A reversible watermark scheme for 2D vector map based on reversible contrast mapping

A reversible watermark scheme for 2D vector map based on reversible contrast mapping
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基于可逆对比度映射的二维矢量图可逆水印方案

DOI:
10.1002/sec.680
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发表时间:
2013-09
影响因子:
--
通讯作者:
Long Min
Long Min
中科院分区:
计算机科学4区
文献类型:
--
作者:
Peng Fei;Chen Li;Long Min

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可逆水印适用于对水印精度要求较高的主机。然而,现有的可逆水印算法主要针对光栅图像,矢量图形可逆水印算法仍存在容量小、失真严重等缺陷。针对这些情况,提出了一种基于可逆对比度映射的二维矢量地图可逆水印方案。首先根据数据精度要求选取顶点坐标;然后对二维矢量地图数据进行预处理,减少失真。然后,利用可逆的对比度映射变换将加密后的水印嵌入到相对坐标中。实验结果和分析表明,与现有的基于差分扩展、离散余弦变换等方法的认证方案相比,该方案具有更高的有效载荷、更好的可逆性和不可见性,在地图数据认证和安全通信中具有很大的应用潜力.版权所有© 2012约翰威利父子有限公司.
Reversible watermark is suitable for the hosts with high precision requirement. However, the existed reversible watermark methods are mainly for raster images, and the reversible watermark schemes for vector graphics still have the defects such as low capacity and significant distortion. To counterstrike these situations, a reversible watermark scheme for two-dimensional vector map based on reversible contrast mapping is proposed. First, the coordinates of the vertices are chosen according to the data precision requirements; then, the data of two-dimensional vector maps are preprocessed to reduce distortion. After that, the encrypted watermark is embedded into the relative coordinates by using the reversible contrast mapping transform. Experimental results and analysis show that the proposed scheme can achieve higher payload, better reversibility, and invisibility than those of the existed schemes based on difference expansion, discrete cosine transform, and so on. It has great potential in the application of map data authentication and secure communication. Copyright © 2012 John Wiley & Sons, Ltd.
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