第四章介绍了水印的纠错编码和随机置乱技术。
In chapter four, I introduced the technology of ECC and random permutation.
实验结果表明，置乱技术在抵抗剪切攻击方面非常有效。
This experimental result indicate that these techniques are very effective in keeping resilience to cropping attack.
实验结果表明，置乱技术在抵抗剪切攻击方面是非常有效的。
Experimental results indicate that these techniques are very effective in keeping resilience to cropping attack.
以密码学中的公钥思想为基础，提出了一种基于原根的数字图像置乱技术。
Based on the ideas of public key cryptography, a new scrambling technology of digital image based on primitive roots is given.
该算法结合了图像置乱技术和改进的LS B嵌入方案，对嵌入的数据形成了双层保护。
The presented steganography approach combines image scrambling technology and modified LSB embedding and provides double protection for the embedded message.
本文概括地介绍了数字水印技术的概念及原理，并利用数字图像置乱技术，给出了一种脆弱数字水印技术。
The concepts and theory about digital watermark are introduced in this paper. A kind of fragile watermark technology is given by means of digital image scrambling technology.
为此，本文应用一种改进的水印预处理技术，将混沌序列和图像置乱技术结合起来对灰度水印图像进行加密。
Therefore, this paper applied an improved watermark preprocessing technologies, the chaos theory and image scrambling technology combine encrypt of watermark image.
为提高数字水印技术的安全性，比较研究了几种常见的图像置乱技术各自的特点以及如何用MATLAB工具编程实现。
To improve the security of digital watermarking technology, compared and studied several familiar Image Shuffle technology, used MATLAB tool to realize it.
本论文在信息隐藏方面的主要工作就是围绕这两种应用展开的，内容涉及图像置乱、图像信息隐藏和隐藏分析和攻击技术等方面。
In this dissertation, we study the technologies and application of these two situations, our attentions focused on image scramble, image hiding, hiding analysis and attack.
研究了基于宏块置乱的视频数据加密技术。
This paper presents a video encryption approach by MacroBlock permutation.
传统的混沌水印置乱方案存在的两类不足：抗混沌预测技术的能力和有限字长效应的影响。
The traditional chaotic watermark scrambling method has two weak points: the ability of anti-forecast technology and the influence of word length.
方案一，利用ICA技术提取连续帧的静态分量和动态分量，在动态分量上嵌入置乱水印。
The first scheme: In the video domain, ICA is used to extract dynamic component and static component of the consecutive frames, the watermark is embeded into the dynamic one.
方案一，利用ICA技术提取连续帧的静态分量和动态分量，在动态分量上嵌入置乱水印。
The first scheme: In the video domain, ICA is used to extract dynamic component and static component of the consecutive frames, the watermark is embeded into the dynamic one.
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