一种基于直方图平移和局部复杂度的可逆水印算法  

A Reversible Watermarking Algorithm Based on Histogram Shifting and Local Complexity

作　　者：吴万琴[1] 阮文惠[1] 贺元香[1] 

机构地区：[1]兰州文理学院数字媒体学院计算机系,甘肃兰州730000

出　　处：《南京师大学报（自然科学版）》2016年第3期33-39,共7页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：甘肃省教育厅研究生导师项目(1215_04)

摘　　要：针对现有高容量水印嵌入算法中载体图像失真问题,本文提出一种基于直方图平移和局部复杂度的可逆水印算法.为确保较高的图像质量,该算法通过局部复杂度函数来区分宿主图像块是平滑还是复杂块,将平滑块嵌入水印信息,复杂块保持不变,不进行水印信息嵌入,以获得高质量图像.实验结果表明,与同类算法相比,该算法具有较好的图像质量和高嵌入容量.This paper proposed a reversible watermarking algorithm based on histogram shifting and local complexity in view of the existing problem of image distortion for high capacity watermarking algorithms. In order to obtain high quality image, this paper classified the cover image block into smooth blocks or complex blocks based on a local complexity function. Then, the smooth block embedded watermark information, complex blocks remained unchanged to increase embedding capacity and enhance image quality. The experimental results show that compared with other similar algorithms, this algorithm has better image quality and high embedding capacity.

关 键 词：可逆水印 局部复杂度 嵌入容量 像素值 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TN911[自动化与计算机技术—计算机科学与技术]