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| 一种基于DWT和DFT的数字图像水印算法 | |
| 引用本文： | 余江龙,张学杰. 一种基于DWT和DFT的数字图像水印算法[J]. 云南民族大学学报(自然科学版), 2004, 13(3): 210-213 |
| 作者姓名： | 余江龙 张学杰 |
| 作者单位： | 云南大学,计算机科学与工程系,云南,昆明,650091 |
| 基金项目： | 云南省科技攻关重点项目基金资助项目(2002GG15)，云南省自然基金资助项目(2000YP20)，云南省省院省校合作基金资助项目(2001JAALA02A022) |
| 摘 要： | 提出了一种基于小波变换和离散余弦变换的数字图像水印算法.此算法首先对原始图像进行一级小波分解,再对其低频系数进行离散余弦变换,调整DCT中频系数的相对值,最后把由{-1,1}组成的伪随机序列嵌入其中.试验结果显示,此算法对JPEG压缩、gauss噪音有较强的鲁棒性. |
| 关 键 词： | 数字图像水印 小波变换 离散余弦变换 |
| 文章编号： | 1672-8513(2004)03-0210-04 |
| 修稿时间： | 2004-03-02 |
A digital image watermarking algorithm based on discrete wavelet transform and discrete cosine transform |
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| YU Jiang-long,ZHANG Xue-jie. A digital image watermarking algorithm based on discrete wavelet transform and discrete cosine transform[J]. Journal of Yunnan Nationalities University:Natural Sciences Edition, 2004, 13(3): 210-213 | |
| Authors: | YU Jiang-long ZHANG Xue-jie |
| Abstract: | In this paper, a digital image watermarking algorithm based on DWT and DCT is proposed. Firstly the original image is first-level discrete wavelet transformed, the first level low frequency coefficients are discrete cosine transformed, and then DCT medi-frequency coefficients are adjusted in which pseudorandom number sequences {-1,1} are embedded. Moreover, experimental results have proved that the method has good robustness to JPEG compression, gaussian noise pollution and image cropping processing. |
| Keywords: | digital image watermark discrete wavelet transform discrete cosine transform |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |