摘要
提出了一种基于小波域的彩色图像双水印算法:把RGB彩色图像转化为YIQ空间模型图像,并提取其亮度分量Y;对亮度分量Y进行一级离散小波变换,对所得到的第一级逼近(LL1)、水平(LH1)和垂直(LV1)细节子图分别进行细化,选取适当的嵌入位置进行双水印的嵌入;对不同类型的水印(二值和灰度)采用不同的嵌入算法。理论分析与仿真结果表明,应用该算法实现的水印具有很好的不可见性和鲁棒性。
A dual watermarking algorithm for colored images based on wavelet transform is proposed. The given color image is split into its three components in the YIQ color space first, then the luminance component Y is chosen and decomposed by one level DWT （discrete wavelet transform）. Then some of its sub-images are selected to do so to choose the corporate position to embed the watermarks. Theoretical analysis and experiment results show that the watermark generated with the proposed algorithm is imperceptible and of great robustness.
出处
《计算机工程与设计》
CSCD
北大核心
2008年第1期31-33,共3页
Computer Engineering and Design
基金
山东省自然科学基金项目(Y2006G20)
关键词
双水印
小波变换
盲检测
块能量
图像置乱
dual watermarking
wavelet tran.sform
blind detection
block energy
image scrambling
