论文设计了基于控制字的混沌图像加密方法，完善了混沌扰动模型，更好地解决了混沌加密有限精度问题。
A chaotic image encryption method based on control word is designed to improve the chaotic perturbation model and solve the finite precision problem in chaotic encryption.
接着，就混沌理论和混沌加密算法进行研究，对其中的部分算法进行了仿真，通过分析，寻找出现有混沌图像加密算法存在的一些不足。
Then, we study chaos theory and the algorithm, take a part of algorithm for simulation, find out the shortage of images encryption algorithm.
为了对数字水印技术的新需求，我们在本文中提出了一种基于混沌加密的频率域数字图像水印新算法。
In order to satisfy the new requires to digital watermark, we propose a chaotic encrypted image digital watermarking algorithm based on DWT domain in this paper.
如果混沌序列某一比特位为0，则将对应的加密水印信息嵌入到待嵌入图像信息的最低比特位。
When a bit in chao sequences is equal to 0, hiding watermark information of the corresponding bit is embedded into Least Significant Bite.
文章提出了一种新的基于混沌的魔方置乱算法，并将其应用于图像加密。
A new magic cube permutation algorithm based on chaos is presented in this paper for image encryption.
提出了一种基于四值混沌阵列的数字图像加密算法。
This paper presents a digital image encryption algorithm based on four-value chaotic array.
提出了一种基于复合离散混沌系统的对称图像加密算法。
In this paper, a symmetric image encryption scheme based on composite discrete chaotic system is presented.
基于混沌理论，对作为水印的灰度图像进行了加密的处理。
Based on chaos theory, the gray image as watermark is encrypted.
提出了一种在图像小波域中嵌入文字的新型鲁棒水印算法，并对嵌入的文字进行混沌加密和BCH纠错编码。
This paper brings forward a text embedding digital watermarking method based on image's DWT domain, meanwhile, using the chaotic sequences to encrypt the text data and BCH code to correct them.
提出了一种新的基于混沌映射与排序变换的图像加密算法。
Proposed a new algorithm of images scrambling based on the chaotic mapping and sort transformation.
提出一种新的基于混沌有序化映射的数字图像加密方法。
A novel image encryption scheme based on chaos-sorting technique is proposed.
混沌序列具有容易生成，对初始条件和混沌参数敏感等特点，近年来在图像加密领域得到了广泛的应用。
Chaotic sequence can be produced easily and is sensitive of the original conditions and parameters. In recent years, it is widely used in image encryption.
提出了一种基于混沌理论和循环移位的图像加密算法。
A kind of image encryption algorithm is presented based on chaos theory and cycle shift.
图像是否受到篡改，并检测出图像受到篡改的部位。最后论文分析了当前在混沌加密与图像水印研究中存在的问题，并指出了进一步的研究方向。
Finally, the thesis is concluded by pointing out some open issues on the research of chaos based encryption and image watermarking as well as highlight some further research directions.
讨论了一种以实数值混沌序列为基础，利用加密模板矩阵和排序变换，给出一种灰度图像的加密算法。
In this paper, a gray image encryption arithmetic based on chaotic sequences is proposed by taking advantage of the encryption template matrix and sort transformation.
利用参数扰动产生的有限精度混沌序列产生加密矩阵和置乱矩阵，对灰度图像进行加密。
Encryption matrixes and replacement matrixes are being generated by using the chaotic mapping via parameter perturbation, and then the gray-scale image is encrypted.
提出了一种应用级联混沌映射对数字图像进行加密的算法。
In this paper, a new chaotic image encrypting algorithm was proposed based on cascade-chaotic mapping.
根据高维混沌系统具有更高安全性的特点，提出一种基于统一混沌系统和广义猫映射的彩色图像加密新算法。
According to the characteristic of higher secrecy of high-dimension chaotic system, a new colour image encryption algorithm based on unified chaotic system and general cat maps was proposed.
将基于混沌的加密算法应用到数字图像加密中。
Then an encryption algorithm based on chaos has been proposed and a file-encryption system is developed.
利用混沌系统的特点调制了两种不同的混沌序列，分别用于水印加密和子图像的抽取。
Two chaotic sequences are modulated according characters of chaotic system, using for watermark encryption and sub image extraction.
考虑到图像数据量大的特点，传统加密算法无法满足系统要求，我们提出了一种基于混沌序列的图像加密算法。
Considering the characteristic of huge image data, traditional encryption algorithm can't satisfy system's demand, so we bring forward a image encryption algorithm based on chaotic sequences.
本文介绍了混沌加密技术和利用混沌技术进行图像加密的方法，并阐述了图像混沌加密的特点和一些值得进一步研究的问题。
The chaotic image encryption technique is Presented in this paper; some advantages with chaotic technique and some valuable Problems for further research were illustrated.
针对现有基于混沌序列的图像加密算法的缺陷，提出一种基于不放回抽样的图像混沌加密算法。
Aiming at defects which are exiting in image encryption algorithm based on chaotic sequences, this paper proposes an image chaotic encryption algorithm based on sampling without replacement.
本文基于三维整数拟仿射变换和四维混沌系统对图像加密。
In this paper, the symmetric image encryption scheme based on 3-d quasi-affine transformation over limited integer grids and 4-d chaotic map.
混沌流密码加密方案：利用时空混沌系统产生伪随机性能良好的二值序列，并通过了一系列性能检测，实现了对图像和语音文件的流密码加密。
Chaotic stream cipher scheme: good binary sequences are generated using chaotic system, and after performance tests the sequences are applied to encrypt images and speech signals.
在此基础上，利用混沌图像的混沌特性，提出了一种实用的图像加密算法。
And based on those, a practical image encryption algorithm was put forward according to the characteristics of chaotic images.
混沌映射所具有的初值敏感性和随机性，使得基于混沌理论的图像加密算法成为一个研究热点。
The initial sensitivity and randomness of the chaotic map make the image encryption algorithm based on chaotic theory become a hot researching field recently.
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.
基于级联空间混沌系统的选择图像加密算法是在将上述算法结合选择图像加密后提出的。
We combine the above algorithm with selective image encryption and propose a selective image encryption based on couple chaotic systems.
基于级联空间混沌系统的选择图像加密算法是在将上述算法结合选择图像加密后提出的。
We combine the above algorithm with selective image encryption and propose a selective image encryption based on couple chaotic systems.
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