两种传统的数字水印算法的性能比较  

Comparing Features of DCT Digital Watermarking Algorithm With Those of DWT

作　　者：程兴国[1] 

机构地区：[1]襄樊学院物理系,湖北襄樊441053

出　　处：《通信技术》2007年第11期344-346,共3页Communications Technology

摘　　要：文中阐述了DCT数字水印算法与DWT数字水印算法的基本概念、基本原理及具体算法实现。通过二个最基本的性能评估指标:误码率和峰值信噪比,来定量比较二种水印算法在含水印图像受到各种处理时显现的鲁棒性。实验结果表明:DWT数字水印算法的性能要更优于DCT数字水印算法的性能。This paper describes some basic concepts ,basic principles and applied methods about DCT digital watermarking algorithm and DWTdigital watermarking algorithm. The robustness of the two methods are quantitatively analyzed by two basic evaluation parameter-ER and PSNR. Experimental results indicate that DWTdigital watermarking algorithm is more robust in image processing and JPEG compression than DCT digital watermarking algorithm.

关 键 词：离散余弦变换 离散小波变换 数字水印 直流分量 交流分量 

分 类 号：TN918[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]