中文摘要：

针对印刷/扫描对图像特征的影响规律,设计了一种基于离散小波变换及奇异值分解的抗印刷/扫描鲁棒性零水印方案,用于印刷品的防伪认证。将彩色图像转换到CIE Lab色彩空间,对亮度分量做一次小波分解,再对其低频子图进行分块奇异值分解,以其最大奇异值矩阵构造零水印。仿真及印刷实验结果表明：该方案具有较好的抗印刷/扫描鲁棒性。

英文摘要：

Aimed at the influencing pattern of printing-scanning on image features, a zero-watermark scheme based on discrete wavelet transform and singular value decomposition was designed. The scheme robustness against printing- scanning could be applied in anti-counterfeiting authentication of packaging printing images. Firstly color images were converted to the Lab color space, then a wavelet decomposition was conducted on luminance component. The low fre- quency sub-graph was divided into non-overlap block, then singular value decomposition （SVD） on every sub-block was constructed. The largest singular value matrix was used to construct zero-watermark. The experimental results of simulation and printing showed that the scheme had good robustness for printing and scanning process.