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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: 117377 |
Author: zhangfei |
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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: 图像处理中的图像变换的源码与变换后的结果图，包括dct变换，dft变换，w-h变换等-Image Processing Image Transform source and transform the result of plans, including the DCT transform, dft transform, wh transform
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Size: 2068480 |
Author: hs |
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Description: 本代码是基于OFDM系统的一种转换域估计算法，有整个OFDM系统及改进的信道估计算法仿真。包括LS,MMSE,LMMSE,DFT,及改进后的DCT算法。-The code is based on the OFDM system, the conversion of a domain estimation algorithm, the OFDM system and revamp the entire channel estimation algorithm for the simulation. Including the LS, MMSE, LMMSE, DFT, and DCT algorithm improved.
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Size: 239616 |
Author: 赵琪 |
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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: 该gui函数基本上包括图像处理里面的最基本处理，相当于一个小型photoshop。比如读取文件，几何变换中的垂直镜像，平移，旋转，缩放；正交变换的DFT，FFT，DCT，DST，DHT，DWashT；灰度处理中的反色，直方图均衡，全局线性变换，分段线性变换，指数非线性变换，对数非线性变换；图像增强里面的加噪声，平滑，锐化，伪彩色增强；图像分割里面的灰度阈值法，Robert，Laplace，sobel，prewitt，canny算子边缘检测法；图像恢复里面的直接逆滤波，维纳滤波；图像编码里面的霍夫曼编码，行程编码-Basically, the gui functions including the most basic image processing inside the handle, which is equivalent to a small photoshop. For example, read the document, the geometric transformation of the vertical mirroring, shifting, rotating, zooming orthogonal transformation of the DFT, FFT, DCT, DST, DHT, DWashT anti-gray color processing, histogram equalization, global linear transformation , piecewise linear transformation, index of non-linear transform of the number of non-linear transformation image enhancement which increases the noise, smoothing, sharpening, pseudo-color enhancement the gray-scale image segmentation inside the threshold, Robert, Laplace, sobel, prewitt, canny edge detection operator method image restoration inside direct inverse filtering, Wiener filtering image coding inside the Huffman code, and so on Run-Length Coding
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Size: 398336 |
Author: guhuxiang |
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Description: Matlab实现多种水印的嵌入与提取(DFT DCT等)-Matlab to achieve a variety of watermark embedding and extraction (DFT DCT, etc.)
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Size: 154624 |
Author: guojinghua |
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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: 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: 基于VC++的图像的DFT变换和DCT变换，并可实现两者间的对比转换-VC++ based on the image of the DFT transform and DCT transform, and to achieve the contrast between the two conversion
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Size: 245760 |
Author: 姜颖 |
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Description: 实现一个数字信号处理的仿真系统 。具有界面并实现以下功能：能产生（得到）并选择各种数字信号（sin、方波、三角波、语音、噪声及其叠加）；具有DFT和DCT变换功能，对各种信号进行变换；设计滤波器实现低通、高通、带通滤波，得到输出信号的频域特性和时间序列。-the realization of a digital signal processing simulation system. Requires interface and achieve the following functions: to produce (to be) and select a variety of digital signal (sin, square, triangle wave, voice, noise, and overlay)with DFT and DCT features a variety of signals transform Filter Design low pass, high pass, band pass filter, the output signal of the frequency domain to get the features and time series.
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Size: 47104 |
Author: 塞北烽 |
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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: 对图像进行DFT、DCT变换并交换相位和幅度-make DFT and DCT transform to digital image
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Size: 1024 |
Author: 陈琦然 |
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Description: 二维离散傅里叶变换和离散余弦变换同属于图像的二维正交变换，它们在图像处理中有
着极为重要的应用价值。利用这些正交变换可以获得图像的频域信息，从而实现图像的增强、复原、编码和描述。本文将描述对图像进行DFT 和DCT 变换的过程。在进行DFT 变换后，还会将图像的幅频、相频特性进行置换操作后反变换，并探讨其中的规律；而在DCT 变换后，还将探讨如何选取DCT 系数点以实现图像的复原。请先阅读压缩包内的pdf文档。-This code implements the DFT and DCT transformation in image processing, and further discusses the compressing and recovering of the image using hte DFT and DCT transformations. Please read the pdf first.
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Size: 390144 |
Author: Zhang |
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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: execute dft and dct an image
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Size: 54385664 |
Author: ddolddolee
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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: 编程实现二维8*8图像块的DFT，DCT变换
输入一副RGB图像，将其转化为YCbCr颜色空间，然后对Y分量做分块DFT变换，保存为灰度图像，统计计算时间
编程实现8*8块DCT变换,然后分别显示，当使用64个DCT系数里面的一些系数进行重构，比较其质量；同时熟悉采用FFT来实现DCT变换的思想，并显示2维8*8DCT变换的基函数图像(Programming the DFT, DCT transform of two dimensional 8*8 image block
Input a pair of RGB images, transform it into YCbCr color space, then divide the Y component into block DFT transform, save as gray image, and calculate the calculation time
The 8*8 block DCT transform is implemented by programming, and then it is shown that when using some coefficients in 64 DCT coefficients, the quality is reconstructed. Meanwhile, the idea of DCT transformation is familiar with FFT, and the base function image of the 2 dimensional 8*8DCT transform is displayed.)
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Size: 3072 |
Author: 雪鹊
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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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