| 离散小波变换和混沌结合的数字图像水印算法 |
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| 引用本文： | 王强,丁群,张忠.离散小波变换和混沌结合的数字图像水印算法[J].电子测量与仪器学报,2008,22(5). |
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| 作者姓名： | 王强 丁群 张忠 |
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| 作者单位： | 1. 黑龙江大学电子工程学院,哈尔滨,150080;中国人民解放军65923部队,154000
2. 黑龙江大学电子工程学院,哈尔滨,150080 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金 |
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| 摘 要： | 提出了一种基于离散小波变换和混沌理论的数字图像水印算法.在水印嵌入过程中,首先对原始图像进行离散小波变换,提取其低频部分作为嵌入区域;然后利用混沌系统产生的混沌序列对水印进行加密,再将加密后的水印进行小波变换并提取其低频部分;最后将加密水印的低频部分嵌入到原始图像的低频部分中.水印提取过程需要原始载体图像,是一种明检测.通过水印相关系数NC和峰值信噪比PSNR评价水印算法性能.实验结果表明,提出的算法可以抵抗JPEG压缩、噪声、滤波等攻击,图像水印效果很好.
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| 关 键 词： | 小波变换 混沌 加密水印 |
DWT and Chaos Combined Digital Image Watermark Algorithm |
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| Wang Qiang,Ding Qun,Zhang Zhong.DWT and Chaos Combined Digital Image Watermark Algorithm[J].Journal of Electronic Measurement and Instrument,2008,22(5). |
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| Authors: | Wang Qiang Ding Qun Zhang Zhong |
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| Affiliation: | Wang Qiang Ding Qun Zhang Zhong(1.Electronic Engineering College,Heilongjiang University,Harbin 150080,China,2.Unit 65923 of PLA,154000,China) |
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| Abstract: | In this paper, a digital image watermark algorithm based on discrete wavelet transform and chaos theory is proposed. During the embedding of the watermark, discrete wavelet transform is carried out firstly and its low frequency part is extracted and used as the embedding field; then the chaotic sequence is used to encrypt the watermark, and wavelet transform is performed on the encrypted part and the low frequency part is extracted; finally, the low frequency part of the encrypted watermark is embedded into... |
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| Keywords: | wavelet transform chaos encrypted watermark |
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