| 基于HSI模型的彩色图像数字水印 |
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| 引用本文： | 张力支,周激流,杨柱中,何坤. 基于HSI模型的彩色图像数字水印[J]. 四川大学学报(自然科学版), 2008, 45(1): 76-80 |
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| 作者姓名： | 张力支 周激流 杨柱中 何坤 |
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| 作者单位： | 1. 四川大学电子信息学院,成都,610064
2. 四川大学计算机学院(软件学院),成都,610064 |
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| 摘 要： | 本文提出一种基于HSI彩色模型空间的数字图像水印算法，将RGB存储格式的原始图像转换到HSI空间，并对其中饱和度分量进行分块小波变换；然后在随机选出子块的HH子带系数中嵌入水印信息，利用纹理信息控制水印嵌入强度；最后将经过小波逆变换后的图象重新返回RGB颜色空间.较传统方法，本文方法能够有效克服图像亮度变化对水印信息提取效果的影响，既满足水印图像的不可见性要求，同时又具有较强的鲁棒性.
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| 关 键 词： | 数字水印；HSI颜色空间；小波变换；嵌入强度；人类视觉感知 |
| 文章编号： | 0490-6756（2008）01-0076-05 |
| 收稿时间： | 2007-01-22 |
| 修稿时间： | 2007-01-22 |
Color image watermarking based on HSI space |
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| ZHANG Li-Zhi,ZHOU Ji-Liu,YANG Zhu-Zhong,HE Kun. Color image watermarking based on HSI space[J]. Journal of Sichuan University (Natural Science Edition), 2008, 45(1): 76-80 |
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| Authors: | ZHANG Li-Zhi ZHOU Ji-Liu YANG Zhu-Zhong HE Kun |
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| Affiliation: | College of Electronics and Information, Sichuan University;College of Computer(Software), Sichuan University;College of Electronics and Information, Sichuan University;College of Computer(Software), Sichuan University |
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| Abstract: | A new HSI space based method of colour image watermarking is proposed in this paper. Firstly Original image is transformed from RGB space to HSI space. By using 8×8 blocks wavelet transform, watermark is embedded in saturation (S) coefficients of HH sub-band. The embeding intensity is controled by the edge and texture information of the original image. Then using the wavelet inversetransform changing HSI space back into RGB space. Experimental results show that the watermarked image is imperceptible and robust to commonly watermark attack or image processing. Moreover, this method has excellent performance for image whose chroma information is acutely changed. |
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| Keywords: | watermarking HSI space wavelet transform embeding intensity human vision apperception |
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