for the digital raster map based on wavelet transformation and the characteristics of human visual systems. The features of digital raster map with higher luminance and greater variable pixel than natural image were utilized. By the proposed algorithm, The digital raster map was decomposed by integer wavelet transformation firstly, then the visible watermark image, which was pretreated by expansion technique, was adaptively embedded in the best embedding position, Position was determined by data features of digital raster map and the characteristics of human visual systems. Experimental results showed that watermarked image meet the requirements of visible watermarks quite well, The digital raster map received better protection. |
| Keywords: | Digital raster map Visible watermarking Best embedding position Wavelet transformation Human visual system |
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