基于预测与排序的大容量可逆水印算法  

High capacity reversible watermarking algorithm based on prediction and sorting

作　　者：蒋华[1] 邓雄[1] 刘燕丽[1] 刘同来[1] 

机构地区：[1]桂林电子科技大学计算机与控制学院,桂林541004

出　　处：《计算机应用》2010年第11期3040-3043,共4页journal of Computer Applications

基　　金：广西自然科学基金资助项目(0991071)

摘　　要：针对大多数情况下可逆水印算法需要位图的情况,提出了一个不需要位图的可逆水印算法。该算法使用一种新的基于高效排序的全邻预测算法,经过排序以后形成预测误差集合,可以在很低失真度的情况下嵌入数据。实验的结果表明,该算法优于现有的可逆水印算法,并可以在具有较小失真度的情况下嵌入大量的数据。Concerning most of the existing reversible watermarking algorithms need a location map, this paper presented a reversible watermarking algorithm for images without using a location map. This algorithm employed full-enclosing prediction based on a new high efficient sorting technique and results in a forecast error set after sorting, which could embed data with a low distortion. The experimental results clearly indicate that this scheme is superior to most of the existing reversible watermarking algorithms and can embed large data with low distortion.

关 键 词：大容量 可逆水印 排序 全邻预测 直方图平移 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]