【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。更多还原

【Abstract】 A dual watermarking algorithm for colored images based on wavelet transform is proposed.The given color image is split into itsthreecomponents in the YIQ color space first,then the luminance component Y is chosen and decomposedby one levelDWT(discrete wavelet transform).Then some of its sub-images are selected to do so to choose the corporate position to embed the watermarks.The-oretical analysis and experiment results show that the watermark generated with the proposed algorithm is imperceptible and of great ro-bustness.更多还原