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Description: 以面向对象方法实现的数值算法类库，包括 向量、矩阵等的运算以及FFT-object-oriented methods to achieve the numerical algorithm library, including vector, matrix arithmetic and FFT
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Description: 一个二维Fourier变换的程序 适用于256*256的点阵，用于应付一般的数字图像处理需要-a two-dimensional Fourier transform procedures apply to the 256* 256 dot matrix, used to meet the general needs of digital image processing
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Size: 7168 |
Author: 李子刚 |
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Description: 关于二维小波变换的程序 [精华]
说明：此算法重在概念，速度并不是很快。因为FOR循环的缘故。此程序从循环矩阵的观点出发，把圆周卷积和快速幅里叶变换建立了联系。实现了分解和无失真重构。它只做了一层分解，即将256x256图形分解成为64x64的四个图形，避免了使用WKEEP()的困惑。主要思想为用小波滤波器族构造正交阵W,变换写为B=W*A*W ,反变换为：A=W *A*W,这与所有正交变换无异。W为循环正交矩阵，因此可用FFT实现快速运算，难点就在重构矩阵上。若用矩阵概念明确，一个共扼转置可以搞顶。但FFT的使用必须找到与分解序列的关系。-on Wavelet Transform procedures [best] Note : This algorithm important concept is not speed quickly. Because FOR cycle nowadays. This program cycle from the point of view of Matrix, circular convolution and fast Fourier transform is established links. To achieve the decomposition and reconstruction without distortion. It only had one decomposition, 256x256 graphics will be 64x64 decomposition of the four graphics, avoiding the use of WKEEP () confusion. The main idea of using wavelet filter generator orthogonal array W, write to transform B = W* A* W, anti-Transform : A = W* A* W, which is orthogonal transformation all the same. W cycle orthogonal matrix, can be used to achieve rapid FFT computation, on the difficult reconstruction matrix. If a clear matrix concept, a home to a total o
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Size: 3072 |
Author: 罗松溪 |
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Description: matlab6矩阵微分工具 -matlab6 matrix differential tools matlab6 differential matrix-matrix tools matlab6 tools matlab6 points differential matrix tools
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Size: 543744 |
Author: 刘志刚 |
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Description: 此代码作为图像处理中进行ＦＦＴ变换，该代码进行128*128，256*256，512*512矩阵的图像变换。-such as image processing code for FFT transform, the code 128* 128. 256* 256* 512 matrix of image transformation.
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Size: 4096 |
Author: 刘磊 |
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Description: 1.图像频域处理正交变换的matlab实例
2.含有的频域变换内容如下：
正交变换通用算子
傅立叶变换
傅立叶变换的原理
傅立叶性质
二维离散傅立叶变换（ 2DDFT ）
快速傅立叶变换（ FFT ）
傅立叶变换的研究与应用
离散余弦变换
DCT 变换矩阵
dct2 函数和 dctmtx 函数
Walsh- Hadamard 变换
Radon 变换 -1. Image processing orthogonal frequency-domain transform Matlab two examples. Containing the frequency domain transform as follows : orthogonal transformation generic operator Fourier transform theory of Fourier transform two-dimensional Fourier nature of discrete Fourier transform (2DDF T) Fast Fourier Transform (FFT) of the Fourier transform and discrete cosine transform matrix dc t2 function and the function dctmtx Walsh-Hadamard transform Radon transform
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Size: 5120 |
Author: 方周 |
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Description: java程序包，用于矩阵运算，特征值分解，FFT-java package for the matrix, eigenvalue decomposition, FFT, etc.
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Size: 26624 |
Author: 张天 |
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Description: fortran CG-FFT程序
Conjugate gradient package for solving complex matrix equations
-fortran CG-FFT procedures Conjugate gradient pack age for solving complex matrix equations
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Size: 21504 |
Author: dui |
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Description: 本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。-This paper described the principle and how DTMF in MATLAB to generate DTMF signals, mainly related to the telephone dial tone of the basic principles of synthesis and identification of the main methods, the use of MATLAB software and the FFT algorithm on the telephone communication system dial tone Synthesis and Recognition . And further the use of MATLAB in the production of graphical user interface simple and intuitive GUI interface simulation. Able to take advantage of matrix synthesis of different fundamental frequency 0- 9 different keys of the dial tone and be able to different dial tone to be the correct identification, the dial tone from a telephone number to resolve the process of completion of the telephone dial tone system, a simple experiment simulation.
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Size: 4096 |
Author: 冯扬 |
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Description: matlab实现快速傅立叶变换，采用了矩阵法-matlab realize fast Fourier transform using the matrix method
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Size: 1024 |
Author: 孙少卿 |
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Description: 使用GPU的强大并行计算能力来实现稠密矩阵的LU分解计算。-The use of a powerful GPU parallel computing capability to realize dense matrix LU decomposition calculation.
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Author: tiantiancode |
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Description: 第十章 MATLAB 图像正交变换
10.1 正交变换通用算子
10.2 傅立叶变换
10.2.1 傅立叶变换的原理
10.2.2 傅立叶性质
10.2.3 二维离散傅立叶变换（ 2DDFT ）
10.2.4 快速傅立叶变换（ FFT ）
10.2.5 傅立叶变换的研究与应用
10.3 离散余弦变换
10.3.1 DCT 变换矩阵
10.3.2 dct2 函数和 dctmtx 函数
10.4 Walsh- Hadamard 变换
10.5 Radon 变换
10.6 小波变换
10.6.1 小波的定义
10.6.2 小波变换函数
10.6.3 小波变换实例
10.6.4 小波除噪与压缩函数 -Chapter X MATLAB image orthogonal transformation orthogonal transformation 10.1 GM 10.2 Operators 10.2.1 Fourier transform Fourier transform Fourier 10.2.2 the nature of the principle of two-dimensional 10.2.3 Discrete Fourier Transform (2DDFT) 10.2 .4 Fast Fourier Transform (FFT) 10.2.5 Fourier Transform 10.3 Research and Application of Discrete Cosine Transform 10.3.1 DCT transformation matrix 10.3.2 dct2 function and dctmtx function 10.4 Walsh-Hadamard Transform 10.5 Radon Transform 10.6 wavelet transform 10.6.1 the definition of wavelet function 10.6.2 Wavelet Transform Wavelet Transform 10.6.3 Examples 10.6.4 Wavelet Denoising and Compression Functions
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Size: 5120 |
Author: 王万国 |
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Description: matlab代码，数字图像矩阵数据的显示及其傅立叶变换，二维离散余弦变换的图像压缩，采用灰度变换的方法增强图像的对比度，直方图均匀化，模拟图像受高斯白噪声和椒盐噪声的影响，采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波-matlab code, digital image data display matrix and its Fourier transform, two-dimensional discrete cosine transform image compression, using gray-scale transformation method to enhance image contrast, histogram homogenization, analog image by Gaussian white noise and salt and pepper the impact of noise, using two-dimensional median filter function by medfilt2 of salt and pepper noise image filtering
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Author: wang |
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Description: 利用傅里叶变换，在频域上对两幅图像配准，是一种比较配准的新方法，但是对弹性配准的效果不是很好 需要进一步的研究。-Registers two images (2-D rigid translation) within a fraction of a pixel specified by the user. Instead of computing a zero-padded FFT (fast Fourier transform), this code uses selective upsampling by a matrix-multiply DFT (discrete FT) to dramatically reduce computation time and memory without sacrificing accuracy
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Author: wangwei |
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Description: The code performs a number (ITERS) of iterations of the
Bailey s 6-step FFT algorithm (following the ideas in the
CMU Task parallel suite).
1.- Generates an input signal vector (dgen) with size
n=n1xn2 stored in row major order
In this code the size of the input signal
is NN=NxN (n=NN, n1=n2=N)
2.- Transpose (tpose) A to have it stored in column
major order
3.- Perform independent FFTs on the rows (cffts)
4.- Scale each element of the resulting array by a
factor of w[n]**(p*q)
5.- Transpose (tpose) to prepair it for the next step
6.- Perform independent FFTs on the rows (cffts)
7.- Transpose the resulting matrix
The code requires nested Parallelism.-The code performs a number (ITERS) of iterations of the
Bailey s 6-step FFT algorithm (following the ideas in the
CMU Task parallel suite).
1.- Generates an input signal vector (dgen) with size
n=n1xn2 stored in row major order
In this code the size of the input signal
is NN=NxN (n=NN, n1=n2=N)
2.- Transpose (tpose) A to have it stored in column
major order
3.- Perform independent FFTs on the rows (cffts)
4.- Scale each element of the resulting array by a
factor of w[n]**(p*q)
5.- Transpose (tpose) to prepair it for the next step
6.- Perform independent FFTs on the rows (cffts)
7.- Transpose the resulting matrix
The code requires nested Parallelism.
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Size: 4096 |
Author: ramya |
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Description: 本实验要求开发一个2-D FFT程序包，使其可以应用于后续的几个实验。这个程序需要完成的功能是用因子（-1）^(x+y)乘以输入图像以实现滤波的中心变换，并还要求用一个实矩阵乘以一个复数矩阵通过调用两个图像的乘法程序来实现对应元素的相乘，同时计算反傅立叶变换，得到的结果乘以（-1）^(x+y)并取其实部最后计算频谱。实验中用到傅立叶变换的基本公式，通过实验我们可以更加深刻的理解频域滤波的基础。-The experiment calls for the development of a 2-D FFT package so that it can be applied to a number of follow-up experiment. This process needs to be done is to factor the function (-1) ^ (x+ y) multiplied by the input image to achieve the center of filter change, and also requires a real matrix multiplied by a complex matrix by calling the two images of the multiplication process to achieve multiplication of the corresponding elements, calculating the anti-Fourier transform at the same time, the result multiplied by (-1) ^ (x+ y) and check the final calculation of the Department of the spectrum in fact. Fourier transform experiment used the basic formula, we can experiment more profound understanding of the basis of frequency domain filtering.
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Author: jhm |
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Description: From given order of rearrangement constructs the permutation matrix P and computes B = P *A*P-From given order of rearrangement constructs the permutation matrix P and computes B = P*A*P
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Size: 2048 |
Author: Sama |
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Description: FFT求矩阵乘法，使用的文件不全，但是你懂的-FFT Matrix multiplication
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Size: 98304 |
Author: fd |
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Description: LED显示点阵屏32X64的完整显示程序经过测试无错误,请下载者珍惜我的劳动成果！-LED Display Screen 32X64 dot matrix display program tested the complete error-free, download the results of those who cherish my work! Thank you
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Size: 3072 |
Author: frank |
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Description: 标准C语言程序，对输入的二维矩阵进行快速傅里叶变换。是一种速度很快的FFT算法。因项目需求编写，完全可用。(Standard C language program, the input two-dimensional matrix fast Fourier transform. Is a fast FFT algorithm. Prepared for the project needs, fully operational.)
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Size: 1024 |
Author: cjx_lhkfw |
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