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基于DCT和SVD联合的数字水印算法
引用本文:曾志华,钱雪忠.基于DCT和SVD联合的数字水印算法[J].计算机工程与设计,2007,28(1):109-111.
作者姓名:曾志华  钱雪忠
作者单位:江南大学,信息工程学院,江苏,无锡,214122
摘    要:离散余弦变换(discrete cosine transform,DCT)和奇异值分解(singular value decomposition,SVD)都可以作为数字水印算法有效的工具,现提出了一种基于离散余弦变换和奇异值分解联合的数字水印算法,先对整幅图像运用离散余弦变换,将离散余弦系数按照"之"字型顺序绘制成4个象限,然后再对每个象限运用奇异值分解方法.实验结果表明本算法具有很好的稳健性,在经过了一般的信号处理操作和JPEG压缩后,嵌入的水印能被可靠的提取和检测.

关 键 词:稳健的  版权保护  数字水印  离散余弦变换  奇异值分解  数字  水印算法  based  digital  watermarking  algorithm  检测  提取  压缩  JPEG  处理操作  信号  结果  实验  分解方法  象限  绘制  字型  系数  离散余弦  运用  图像
文章编号:1000-7024(2007)01-0109-03
修稿时间:2005-12-10

Hybrid digital watermarking algorithm based on DCT and SVD
ZENG Zhi-hua,QIAN Xue-zhong.Hybrid digital watermarking algorithm based on DCT and SVD[J].Computer Engineering and Design,2007,28(1):109-111.
Authors:ZENG Zhi-hua  QIAN Xue-zhong
Affiliation:School of Information Technology, Southern Yangtze University, Wuxi 214122, China
Abstract:Discrete cosine transform(DCT) and singular value decomposition(SVD) have been used as tools for embedding data into an image.A hybrid watermarking algorithm based on DCT and SVD is proposed,after applying the DCT to the whole image and mapping the DCT coefficients in a zig-zag order into four quadrants,and then applying the SVD to each quadrant.Experimental results show that the watermarking algorithm performs well in robustness,the embedded watermark is detected reliably,following usual signal processing and JPEG compression.
Keywords:robust  copyright protection  digital watermarking  discrete cosine transform  singular value decomposition
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