一种稳健的可恢复双重数字水印技术

采用自恢复技术和虚拟水印技术等新的技术方法对传统双重数字水印技术的性能进行加强和改进,有效地提高了水印技术的各项性能.文中的自恢复技术利用了双重数字水印所特有的属性,在双重水印中建立函数关系,将两个水印结合在一起,可以在水印受到攻击后对其进行恢复,这很大程度上提高了水印技术的稳健性.虚拟水印是可以在实际只嵌入一重水印的信息量的前提下,实现传统的双重水印技术,改善双重水印技术的不可见性.实验结果表明这一算法对JPEG压缩、添噪、滤波以及多种几何攻击都有很好的稳健性,自恢复实验结果则显示该算法可比同类算法的整体稳健性提高20%.

A Robust, Restorable Dual Watermarking Technology

A robust,restorable dual watermarking technology is proposed in this paper.It adopts two new technology of self-restoring and virtual watermark in dual watermarking technology.The new dual watermarking technology can effectively reinforce the watermark's robustness and improving watermark's transparency in the watermarked images.Self-restoring technology takes advantage of the characteristic of the dual watermarking algorithm to set up a mapping between two watermarks.The mapping enables the self-restoring technology to restore the damaged watermarks.Virtual watermark is a new type of watermark and it isn't embedded in images but can be detected.It can improve watermark's transparency in the watermarked images.