Description: 提出了一种基于小波域的图像数字水印算法·该算法将相互正交的两种水印(鲁棒水印和参考
水印)同时添加到经过DWT后的载体图像小波系数中,然后用小波反变换得到添加了水印的图像·用提取出
的参考水印来估计图像所受到的攻击,由于提取出的鲁棒水印所受的攻击与参考水印受到的攻击一样,因此
可以估计出原始的鲁棒水印·通过对嵌入水印的图像进行加入噪声、滤波、压缩以及裁剪等大量图像处理等试
验,均能正确检测出水印,表明该算法具有很好的感知效果和鲁棒性
-A wavelet-based image digital watermarking algorithm that the algorithm will be mutually orthogonal two watermarks (watermark robust watermarking and reference) at the same time added to the carrier after image after DWT wavelet coefficients, and then using wavelet transform has been Add a watermark image to use to extract a reference to estimate the watermark image by the attacks, as a result of the robust watermark extracted suffered attacks and the reference watermark by the same attack, it can be estimated through the original Robust Watermarking of the embedded watermark image by adding noise, filtering, compression and cutting, such as a large number of image processing such as testing, can correctly detect the watermark, show that the algorithm has good performance and robustness of perception Platform: |
Size: 190464 |
Author:李倩 |
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Description: 一个用MATLAB实现的DWT数字水印的源程序-One of the DWT using MATLAB realize the source of digital watermarking Platform: |
Size: 2048 |
Author:cheng |
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Description: 基于MATLAB的数字水印的图像实现，采用DWT的频域方法嵌入水印信号-MATLAB-based digital watermarking of images to achieve, using DWT frequency domain methods embed the watermark signal Platform: |
Size: 262144 |
Author:王娜 |
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Description: matlab数字水印程序m文件程序，用的是小波变换中的dwt方法，并且把小波变换分成了四个子带，选择的LL子带。svd算法与dwt相结合，加密方法是混沌加密。与我刚才上传的dwt_svd_GUI.rar是一个程序，一个是gui的，一个是m文件。-m digital watermarking matlab program documentation procedures, using a wavelet transform method in the dwt and the wavelet transform is divided into four sub-band, choose the LL sub-band. svd algorithm with a combination of dwt, encryption method is chaotic encryption. I have just uploaded a dwt_svd_GUI.rar procedures, one is the gui, one m file. Platform: |
Size: 105472 |
Author:xiaobao89 |
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Description: All three, Discrete Wavelet Transform (DWT) - Singular
Value Decomposition (SVD) and Adaptive Tabu Search
(ATS) have been used as mathematical tools for embedding
data into an audio signal. In this paper, we present a new
robust audio watermarking scheme based on DWT-SVD and
ATS. After applying the DWT to the cover audio signal, we
map the DWT coefficients, and apply the SVD, we search for
the optimal intensity of audio watermarking by using the
ATS. Experimental results show that the watermarking
method performs well in both security and robustness to
many digital signals processing, such as filtering,
cropping, mp3 and random noise. Platform: |
Size: 267264 |
Author:Rishi |
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Description: code of digital watermarking using dwt, the original image is get frm the user and then a watermarked image is embedded into the image Platform: |
Size: 361472 |
Author:afifayounus |
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Description: 提出一种基于DWT和DCT域的有意义二值图像数字水印算法 利用Arnold变换对水印序列进行置乱,消除象素的空间相关性,增加水印的安全性 而结合小波波变换和离散余弦变换的特性,将水印信息嵌入到图像变换域的低频和中频系数中,提高水印的鲁棒性和不可见性 实验证明该算法具有较好的抗压缩、抗噪音和抗剪切性。
-Making meaningful binary image digital watermarking algorithm based on DWT and DCT domain using Arnold transform the watermark sequence scrambling, eliminating the spatial correlation of pixel, increasing the security of the watermark and small wave transform and discrete cosine transform characteristics of the watermark information embedded in the low and intermediate frequency of the image transform domain coefficients, improve the watermark robustness and invisibility experiments show that this algorithm has good resistance to compression, anti-noise and shear resistance. Platform: |
Size: 578560 |
Author:apwyhh |
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Description: Digital Watermarking Using Discrete Wavelet Transform (DWT) & Singular Value Decomposition (SVD) & Checking its Robustness in the presence of JPEG Image Compression Platform: |
Size: 4096 |
Author:manjuatha vg |
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Description: 本次研究主要内容是对音频信号进行数字水印加密技术的分析，数字水印技术作为保密技术的一种形式，将具有特殊含义的数据信息嵌入到数字媒体中，以达到对数字媒体进行辨识、标记和版权保护的目的。主要介绍几种水印的嵌入方法：相位法、回声法、时域方法、频域方法、小波域变换等。-Digital audio watermarking is nowadays gaining popularity among the original audio
content producers. It provides a way to the owner to prove ownership by using watermark
which forms integral part of audio. An approach is made in this paper to collectively
introduce applications and techniques up till developed for audio watermarking.The
proposedalgorithm is based on wavelet transform which has efficient computational load and also on cosine transform for increasing the watermark embedding capacity. Keywords: Watermark, audio, DFT, DCT, DWT, and DSSS.
Platform: |
Size: 2048 |
Author:王宇童 |
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Description: 提出一种基于 QR 码的自适应抗打印扫描盲水印算法。方法 首先对载体 QR 码进行三级小
波变换，并对低频部分进行 4×4 分块 Schur 分解，然后利用子块酉矩阵的系数差值的稳定性，将二值
水印信息自适应嵌入到载体 QR 码中，最后对含水印 QR 码打印扫描并提取出水印信息。同时，算法实 现了盲提取。结果 算法能较好抵抗打印扫描攻击，并对高斯噪声、椒盐噪声、斑纹噪声、泊松噪声、
JPEG 压缩等攻击具有较强的鲁棒性。结论 算法具有较强的抗打印扫描性能，可以广泛应用于数字产品
的版权保护。(An adaptive watermark blind watermarking algorithm based on QR codes is proposed. Methods first of all, the carrier QR code is three levels smaller.
Wave transformation and 4 *4 block Schur decomposition of the low frequency part are carried out. Then the binary values are obtained by using the stability of the coefficient difference of the subblock unitary matrix.
The watermark information is embedded into the carrier QR code adaptively. Finally, the watermark information is extracted by scanning the watermark QR code. At the same time, the algorithm achieves blind extraction. Results The algorithm can resist the attack of print and scan, and can resist Gaussian noise, salt and pepper noise, speckle noise, Poisson noise.
JPEG attacks such as compression have strong robustness. Conclusion the algorithm has strong resistance to print scanning and can be widely used in digital products.
Copyright protection.) Platform: |
Size: 4277248 |
Author:macowin |
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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.) Platform: |
Size: 32044032 |
Author:www.wobishe.com |
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