Description: 对比dct和dwt在图像数字水印应用中的特点，分析其特性。-contrast Extra dwt and the application of digital watermarking images of features, analysis of their identity. Platform: |
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Author:袭乐宣 |
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Description: 一个用DCT的数字水印毕业论文。本文重点研究了基于DCT的低频水印算法、基于DCT的中频水印算法和基于DCT的自适应视频水印方案。-DCT with a digital watermark dissertation. This paper focuses on the low-frequency DCT-based watermarking algorithm, IF DCT-based watermarking algorithms and DCT-based Adaptive Video Watermarking program. Platform: |
Size: 164864 |
Author:1111111 |
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Description: :数字水印技术在数字产品的版权保护中起着非常重要的作用。概括了数字水印技术的现状及其基本原理,并
分析了变换域数字水印算法的优势,详细阐述了DCT 水印嵌入和提取算法的原理和步骤。最后在Matlab 平台下对DCT 数
字水印算法进行了仿真,仿真结果证实了DCT 算法的强健性和鲁棒性。-: digital watermarking technology in the digital copyright protection products played a very important role. Summarized the digital watermarking technology and the status of the basic principles and transform domain analysis of digital watermarking algorithm advantages, elaborate on the DCT watermark embedding and extraction algorithm theory and steps. Finally in Matlab platform for DCT digital watermarking algorithm for the simulation, Simulation results confirmed the DCT are strong and robust. Platform: |
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Author:my name |
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Description: 数字水印技术近年来得到了较大的发展,基于变换域的水印技术是目前研究的热点。该文提出了一种基于DCT域的自适应水印算法。实验结果表明,这种算法具有良好的性能,实现的水印具有不可见性,而且具有较好的鲁棒性。
-digital watermarking technology in recent years has been substantial development, based on the transform domain watermarking technology is a hot topic at present. The paper presents a DCT-based Adaptive watermarking algorithm. Experimental results show that the algorithm has good performance, the watermark is invisible, but also better robustness. Platform: |
Size: 663552 |
Author:my name |
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Description: 一个基于dct变换的数字水印算法的源程序,可供进行数字水印学习和研究的学生及科研工作者学习参考-DCT-based digital watermarking algorithm transform the source code, available for study and research of digital watermarking students and researchers to study the reference Platform: |
Size: 191488 |
Author:王晓华 |
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Description: dct and idct for image.matlab实现信息序列的嵌入和提取-dct and idct for image.matlab realize embedded information and extract sequence Platform: |
Size: 2048 |
Author:wubaishan |
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Description: 多种基于DCT变换域水印方法实现论文。对于数字水印初学者是很好的基础文案。-A variety of DCT-based transform domain watermarking method papers. Digital Watermarking for beginners is a good basis for the Record. Platform: |
Size: 2907136 |
Author:james |
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Description: 一个mpg压缩的水印提取程序,考虑到了几种压缩格式,并基于此提出DCT频率域上的水印提取.对学习视频水印的人有help-Mpg compressed a watermark extraction procedure, taking into account several types of compression formats, and based on this proposed DCT frequency domain watermark extraction. For learning video watermarking help people Platform: |
Size: 1024 |
Author:zzy |
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Description: 三维DCT变换是在空间信息上增加了一维的时间维度，对视频系列直接进行压缩-Three-dimensional DCT transform information in the space are added to one-dimensional time dimensions of the video series for direct compression Platform: |
Size: 14336 |
Author:farmer |
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Description: 已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由此分析直流和低频系数的重要性。
-Known brightness of two different image data block is as follows: (1) Principles of analysis of DCT, the DCT method, program and calculate the corresponding DCT coefficient, analysis of distribution coefficients. (2) quantitative analysis based on visual characteristics of the distribution of long-form features step-by-step to complete the DCT coefficient quantization. (3) the use of Z-scan output data to achieve statistical encoding, the formation of Video stream. (4) the use of the reconstructed image brightness IDCT data to calculate the SAD size, analysis of the causes of errors and the use of DCT for the principle of data compression. () (5), respectively, a factor of 1,3,6 using the upper left corner of the reconstruction of images, calculating the corresponding SAD, and the resulting analysis of DC and the importance of low-frequency coefficients. Platform: |
Size: 1024 |
Author:张元 |
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Description: 本文提出一种在原始视频DCT(离散余弦变换)与SVD(奇异值分解)域自适应嵌入水印的算法。算法首先将视频流分割成一个个场景,场景中的视频图像被变换到DCT-SVD域中,水印量化嵌入在最大奇异上,实现了水印盲检测。同时实验证明该算法在满足透明性要求下也满足一定的鲁棒性要求,能够抵抗低通滤波、中值滤波、椒盐噪声、高斯噪声、H.264压缩攻击以及统计攻击和帧剪切等攻击。-This paper presents an original video in the DCT (Discrete Cosine Transform) and SVD (singular value decomposition) algorithm for adaptive watermark embedding. Firstly, a video stream is divided into scenes, scenes of the video image is converted to the DCT-SVD domain, the watermark embedded in the largest singular quantification, the realization of the watermark signal. Furthermore, the experiments show that the algorithm meet the transparency requirements are met under certain robustness requirements, can resist the low-pass filtering, median filtering, salt and pepper noise, Gaussian noise, H.264 compression attacks and attacks and frame shear statistics attack. Platform: |
Size: 63488 |
Author:久久 |
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Description: 实现对视频图像的游程编码和解码。过程包括：二维DCT变换、量化及游程编码。
一般来讲对于视频的I帧进行恢复，其信噪比可达到38DB以上。-Implementation of the video image encoding and decoding run-length. Process includes: two-dimensional DCT transform, quantization and run-length encoding. In general, I frame for the video resume, the signal to noise ratio can reach more than 38DB. Platform: |
Size: 7168 |
Author:zrs |
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Description: video watermarking based on dct, svd, LSB and wavelet all works good use vipmen video in matlab Platform: |
Size: 1180672 |
Author:satguru |
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Description: H.264视频编码标准中的DCT变化与量化步骤。-H.264 video coding standard changes in the DCT and quantization steps. Platform: |
Size: 1024 |
Author:jason |
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Description: 首先将YUV格式的视频转换为MAtlab适用的格式，通过主要采用DCT变换的方式，实现视频水印的嵌入。-First, the YUV format video conversion MAtlab for the format, mainly DCT transform by way of video watermark embedding. Platform: |
Size: 1024 |
Author:飘飞 |
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Description: 基于matlab平台，通过DCT算法来对视频进行压缩。代码包括视频分解成帧，DCT算法压缩，帧合成视频，以及综合的视频压缩M文件，可以直接仿真。有相应的图片，以及压缩前后的视频，还有原理word报告。-Based on matlab platform, through DCT algorithm to compress the video. Code includes video decomposition framing, DCT compression algorithm, frame composite video, and integrated video compression M files can be directly simulated. Corresponding images, and compressed video before and after, as well as the principle of word report. Platform: |
Size: 11201536 |
Author:魏路 |
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