1 bit/pixel嵌入率的差扩展可逆水印方案  

One bit/pixel reversible watermarking approach based on difference expansion

作　　者：张天聪 翁韶伟[2] 

机构地区：[1]广东国华粤电台山发电有限公司,广东台山529228 [2]广州工业大学信息工程学院,广州510090

出　　处：《计算机应用》2009年第B06期92-94,共3页journal of Computer Applications

摘　　要：提出了一种新的基于差扩展的可逆水印方案,此方案在一次嵌入过程中能实现1bpp的嵌入率。该方法需借助一个位置图来标示在嵌入过程中用于差扩展的像素对位置,对位置图进行无损压缩,并把压缩后的位置图作为嵌入数据的一部份嵌入到原始图像中,因此,通过改变位置图中"0","1"分布从而能高效压缩位置图,最终获得较高的嵌入容量。实验结果证明该方法的性能优于已存可逆水印算法的性能。A novel difference expansion based embedding scheme was presented in this paper to achieve the embedding rate of around 1 bit per pixel （bpp） for a single embedding process. Meanwhile, the size of the location map which is frequently used to identify those expanded pixels will also be doubled. High compressibility can be achieved by reshaping the distribution of the location map, and thus the embedding capacity is considerably increased. Experimental results reveal the proposed scheme is effective.

关 键 词：可逆水印 差扩展 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]