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Description: 基于DCT,DFT,DWT等的水印算法，还有加置乱的水印算法，用于图像处理方面
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Size: 16539 |
Author: 孔萍萍 |
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Description: 离散余弦变换(DCT for Discrete Cosine Transform)是与傅里叶变换相关的一种变换，它类似于离散傅里叶变换(DFT for Discrete Fourier Transform),但是只使用实数.-discrete cosine transform (DCT for Discrete Cosine Transform ) is associated with the Fourier transform of a transformation, it similar to the discrete Fourier transform (DFT for Discrete Fourier Transfo rm), but only a few use it.
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Size: 301056 |
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Description: 构造一组被噪声污染的方波或三角波数据，试选取适当的FIR滤波器结构和参数，分别应用LMS,DFT/LMS和DCT/LMS算法来实现自适应滤波器，对改组数据进行滤波，并分析仿真结果。-Construction Group was one of the Noise Pollution square or triangular wave data, Examination choose appropriate FIR filter structure and parameters, application LMS, DFT/LMS and DCT/LMS algorithm to achieve adaptive filter, the reorganization data filtering, and analysis of simulation results.
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Size: 116736 |
Author: zhangyun |
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Description: 主要是对图像实现DFT,DCT变换，利用二维小波分析对图像作二层小波分解，显示条状图，十字图及频谱等-Realize the image is mainly DFT, DCT transform, the use of two-dimensional wavelet analysis of images for the second floor of wavelet decomposition, indicating strip maps, charts and cross spectrum
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Size: 3072 |
Author: 袁辉 |
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Description: 基于DCT,DFT,DWT等的水印算法，还有加置乱的水印算法，用于图像处理方面-Based on the DCT, DFT, DWT, such as the watermarking algorithm, as well as increase the watermark scrambling algorithm, for image processing
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Size: 16384 |
Author: 孔萍萍 |
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Description: 频域法加入数字水印的原理是首先将原始信号（语音一维信号、图像二维信号）变换到频域，常用的变换一般有DWT、DCT、DFT、WP和分形。然后，对加入了水印信息的信号进行频域反变换（IDWT、IDCT、DFT、WP），得到含有水印信息的信号。-Frequency-domain digital watermarking method by adding the principle is that first of all, the original signal (voice signal of one-dimensional, two-dimensional image signal) to frequency domain transformation, commonly used in general transform DWT, DCT, DFT, WP and fractal. Then, adding the watermark information signal to the frequency domain inverse transform (IDWT, IDCT, DFT, WP), received signal containing the watermark information.
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Size: 2048 |
Author: laura |
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Description: 对一幅图像进行DCT与DFT变换，分析变换后的高低频分量系数-DCT and DFT on an image, analysis of high frequency components of the transformed coefficient
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Size: 1024 |
Author: lishusheng |
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Description: 用matlab对一张图片进行DFT变换，DCT变换,比较保留20个DCT变换系数重构的图象与原始图像的差别.-Using matlab on a picture to DFT transform, DCT transform, compared to 20 DCT transform coefficients to retain the image reconstruction of the difference between the original image.
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Size: 455680 |
Author: tosh |
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Description: kl变换，dct，dft变换以及信号压缩-kl transform, dct, dft transform and signal compression
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Size: 1024 |
Author: 蒋伟 |
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Description: 对一幅图像进行DCT dft变换后的结果和运行出来的图形-Image on a DCT dft transformed results and running out of graphics
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Size: 4511744 |
Author: 左坚 |
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Description: dct,dft,dht三种图像压缩变换之间的比较-DCT, dft, the dht three kinds of image compression transformation
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Size: 29444096 |
Author: 纪亚萍 |
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Description: this file contains difference between DCT,DWT and DFT
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Size: 14336 |
Author: Sana |
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Description: DFT, FFT,DST, DCT and many
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Size: 270336 |
Author: maja |
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Description: 基于Matlab的压缩感知DCT、DWT、DFT正交基及过完备字典稀疏分解信号及重构-Matlab-based compression perception DCT, DWT, DFT orthogonal basis and complete dictionary signal sparse decomposition and reconstruction
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Size: 3072 |
Author: 李祖团 |
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Description: DFT和DCT在matlab中的一个基本实现(An implementation of DFT and DCT in matlab.)
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Size: 1024 |
Author: Aria丶煙火
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Description: 对图像进行8*8DCT变换后保留前六条对角线上系数并进行反变换。
不使用MATLAB自带工具包进行DFT变换。(8*8 DCT transform of a image)
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Size: 2048 |
Author: 句号大魔王
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Description: 使用matlab对图像进行dct、dft变换（通过原理实现算法）(Using MATLAB to carry out DCT and DFT transform (through principle implementation algorithm))
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Size: 324608 |
Author: Bryinexcitation
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Description: dct dft 功能实现，附实验图片lena.png(dct dft implement with lena.png)
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Size: 226304 |
Author: jaydu1 |
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Description: DCT变换，用于jpeg压缩，选择DCT不选择DFT(DCT transform,For jpeg compression,DCT is not selected for DFT.)
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Size: 15360 |
Author: simbaone |
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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 project is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method contrast digital watermarking system. With GUI interactive interface. There is a main interface GUI, which can call the sub interfaces of DWT method and DCT method. The process includes: reading host image and watermark image, embedding, attacks of various methods (cutting, adding noise, rotation, etc.), extracting. Finally, PSNR peak signal-to-noise ratio is used to evaluate the robustness of different attacks.)
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Size: 10000384 |
Author: MATLAB道长 |
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