摘要
随着信息技术和数码图像复制设备的飞速发展,纸介质文档中的信息安全面临很大的挑战,如何解决纸介质文档中的信息安全问题已成为众多学者关注的研究课题之一。本研究提出一种基于网点调制底纹的纸质印刷文档中信息隐藏的新方法,该底纹由大量随机排列的印刷网点构成,包括编码点、定位点以及视觉干扰点。通过编码点特定位置的偏移来隐藏信息,采用定位点来探测编码块和相邻编码点偏移前的初始位置,同时通过干扰点的随机扰动保证隐藏信息的安全性和视觉隐蔽性。实验结果表明,利用此方法设计出的网点调制底纹隐藏的信息量大,并且对打印扫描攻击具有较强的鲁棒性。该技术可广泛用于防伪印刷、防复印、文档内容防篡改以及文档图像检索等应用领域。
With the rapid development of the information technology and digital image copy devices, the paper media still plays an important role in many areas and correspondingly the information security of paper media documents are facing great challenges. So how to solve the information security problems of paper media has become one of the hottest research topic. In this study, an information hiding method used in printed documents image was proposed based on the modulating shade composed of a large number of randomly arranged screen dots. These dots included the coding dots, anchoring dots and perturbing dots. Experimental results showed that with the new method, screen dots modulating shade has larger information capacity and also has more strong robustness against the attacks of printing and scanning processes. Moreover, this technology also can be widely used in many other areas, such as anti - counterfeit printing, anti - copy, document content tamper- proofing and document image retrieval, etc.
出处
《中国印刷与包装研究》
CAS
2013年第2期30-34,共5页
China Printing Materials Market
关键词
防伪印刷
信息隐藏
网点调制
Anti -counterfeit printing
Information hiding
Screen dots modulating
