| 基于小波变换和复合混沌系统的数字图像水印算法 |
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| 引用本文： | 何立晖,张健沛,王强. 基于小波变换和复合混沌系统的数字图像水印算法[J]. 哈尔滨理工大学学报, 2010, 15(3): 14-18 |
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| 作者姓名： | 何立晖 张健沛 王强 |
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| 作者单位： | 哈尔滨师范大学,文理学院,黑龙江,哈尔滨,150301;哈尔滨工程大学,计算机科学与技术学院,黑龙江,哈尔滨,150001;黑龙江省军区装备部,黑龙江,哈尔滨,150001 |
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| 摘 要： | 提出了一种基于小波变换和复合混沌系统的数字图像水印算法.在水印嵌入过程中,算法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;在对水印进行加密时,不是使用以往单混沌序列,而是采用复合混沌系统产生的混沌序列;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.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,该算法可以抵抗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 复合混沌系统 加密水印 |
Digital Image Watermark Algorithm Based on Wavelet Transform and Compound Chaotic System |
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| HE Li-hui,ZHANG Jian-pei,WANG Qiang. Digital Image Watermark Algorithm Based on Wavelet Transform and Compound Chaotic System[J]. Journal of Harbin University of Science and Technology, 2010, 15(3): 14-18 |
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| Authors: | HE Li-hui ZHANG Jian-pei WANG Qiang |
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| Affiliation: | 1.College of Arts and Sciences,Harbin Normal University,Harbin 150301,China;2.Computer science and Technology College,Harbin Engineering University,Harbin 150001,China;3.Military Equipment Department of Heilongjiang Province,Harbin 150001,China) |
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| Abstract: | In this paper,a digital image watermark algorithm based on wavelet transform and compound chaotic system is presented.During the embedding of the watermarking,discrete wavelet transform is done firstly and low frequency part is extracted as the embedding field.Secondly,there is a measure to encrypt the watermark by using the compound chaotic sequence,and then we transform the encrypted part and extract the low frequency.Finally,we embed the low frequency part into the original image.This paper mentions a method to evaluate the algorithm by the similar coefficient NC and peak noise to signal ration PSNR.The experiment result shows that the algorithm can resist JPEG compression,noise attack,filter and so on.The effect of watermark image is quite obvious. |
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| Keywords: | wavelet transform compound chaotic system encrypted watermarking |
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