两种典型数字水印嵌入算法的鲁棒性比较  

Robustness Comparison of Two Typical Watermark Embedding Algorithms

作　　者：杨露[1] 刘真[1] 张镭[1] YANG Lu,LIU Zhen,ZHANG Lei （Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China）

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京210037

出　　处：《电脑知识与技术》2013年第12期7834-7838,共5页Computer Knowledge and Technology

摘　　要：该文阐述了扩频和量化两类嵌入算法的基本原理，并选择各自典型代表算法加性扩频算法和抖动调制量化算法基于MATLAB具体实现，实验比较在分块DCT变换下两种嵌入算法的鲁棒性能。结果表明：抖动调制量化水印算法相比于加性扩频水印算法在抵抗缩放、滤波攻击和JPEG压缩方面有着更好的鲁棒性能，但在抵抗噪声攻击方面不如其稳定，且鲁棒性较低。The paper described the basic principles of two kinds embedding algorithms of spread spectrum and quantization. They were respectively applied with additive spread spectrum algorithm and dither modulation （DM） quantization algorithm. The two algorithms were programmed by Matlab and experiments were designed to compare the robustness of the two embed-ding algorithms under block DCT transforms. The result shows that DM quantization digital watermark algorithm is more robust to scaling attacks、filtering attacks and JPEG compression, but less stable and robust to noise attacks than additive spread spectrum algorithm.

关 键 词：数字水印 扩频 量化 离散余弦变换 鲁棒性 

分 类 号：TP301[自动化与计算机技术—计算机系统结构;自动化与计算机技术—计算机科学与技术]