Description: 对原始信号做DCT的算法：Cox 和Piva 等人提出的DCT技术的经典之作。Cox利用随机数发生器产生标准正态序列作为水印信息对图像进行整体DCT变换后，选取除去DC系数之外部分较低频率系数叠加水印信息 Piva则修改整幅图像的中频部分。对原始信号分块后，再作DCT的算法：Hsu和Wu 把图像进行8*8分块，将一个二进制序列作为水印放入DCT的中频区；有些学者则计算整个图像的DCT，把一个实数序列嵌入DCT的中频系数上。选择中频区的好处是一方面尽量减少嵌入信息对图像主观视觉的影响；同时，尽量避免有损压缩对水印信息可能带来的损失。还有一种DCT方法就是把水印信息嵌入到高频系数上，但是采用这种方法，抗压缩性非常差。-done to the original signal DCT algorithm : Cox Piva and others made the DCT technology classic. Cox using random number generator producing standard normal sequence information as a watermark image of the overall DCT, DC coefficient selection removed outside some lower frequency coefficient superposition watermark information Piva will be replaced by images of the entire IF part. The original signal block, before making the DCT algorithm : Wu Hsu and put images 8* 8 block, a binary sequence as watermarks Add DCT IF; Some scholars calculated whole image of DCT, a real sequence embedded IF DCT coefficients. IF the choice is a good one to minimize the embedded information to the subjective visual images; Meanwhile, try to avoid Compression right watermark information possible losses. There Platform: |
Size: 33792 |
Author:圣子到 |
Hits:
Description: 数字水印的嵌入和检测，dct，
作者Mao Li
Purpose:an algorithm to achieve the embeding watermarking to a image by
dct bloking and hvs,then detect the watermarking by comparability.
-digital watermark embedding and detection, Copy, the writer Mao Li Purpose : an algorithm to achieve the embeding watermark ing to a image by Extra bloking and hvs. then detect the watermarking by comparability . Platform: |
Size: 1024 |
Author:awen |
Hits:
Description: 图像数字水印的方案毕业论文，基于dct和dwt的算法，有详细程序。-digital watermark image of the program thesis, based on Extra dwt and the algorithm, a detailed procedure. Platform: |
Size: 1234944 |
Author:shen |
Hits:
Description: 这是一个完成各种数字图像水印的算法的程序，里面也实现了dct，fft，以及水印的改进算法，程序移植性好-This is a complete range of digital image watermarking algorithm procedure, which also realize the dct, fft, as well as to improve the watermarking algorithm, transplantation procedures and good Platform: |
Size: 53248 |
Author:粘永健 |
Hits:
Description: 这个程序是基于DCT域的数字水印嵌入程序的提取程序，不需要原始图像，就可以从加水印的图像中提取水印图像-This procedure is based on the DCT domain of the digital watermark embedding process of the extraction procedure does not require the original image, you can add a watermark image from the extracted watermark image Platform: |
Size: 128000 |
Author:晁文婷 |
Hits:
Description: 基于DCT域的图像数字水印技术：
摘要：数字水印技术作为数字媒体版权保护的有效办法，近年来在国内外引起了人们极大的兴趣。作者采用了DCT离散余弦变换的算法，对图像这种多媒体数字作品进行了数字水印的嵌入和检测研究。并且使用了高效实用的编程工具MATLAB来介绍了一种DCT域的图像数字水印嵌入和提取的实例，并且在最后对嵌入水印的图像进行了攻击实验，验证了该算法的鲁棒性和不可见性。-Based on the DCT domain image watermarking techniques: Abstract: Digital watermarking of digital media technology as an effective means of copyright protection, in recent years both at home and abroad has aroused great interest. The author adopted the DCT discrete cosine transform algorithms, the image of this multi-media digital works for the digital watermark embedding and detection research. And the use of efficient MATLAB programming tools useful to introduce a DCT domain image watermarking embedding and extraction examples, and in the final of the embedded watermark image of the attack experiments verify the robustness of the algorithm and non- Visibility. Platform: |
Size: 533504 |
Author:绯村剑心 |
Hits:
Description: dct加入图象水印，以matlab打开.m后缀文件即可运行，附有输入图像及输出结果，内有详细注释，非常适合初学水印的同志-DCT image watermarks adding to matlab open. m suffix file to run with the input image and output a result, there are detailed notes, very suitable for beginners watermark comrades Platform: |
Size: 116736 |
Author:无危 |
Hits:
Description: 本程序实现了数字图像水印的DCT变换嵌入算法，是很常见的经典算法！-This procedure achieved a digital image watermark embedding algorithm of DCT transform, is a common classical algorithm! Platform: |
Size: 1024 |
Author:战福瑞 |
Hits:
Description: 由于二维DCT变换是对数字图像矩阵而言的，所以对于RGB位图不能进行DCT变换我在这里先将它转换成灰度图像再把水印嵌入到灰度图像中来进行基于DCT变换的图像水印研究。-As the two-dimensional DCT transform on the digital image matrix is concerned, therefore, for the RGB bitmap should not be DCT Transform I first convert it into gray image and then watermark is embedded into gray-scale images for image based on the DCT Transform watermarking research. Platform: |
Size: 1024 |
Author:chf068 |
Hits:
Description: 基于DCT域的数字图像水印的处理，经测试可以达到对水印检测的功能。这是一个完成各种数字图像水印的算法的程序，里面也实现了dct以及水印的改进算法，程序移植性好 -Based on the DCT-domain watermarking digital image processing, can be achieved by testing the function of the watermark detection. This is a complete range of digital image watermarking algorithm procedure, which also realize the DCT and watermark algorithm transplantation procedures and good Platform: |
Size: 521216 |
Author:xudangshi |
Hits:
Description: 在图像的dct域内嵌入数字水印，包括水印嵌入和提取程序。水印为一副图像。-In the image embedded in the DCT domain of digital watermarking, including the watermark embedding and extraction procedures. Watermark for an image. Platform: |
Size: 1024 |
Author:霞疙瘩228 |
Hits:
Description: 水印提取检测的matlab程序代码
对嵌入水印图像进行dct变化，提取水印序列，计算序列相关值-Detection of watermark extraction matlab code for dct embedded watermark image change, extract the watermark sequence, calculating the value of serial correlation Platform: |
Size: 3072 |
Author:顾利雯 |
Hits:
Description: DCT给灰度图像加二值的水印信息，运行显示四幅图，分别是原图像，水印图像，加水印的图像和提取的水印图像-DCT to gray image plus two watermark values, run the show four maps are the original image, watermark image, add watermark image and extracted watermark image Platform: |
Size: 1024 |
Author:花有缺 |
Hits:
Description: 一个实用的DCT数字图像水印程序，可以直接运行，包括很多攻击类型以及图片-A practical digital image watermark DCT procedure can run, including many types of attacks, as well as pictures Platform: |
Size: 1566720 |
Author:xaoi |
Hits:
Description: 主要研究了彩色图像数字水印算法，在DCT域进行了水印的自适应嵌入和提取，并用Matlab进行了仿真实验，测试算法的性能-The main color image watermarking algorithm in the DCT domain adaptive watermark embedding and extraction, and with the Matlab simulation experiment to test the performance of algorithm Platform: |
Size: 2409472 |
Author:卢雪宁 |
Hits:
Description: 作为信息隐藏的重要分支，数字水印是一种有效的数字产品版权保护和数据安全维护技术。近年来数字水印技术成为了信息安全领域的研究热点，也得到了较大的发展。基于变换域的水印技术是目前研究的热点和重点。本文系统介绍了数字水印的原理和应用方法，概要介绍了数字水印的几种主流算法，并重点研究了一种基于离散余弦变换(DCT)数字图像水印算法，并借助 MATLAB编程工具，实现数字水印的嵌入和提取仿真，以及为测试鲁棒性而对水印图像进行攻击实验。-As an important branch of information hiding, digital watermarking is an effective copyright protection of digital products and data security maintenance technology. In recent years, digital watermarking has become a hot research field of information security, has also been considerable development. Transform domain watermarking technique based on the current research focus and focus. This system describes the principles and applications of digital watermarking methods, an overview of several mainstream digital watermarking algorithms, and focus on a discrete cosine transform (DCT) digital image watermarking, and with the MATLAB programming tools, digital watermark embedding and extraction simulation, as well as test the robustness of the watermark image on the attack experiments. Platform: |
Size: 2048 |
Author:yang cheng |
Hits:
Search - image watermark DCT matlab