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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。
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Author: 绯村剑心 |
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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！
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Size: 1747 |
Author: 战福瑞 |
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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
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Author: 圣子到 |
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Description: 水印DCT变换嵌入
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Size: 2673 |
Author: wyy031980 |
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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
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Size: 33792 |
Author: 圣子到 |
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Description: 用matlab实现的有一个数字水印程序，它也是基于dct算法的数字水印程序，对一副图像进行dct变换然后嵌入水印-using Matlab is a realization of the digital watermarking procedure, which is based on the A1501 digital watermarking algorithm procedures, a pair of images Extra Transform then embedded watermark
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Author: syn |
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Description: 一种基于视觉模型的DCT数字水印算法
提出了一种水印系统与人眼视觉模型相结合的离散余弦变换数字水印算法。该算法利用了人眼视觉模型
(Hvs)来选取水印嵌入区域，使其既能够保证水印信息的鲁棒性又能够满足其不可见性。利用基于能量关系的算法进
行水印嵌入。最后进行了仿真实验，嵌入水印的图像中很难发现水印的痕迹，具有较高的清晰度。-based on the visual model DCT digital watermarking algorithm presents a watermarking system and the human visual model Guitar with the discrete cosine transform digital watermarking algorithm. The algorithm uses the human visual model (Hvs) to select embedding region, it is to ensure watermark robustness is not able to meet its visibility. Based on the energy use of the embedded watermark algorithm. Finally, the simulation experiments, the embedded watermark image watermark is difficult to find traces of high clarity.
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Author: ghostsx |
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Description: ％基于DCT的水印算法
％数字水印处理系统主要由水印嵌入和水印检测两个过程。
％水印嵌入过程为：数字水印（X）、原图像（I）和密钥/公钥（K）通过数字水印嵌入算法形成嵌入水印后的图像（I*）。
％水印检测过程为：数字水印（X）、水印图像（I*）和密钥/公钥（K）通过数字水印检测算法检测出数字水印或有无水印。
％基于DCT变换的水印算法：将一个随机序列作为水印信号嵌入到图像DCT变换重要分量的幅度成分中（幅值较大的n个系数作为重要分量）。
％定义一个相似函数来检验水印提取是否成功。试验结果表明，该算法具有不可见性，对通常的图像处理，如剪切、缩放、中值滤波、压缩等
％以及噪声干扰都具有一定的鲁棒性。-err
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Author: 王寒涛 |
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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.
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Size: 533504 |
Author: 绯村剑心 |
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Description: 一种基于DCT变换的数字水印算法的实现过程,水印为伪随机序列，包括嵌入和提取两个过程。其中textmark.m为攻击实验代码。-DCT-based Digital Watermarking Algorithm Transform realize the process, the watermark for the pseudo-random sequence, including both the process of embedding and extraction. Textmark.m experiment in which the attack code.
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Size: 2048 |
Author: 陈日进 |
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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!
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Size: 1024 |
Author: 战福瑞 |
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Description: 自适应二维数字水印系统随着因特网和数字技术的发展，数字媒体已成为人们获取知识的主要手段，但这也带来了一系列问题：如作品侵权、非法复制和传播等。而数字水印技术作为版权保护的重要手段，已得到广泛的研究和应用。本文提出了一种以灰度图象为水印的空域二维自适应数字水印算法。为实现水印图象的叠加，我们首先将其进行8 8分块并进行DCT变换，然后对每块的DCT系数进行量化和调整，最后，取出每块的部分DCT系数构成水印信号。为了实现自适应，首先将载体图象按8 8分块并利用视觉掩蔽特性对载体图象象素进行分类，根据块分类结果，水印信号以不同强度嵌入到载体图象中。实验结果表明，我们提出的算法具有较好的鲁棒性。最后本文对该技术今后的研究指出了一些可能的方向。
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Author: jl |
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Description: VC实现数字水印的嵌入和提取算法 二值图像嵌入灰度图像的DCT变换系数中-VC realize digital watermark embedding and extraction algorithm for binary image embedding grayscale images in the DCT transform coefficients
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Author: fish |
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Description: VC实现水印的嵌入和提取的全套算法 DCT变化域嵌入、提取 Torus变换对水印处理-VC realize watermark embedding and extraction algorithm of the full set of changes in DCT domain embedding, watermark extraction Torus transform treatment
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Author: fish |
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Description: dct(离散余弦变换）域数字水印嵌入算法-dct (discrete cosine transform) domain digital watermarking algorithm
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Author: mynaw |
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Description: 数字水印嵌入算法，利用离散余弦变换的（dct）算法-Digital watermark embedding algorithm, using discrete cosine transform (dct) algorithm
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Author: 肖乐 |
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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!
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Size: 2048 |
Author: produ |
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Description: 在彩色图像中嵌入二值灰度水印。有两种算法，第一种嵌入在yuv模型的y层整体系数上，第二种嵌入在rgb模型r层直流系数上。本科毕设题目，希望可以帮到你。(Two valued gray watermark is embedded in color image. There are two algorithms. The first one is embedded in the overall coefficients of the Y layer in the YUV model, and the second one is embedded in the DC coefficients of the R layer of the RGB model. Undergraduate course set up topics, I hope I can help you.)
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Author: 反倒是打发斯
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Description: DCT变换实现图像压缩及嵌入水印等,内含测试文件及DCT算法讲解(Image compression and embedding watermark by DCT transform)
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Author: 和悦 |
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Description: 本课题为基于MATLAB的小波变换dwt和离散余弦dct的多方法对比数字水印系统。带GUI交互界面。有一个主界面GUI，可以调用dwt方法的子界面和dct方法的子界面。流程包括，读取宿主图像和水印图像，嵌入，多种方法的攻击（剪切，加噪，旋转等），提取，最后利用psnr峰值信噪比进行评价不同攻击下，鲁棒性的好坏。(This topic is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method comparison digital watermarking system. With GUI interface. There is a main interface GUI, which can call the sub interface of DWT method and DCT method. The process includes: reading host image and watermark image, embedding, attack of various methods (cutting, adding noise, rotation, etc.), extracting, and finally evaluating the robustness of different attacks by using PSNR peak signal-to-noise ratio.)
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Author: www.wobishe.com |
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