图像水印抗几何攻击研究综述

Survey on Watermarking Against Geometric Attack

稳健性是数字水印技术的一个核心问题.数字水印技术发展到今天,已有大量不同的算法,它们广泛提出了“稳健性”的声明.然而,绝大多数算法所强调的“稳健性”只不过是水印对抗一般信号处理的稳健性,它们不能抵抗甚至是微小的几何攻击.本文分析总结了当前图像水印抗几何攻击的各种方法,提出了下一步可能的发展方向,对改进和设计水印算法具有一定的指导作用.

Robustness is the key issue of digital watermarking technology. Up to now, various watermarking algorithms are proposed with much emphasis on the 'robustness'. However, the 'robustness' claimed in most of algorithms is only against common signal processing operations such as compression and signal filtering. It is now clear that even very small geometric distortions can prevent the detection of a watermark. In this paper the current methods against geometric attacks are analyzed and summarized, and some probable development directions of digital watermarking at next stage are introduced which are the key issues to improve and design watermarking algorithms.