摘要
为提高水印抗打印/扫描的鲁棒性,设计了一种抗打印/扫描的彩色图像零水印方案。采用对宿主图像分层、一次Haar小波分解、分块、提取每块最大奇异值作为图像纹理特征来构造零水印信息,及对印品图像分层、亮度调整、一次Haar小波分解、分块、提取每块最大的奇异值作为印品图像纹理特征来构造零水印信息。然后对比打印/扫描前后零水印信息的相似度,若完全相同,说明此方案抗打印/扫描攻击。试验结果表明,图像打印/扫描前后的零水印信息完全相同,该方案具有理想的抗打印/扫描性能。
A zero-watermarking scheme for color images to resist printing/scanning attack is designed in order to improve watermark robustness to resist printing/scanning attack. After the host images are layered, discomposed by Haar wavelet once and partitioned, the maximum singular value of each block is obtained as an image feature to construct zero- watermarking information. The detection process of watermarking is to layer the printed images, to adjust their brightness, to discompose them by Haar wavelet once, to partition them, and then to extract the maximum singular value of each block as features of printed images to construct zero-watermarking information of the printing/scanning image. The similarities of zero-watermark information before and after printing/scanning are compared. If identical, it indicates that the scheme could resist printing/scanning attack. As the experiment results show, zero watermark information of the host image before and after printing/scanning is identical which indicates the scheme has the ideal performance in resisting printing/scanning attack.
出处
《包装学报》
2014年第3期10-13,共4页
Packaging Journal
基金
国家自然科学基金资助项目(61170101)
关键词
抗打印
扫描攻击
零水印
奇异值
彩色图像
resist the printing/scanning attack
zero-watermarking
singular value
color image
