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xbpjepg
- 基于小波变换和混沌映射的多功能图像水印算法，完成的图像数字水印加密-based on wavelet transform and the chaotic map multifunctional image watermarking algorithm to complete the digital watermark image encryption
imagewatermarkcheby
- 调用Cheby 函数产生混沌序列，嵌入水印。嵌入提取过程完整。-Cheby call functions to generate chaotic sequence, embedded watermark. Embedded in a complete extraction process.
hundunjiami
- 本网站上下载的混沌加密的m代码，通过logistic映射生成了混沌序列并调制，实现了对水印信息的预处理。-The website of the chaotic encryption of m code, through the logistic chaotic sequence generated mapping and modulation to achieve a pre-processing of watermark information.
miyao
- 本文提出了基于二维混沌映射的数字图像水印算法，混沌具有随机性、似噪声及对初始条件的极端敏感性等特点。将经过二维混沌映射置乱后的数字水印信号嵌入图像小波域的低频系数，实现了数字水印的隐蔽性、保密性和稳固性；利用二维混沌映射Arnold变换对水印信号进行置乱，不仅增强了水印信号保密性，同时有效提高了视觉上抵抗图像剪切攻击的能力。-In this paper, two-dimensional chaotic map based on digital image watermarking algorit
chaos
- 实现对图像文件的三种变换功能，最主要的是混沌加密功能-To realize three kinds of image file conversion functions, most notably chaotic encryption
medicalimagesROI
- 摘 要: 提出了一种基于医学图像中感兴趣区域(ROI)的盲检测水印算法, 将包含重要病理信息的灰度图像作为数字水印, 经置乱后在混沌序列的控制下嵌入到宿主小波域非感兴趣区域中。实验结果表明, 该算法在保护医学 ROI 的同时提高了水印抗 JPEG 压缩的鲁棒性, 并对篡改、 几何剪切、 滤波等均具有良好的鲁棒性和透明性, 而且混沌序列增强了系统的安全性。-Abstract: This paper presents a region of interest based on medical ima
shuiyinsuanfa
- 笨算法主要是基于混沌序列的图像加密，通过产生随机序列，产生加了水印的图像-Stupid algorithm is mainly based on chaotic sequence encryption, by generating random sequence, resulting in increase of the watermark image
hundunjiami
- 论文的程序，与大家分享 应用混沌序列对水印信息进行置乱源代码 -Thesis process, and application of chaotic sequences to share information on scrambling watermark source code
dwt
- 实现基于小波变换数字水印的嵌入和提取,并实现对压缩，噪声等攻击的检测。-Using the same key after a chaotic sequence of scrambling the watermark information to achieve the double encryption, consider the wavelet energy distribution problem, the watermark information embedded in low-freq
scrambling
- 经过置乱变换的水印再用混沌技术进行加密,在密钥未知的前提下,非授权者无法获取嵌入的数字水印,从而提高了水印系统的安全性-After scrambling transformation chaotic watermarking technology and then encrypted in the key premise of the unknown, unauthorized persons can not obtain the embedded watermark, so as to enh
watermark
- 基于DCT域音频水印完整源代码，包括水印图像的预处理（二维二值图像Arnold变换、混沌加密、降维），水印的嵌入提取以及检测，信噪比和相似性系数。-Based on the the DCT domain audio watermarking complete source code, including the watermark image preprocessing (two-dimensional binary images Arnold transform chaotic encrypt
water
- DFT数字水印的混沌置乱，嵌入水印，检测以及提取-Chaotic scrambling of the DFT digital watermark embedded watermark detection and extraction
DCT
- 基于DCT域的数字水印算法主要包括水印调制、水印嵌入和水印提取，首先在嵌入载体图像之前用Logistic混沌序列对水印进行调制，得到一个只有+1和-1随机序列的水印，同时将载体图像进行全局DCT变换，然后将水印图像嵌入人类视觉系统最重要的部分，即DCT最大的系数，DC（Direct Current）部分也包含在这最大的系数中，这部分的系数满足人类视觉特性，会使水印嵌入的性能更好。嵌入算法是将水印与这些系数进行相乘获得新的系数，再用新的系数来替换原来的系数，即获得嵌入水印后的离散余弦域的图像，然后
Encrypt
- 本文件实现的是对水印的加密及解密，有3种方式，猫脸变换，混沌置乱和zigzag置乱。-The file contains sseveral functions, which can encrypt and decrypt the watermark,including Arnold Transform,chaotic and zigzag.