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Description: DCT数字水印算法，我的毕业设计内容，希望大家能够喜欢-DCT digital watermarking algorithm, the contents of my graduation project, hope that we can enjoy
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Author: 马飞 |
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Description: 本文设计基于DCT的人脸识别系统，首先结合当今人脸识别的背景和发展状况讨论了人脸识别的研究内容及在各方面的应用；然后研究了人脸识别进行预处理，讨论了人脸识别预处理的其他方法，分析各种方法的利弊，最后采用DCT（离散余弦变换）实现人脸图像预处理中的降维处理；接下来对人脸图像的特征提取进行了研究，简单叙述了几何特征提取和代数特征提取，同时深入研究了基于DCT和PCA变换的人脸图像特征提取，从而实现是否对人脸识别系统识别率有所提高的研究；对于分类器的选择，本文对两种分类器进行了探讨，即最近邻分类器和BP神经网络分类器，同时采用BP神经网络分类器作为本次基于DCT的人脸识别系统设计的分类器，并对BP神经网络进行分类的算法进行设计，BP神经网络具有学习功能，只要采用本系统对训练图片进行训练，就可以记下图像的相关信息，对于测试图片，就可以很准确的识别出该图片是属于哪个的。最后，本文对整个人脸识别系统设计实验进行了实验分析，实验结果表明本文采用的方法切实有效。- This is the design of the DCT-based face recognition systems. First of all, the background light of the current face recognition and face recognition to discuss the development of research in all aspects of content and applications And then studied the pretreatment of face recognition to discuss the pre-treatment of other face recognition methods,and analysis of the pros and cons of various methods, finally, the use of DCT (discrete cosine transform) image pre-processing to achieve in the face of the reduced-order processing Next on the face image feature extraction have been studied, A brief description of the feature extraction and algebraic geometry feature extraction, while in-depth study based on the DCT and the PCA Transform face image feature extraction in order to achieve face recognition system to identify whether the rate of increase in the research For the choice of classifier, this paper carried out on two of classifier, that is, nearest neighbor classifier and BP neura
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Author: 刘文珍 |
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Author: 邓云鹏 |
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Description: 这是一个matlab环境下的离散余弦变换的程序，与matlab的dct程序运行结果一样-This is a matlab environment, discrete cosine transform process, and matlab s dct program runs the same result as
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Author: zhouzixuan |
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Description: 数字水印提取算法，利用离散余弦变换的（dct）算法，对以往的算法有所改进-Digital watermark extraction algorithm using discrete cosine transform (dct) algorithm, an improvement on previous algorithms
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Size: 1024 |
Author: 肖乐 |
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Description: extract file
and the working is to get dct matrix of 256*256 image which is divide into each 8*8 image block
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Size: 1024 |
Author: sudhir kumar |
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Description: 将图象分块(8*8)，作DCT变换，并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码，IDCT用来解压缩。-The image sub-block (8* 8) for the DCT transform, and to make IDCT: DCT is a separable image transformations, is used to image compression coding, IDCT is used to decompress.
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Size: 7168 |
Author: zy |
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Description: 关于图像除了 的 水印算法 dct
很详细 很难下载的 一篇详细论文-In addition to the watermarking algorithm on the image detail dct difficult to download a detailed paper
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Size: 287744 |
Author: 李小伟 |
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Description: dct-svd域水印算法,实现数字水印图像在载体DCT-SVD域的隐藏-a kind of watermarking algorithm in DCT-SVD domain
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Size: 1024 |
Author: 云新 |
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Description: DCT域图像水印嵌入对策和算法，黄继武，程卫东，电子学报-DCT domain image watermarking strategies and algorithms, HUANG Ji-Wu, Cheng Weidong, e-Journal
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Size: 363520 |
Author: gm |
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Description: 适用于图像压缩的二维8×+8+DCT查表快速算法研究，纪绣花，张彩明-Applicable to two-dimensional image compression 8 ×+8+ DCT fast algorithm for look-up table, Ji embroidery, Cai-Ming Zhang
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Size: 632832 |
Author: gm |
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Description: 基于dct变换的水印算法，并进行有损压缩情形下的水印嵌入和提取-Dct transform based watermarking algorithm, and for lossy compression case the watermark embedding and extracting
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Size: 1024 |
Author: 方磊 |
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Description: 基于DCT变换的信息隐藏(数字水印)嵌入算法的设计(Matlab-DCT-based information hiding (digital watermark) embedded in the design of algorithms (Matlab
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Size: 4096 |
Author: 王锴 |
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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
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Size: 1566720 |
Author: xaoi |
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Description: 一种基于DCT域的全盲数字水印，文章下载于IEEE XPLORE-Based DCT domain blind watermarking, the paper available on the IEEE XPLORE
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Author: lifeng |
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Description: 第2章 信号变换 67
2.1 Z变换及MATLAB实现 67
2.1.1 Z变换的定义 68
2.1.2 Z变换的收敛域 68
2.1.3 Z逆变换 70
2.1.4 Z变换的性质 72
2.1.5 Z变换的工程应用 74
2.2 Chirp Z变换及MATLAB实现 77
2.2.1 Chirp Z变换的定义 77
2.2.2 Chirp Z变换的计算方法 79
2.2.3 Chirp Z变换的MATLAB实现 80
2.3 离散傅里叶变换及MATLAB实现 82
2.3.1 离散傅里叶变换定义 82
2.3.2 离散傅里叶变换的MATLAB实现 84
2.3.3 离散傅里叶变换性质 86
2.3.4 离散傅里叶变换的FFT算法 95
2.3.5 离散傅里叶变换FFT算法的应用 98
2.4 DCT变换及MATLAB实现 99
2.4.1 DCT变换的定义 100
2.4.2 DCT变换的MATLAB实现 101
2.5 Hilbert变换及MATLAB实现 103
2.5.1 Hilbert变换的定义 103
2.5.2 Hilbert变换的MATLAB实现 104
2.5.3 Hilbert变换的性质 105-Chapter 2, the signal transform 67
2.1 Z transform, and MATLAB to achieve 67
2.1.1 Z transform definition 68
2.1.2 Z transform domain of convergence 68
2.1.3 Z inverse transform 70
2.1.4 Z transform the nature of the 72
2.1.5 Z 74 Transform Application
2.2 Chirp Z transform, and MATLAB to achieve 77
2.2.1 Chirp Z transform definition 77
2.2.2 Chirp Z transform method 79
2.2.3 Chirp Z Transform MATLAB to achieve 80
2.3 Discrete Fourier Transform and MATLAB to achieve 82
82 2.3.1 Definition of Discrete Fourier Transform
2.3.2 MATLAB Implementation of Discrete Fourier Transform 84
2.3.3 Discrete Fourier transform 86
2.3.4 Discrete Fourier Transform FFT algorithm 95
2.3.5 Discrete Fourier Transform FFT algorithms in the 98
2.4 DCT transform, and MATLAB to achieve 99
2.4.1 DCT transform definition 100
2.4.2 DCT Transform MATLAB Implementation 101
2.5 Hilbert Transform and MATLAB Implementation 103
2.5.1 Hilbert transform definition 103
2.5.2 Hilbert Transform MATLAB Im
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Size: 7168 |
Author: Lily |
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Description: DCT域数字水印嵌入算法MATLAB实现-DCT domain watermarking algorithm MATLAB Implementation
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Size: 99328 |
Author: bai |
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Description: 在一个图像块中调整两个(或多个) DCT系数的相对大小。将描述一个使用数字图像作为载体的系统。在编码处理中，发送者将载体图像分成8×8的像素块，每一块只精确地编码一个秘密信息位。嵌入过程开始时，首先伪随机地选择一个图像块bi，用它对第i个消息比特进行编码。令Bi=D{bi}为DCT变换后的图像块。
在通信开始前，发送者和接收者必须对嵌入过程中使用的两个DCT系数的位置达成一致，让我们用(u1,v1)和(u2,v2)来表示这两个索引。这两个系数应该相应于余弦变换的中频，确保信息保存在信号的重要部位(从而使嵌入信息不容易因JPEG压缩而完全丢失
-abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwx
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Size: 1526784 |
Author: ljh |
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Description: DCT图像压缩算法。1.图象进行归一化 2.显示系数图象 3.重构及显示图象 4.显示误差图象 5.计算归一化图象的均方误差 -DCT image compression algorithm. 1. Images were normalized 2. Shows coefficient image 3. Reconstruction and display of images 4. Show the error images 5. Calculated normalized mean square error of image
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Size: 1024 |
Author: wjs |
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Description: 利用matlab实现基于DCT变换的变焦距图像融合-Using matlab to achieve DCT-based image fusion Zoom
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Author: han |
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