远程传版系统中没有全面、可靠的技术手段对版面内容进行安全防护,一旦遇到攻击和破坏,信息安全将没有保障。数字水印是一种重要的保护图像完整性的方法。从报业的出版流程出发,实验和探讨了基于奇异值分解和基于可逆整数变换的两种数字水印算法在报业系统中的应用,实验证明,前者能够在远程传版系统中得到应用而后者不能适应远程传版系统环境。
Remote transmission systems are not safe and reliable enough to protect their contents in case they are attacked, thus information security could not be guaranteed. Digital watermark is a major way to protect integrity of images. This paper, from the publishing process of newspaper trade, analyzes the availability of watermarks based on Singular Value Decomposition and Reversible Integer Transform respectively. The experiments show that the former can be used in the remote transmission system while the later could not adapt to the system.