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Description: C#快速傅立叶变换，输入为时域的实部和虚部，输出为频域的虚部和实部，并可以选择逆变换或返回模和相位-C# Fast Fourier Transform, enter the domain too real and imaginary parts, the output for the frequency domain of the imaginary part and real part, and can choose or return inverse transform modulus and phase
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Size: 1024 |
Author: wangjh |
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Description: 实现离散傅立叶变换DFT 最后分析得到频谱幅度 相位-Discrete Fourier Transform DFT realize the final analysis of phase-amplitude spectrum
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Size: 3559424 |
Author: stream |
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Description: 关于傅立叶描述子的GUI界面，本程序可计算目标的一种形状描述符——轮廓傅立叶描述子。并可通过傅立叶描述符重构目标轮廓。-On the Fourier descriptors of the GUI interface, this program objectives computable descriptor of a shape- the outline of Fourier descriptors. Via Fourier reconstruction of the target outline descriptor.
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Size: 26624 |
Author: xiaoqinkun |
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Description: 基于傅立叶变换的数字水印嵌入技术(毕设)(内有英文翻译)-Fourier transform-based digital watermark embedding technologies (complete set) (with English translation)
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Size: 2525184 |
Author: 陈彩琼 |
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Description: Generation of signal with extra parameters
Detection using
Fast Fourier Transform Algorithm
Goertzel Algorithm
Digital Filtering (FIR Filter bank)
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Size: 63488 |
Author: dairy |
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Description: 数字图像矩阵数据的显示及其傅立叶变换
P0302：二维离散余弦变换的图像压缩
P0303：采用灰度变换的方法增强图像的对比度
P0304：直方图均匀化
P0305：模拟图像受高斯白噪声和椒盐噪声的影响
P0306：采用二维中值滤波函数medfilt2对受椒盐噪声干扰的图像滤波
P0307：采用MATLAB中的函数filter2对受噪声干扰的图像进行均值滤波
P0308：图像的自适应魏纳滤波
P0309：运用5种不同的梯度增强法进行图像锐化
P0310：图像的高通滤波和掩模处理-Digital image data display matrix and its Fourier transform P0302: Two-dimensional discrete cosine transform image compression P0303: gray-scale transformation of the methods used to enhance image contrast P0304: Histogram of homogenization P0305: analog image by Gaussian white noise and Salt and Pepper Noise impact P0306: A two-dimensional median filtering function medfilt2 of interference by salt and pepper noise image filtering P0307: using MATLAB in filter2 function affected by noise interference images mean filter P0308: Image Adaptive Weiner filtering P0309: the use of five kinds of different gradient enhanced image sharpening method P0310: Image of high-pass filtering and mask treatment
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Size: 120832 |
Author: sol |
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Description: 用Fourier变换求取信号的功率谱---周期图法
用Fourier变换求取信号的功率谱---分段周期图法
用Fourier变换求取信号的功率谱---welch方法
功率谱估计----多窗口法（multitaper method ,MTM法）
功率谱估计----最大熵法（maxmum entmpy method,MEM法）
功率谱估计----多信号分类法（multiple signal classification,music法）Fourier transform to strike a signal to the power spectrum - the cycle of plans
Fourier transform to strike a signal to the power spectrum - Sub-cycle Method
Fourier transform to strike a signal to the power spectrum --- welch method
Power spectrum estimated more than window ---- Law (multitaper method, MTM)
---- Power spectrum estimate of maximum entropy (maxmum entmpy method, MEM)
---- More than the estimated power spectrum signal classification (multiple signal classification, music)-To strike a signal with Fourier transform power spectrum- periodogram to strike a signal with Fourier transform power spectrum- Sub-periodogram with Fourier transform power spectrum of the signal to strike-welch method of power spectrum estimation multi-window method (multitaper method, MTM method) Maximum entropy power spectrum estimation method (maxmum entmpy method, MEM law) power spectrum estimation multi-signal classification (multiple signal classification, music law) Fourier transform to strike a signal to the power spectrum- the cycle of plans Fourier transform to strike a signal to the power spectrum- Sub-cycle Method Fourier transform to strike a signal to the power spectrum- welch method Power spectrum estimated more than window Law (multitaper method, MTM) Power spectrum estimate of maximum entropy (maxmum entmpy method, MEM ) More than the estimated power spectrum signal classification (multiple signal classification, music)
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Size: 2048 |
Author: walkinghill |
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Description: 计算快速傅立叶变换fft的程序，用matlab实现的-Fft Fast Fourier Transform calculation procedures, using matlab realize the
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Size: 1024 |
Author: 段 |
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Description: 分数阶傅立叶变换程序总结，共有6个程序。-Fractional Fourier Transform program summary, a total of six procedures.
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Size: 12288 |
Author: zoufeng |
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Description: 离散傅里叶变换是20世纪60年代是计算复杂性研究的主要里程碑之一，1965年Cooley和Tukey所研究的计算离散傅里叶变换(Discrete Fourier Test)的快速傅氏变换(FFT)将计算量从О(n2)下降至О(nlogn)，推进了FFT更深层、更广法的研究与应用。
这是一个傅氏变换的MPI程序，用C语言实现。-Discrete Fourier Transform of the 20th century 60 s computational complexity is a major milestone in one study, in 1965 Cooley and Tukey studied the calculation of discrete Fourier transform (Discrete Fourier Test) fast Fourier transform (FFT) calculation increased from О (n2) dropped to О (nlogn), the FFT to promote deeper, broader research and application of law. This is a Fourier transform of the MPI process, with C language.
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Size: 4096 |
Author: chj |
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Description: 付立叶变换
付立叶变换
付立叶变换-Fourier Transform Fourier Transform Fourier Transform
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Size: 47104 |
Author: wssip |
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Description: MSP430编写的快速傅立叶变换，用于信号在频域中的分析，经过msp430f2274测试完全正常-MSP430 prepared by fast Fourier transform for signal analysis in frequency domain, after a completely normal test msp430f2274
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Size: 1024 |
Author: 余松柏 |
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Description: 用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图
-Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Make the rms signal of the three maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform
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Size: 1024 |
Author: river |
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Description: 分数阶傅立叶变换程序--土耳其算法
主程序在Symplectic/fracft
要调用程序在Utils里找。
在matlab里file-〉set path里设置好路径即可。-Fractional Fourier Transform procedure- the main program in Turkey algorithm Symplectic/fracft to call the procedure in finding Utils. Matlab Lane in file-> set path where you can set a good path.
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Size: 92160 |
Author: 贾冉 |
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Description: 利用傅里叶描述子进行物体形状分析：
对于一个物体的边缘即形状来说，可将其看作是平面在空间坐标系下的点集构成的闭合曲线，这样就可用周期函数来描述其外形，可以进行离散傅里叶变换，将图像由空域表示转换到频域表示，变换后的函数可由傅里叶变换系数来描述。对于数字图像的频谱来说，低频分量的分布反映了图像主体的基本形状，高频分量的分布反映图像的细节-Fourier descriptors for object shape analysis: For the edge of an object or shape, it can be regarded as the plane in the space coordinates of the point set consisting of closed curves, so that periodic function can be used to describe its shape , can be discrete Fourier transform, the image from the airspace, said the conversion to the frequency domain that function can be transformed to describe the Fourier transform coefficients. For digital images of the spectrum, the distribution of low-frequency components reflect the basic shape of the main images, high-frequency component of the distribution reflects the image details
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Size: 11264 |
Author: 吴亚鹏 |
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Description: fft自编源码，用于快速傅立叶变换的matlab程序-fft own source for the Fast Fourier Transform matlab procedures
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Size: 1024 |
Author: 连蓬勃 |
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Description: 傅立叶描述子是分析和识别物体形状的重要方法之一．利用基于曲线多边形近似的连续傅立叶变换方法
计算傅立叶描述子，并通过形状的主方向消除边界起始点相位影响的方法，定义了新的具有旋转、平移和尺度不变
性的归一化傅立叶描述子．与使用离散傅立叶变换和模归一化的传统傅立叶描述子相比，新的归一化傅立叶描述
子同时保留了模与相位特性，因此能够更好地识别物体的形状．实验表明这种新的归一化傅立叶描述子比传统的
傅立叶描述子能够更加高效、准确地识别物体的形状．
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Size: 243712 |
Author: xuyukun |
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Description: 基于matlab的功率谱分析以及短时傅立叶变换-Matlab based on the power spectrum analysis as well as the short-time Fourier transform
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Size: 1024 |
Author: hp |
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Description: 分数阶fourier变换程序，基于插值和抽取操作和卷积运算的快速算法。-Fractional fourier transform procedures, based on interpolation and extraction operation and fast algorithm for convolution operation.
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Size: 1024 |
Author: julia |
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Description: FFTW, a collection of fast C routines to compute the Discrete
Fourier Transform in one or more dimensions.The fftw/ directory contains the source code for the complex transforms,
and the rfftw/ directory contains the source code for the real transforms.
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Size: 1546240 |
Author: 北科 |
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