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Fourier
- 编写一个程序计算并显示一幅二维图象的Fourier变换(幅度和相位谱)及其逆变换,要求用FFT实现-procedures for the preparation of a calculation and display a two-dimensional image of the Fourier transform (amplitude and phase spectrum) and its inverse transform, called for using the FFT
FFT_FDCT
- 计算并显示一幅二维图象的Fourier变换(幅度和相位谱)及其逆变换,是用FFT实现,调用该程序完成DCT 和IDCT的快速实现程序
FFT_IFFT.rar
- (1)求出两维单色数字图象的傅立叶变换以及逆变换,除对比图象效果外,还要给出以中心点作为原点图象显示方式的傅立叶变换的频谱、相位谱,并验证两维傅立叶变换的性质。 (2)傅立叶变换后,计算图象能量谱的分布范围:画出包含图象能量92.0%,94.6%, 96.4, 98.0% 以及99.5% 的圆圈区域。,(1) obtained two-dimensional monochrome digital image of the Fourier transform and inverse transf
FFT
- 由已知表达式画出原始波形和它的功率谱,并编制一个互相关函数程序,要求提取特定频率的成分,画出变换过程中的波形和功率谱。-Drawn from the known expression of the original waveform and its power spectrum, and the preparation of a cross-correlation function procedure that requires the extraction of specific freque
invspecgram
- 逆短时傅里叶变换,由短时傅里叶谱恢复原信号-INVSPECGRAM Performs the Inverse Short Time FFT (Inverse SPECGRAM).
matlab
- 产生右图所示亮块图像 f1(x,y)(128×128大小,暗处=0,亮处=255),对其进行FFT,同屏显示原图f1和FFT(f1)的幅度谱图,若令f2(x,y)=(-1)x+y f1(x,y),重复以上过程。以及旋转45度后进行变换-Generating shown bright block image F1 (x, y) (128128 size dark = 0, light at = 255), the FFT, the same screen display Original f1 a
FIR
- 数字信号处理基于matlab 文件内容 /conv(卷积部分) dupconv 重叠保留法 freqcirconv 频域圆周卷积 freqconv 频域卷积 timecirconv 时域圆周卷积 timeconv 时域卷积 /fft(频域分析部分) d2fft 基2FFT dft DFT最简化程序 dtft DTFT演示 /fir(fir滤波器设计) fir 得到fir滤波器hn getwindow 得到fir
fft
- 复倒谱分析及最小相位法实验,用MATLAB编程实现求取复倒谱,在求取复倒谱的过程中采用最小相位法避免相位卷绕。 -err
FFT_IFFT.RAR
- 图像的傅立叶及反变换演示程序,包括了打开图像,现实幅度谱等功能-code for 2D image FFT and IFFT transforms.
DSPFFT
- 基于定点DSP的高性能FFT谱估计 基于定点DSP的高性能FFT谱估计-High-performance fixed-point DSP-based FFT spectrum estimation based on high-performance fixed-point DSP FFT spectral estimation
fft
- 使用MATLAB对特定信号进行频谱分析,画出幅度和相位谱的图像,并包含卷积运算和验证程序-Using MATLAB on a specific signal spectrum analysis, to draw the image amplitude and phase spectrum, and includes convolution and verification procedures
testfft
- opencv实现对图像fft变换和逆变换,画出傅里叶变换谱-opencv realized the image fft transform and inverse transform, Fourier transform spectrum plot
fft-filter
- 该程序为傅立叶变换,用来将时域信号进行频域信号分析,保护功率谱、能量谱等。-The program for the Fourier transform, time-domain signal to the frequency domain signal analysis, to protect the power spectrum, the energy spectrum.
zhenxunbo
- 对于正弦波的功率谱分析,仿真成功,并调试出功率谱-Power spectrum fft
image-fft
- 对两幅图像作FFT变换,然后交换两幅图像的幅度谱和相位谱,然后通过逆fft变换还原图像,得到原图和变换后图像的对比,得出图像的幅度谱和相位谱哪个更重要的结果,注意图形是8位灰度图,尺寸大小必须一样-Exchange of the two images of the amplitude spectrum and phase spectrum and inverse FFT transform to restore
FFT
- 通过读入测量文件中的数据并对测量数据进行FFT变换,并求其功率谱,对数谱等,含详细说明,绝对原创。-By reading data from a file into the measurement and the measurement data, FFT, and for its power spectrum, the spectrum, etc., containing detailed instructions, absolutely original.
fft-bianhuan2
- 在风基本特性的理论基础上,应用Shinozuka方法对大跨结构的广义脉动风进行了模拟,引入快速傅立叶变换(FFT)技术以提高计算效率,同时给出了Matlab程序框架,并把模拟谱与目标谱进行比较验证,两者吻合较好.-Based on the theory of the basic characteristics of the wind on the application of the generalized method Shinozuka fluctuating wind span struc
CX11_2
- 离轴数字全息角谱(D-FFT)再现算法,加频谱滤波(Off-axis holographic angle spectrum reconstruction)
快速傅里叶变换及实现——交换两幅图像的相位谱
- 快速傅氏变换(FFT),是离散傅氏变换的快速算法,它是根据离散傅氏变换的奇、偶、虚、实等特性,对离散傅立叶变换的算法进行改进获得的。它对傅氏变换的理论并没有新的发现,但是对于在计算机系统或者说数字系统中应用离散傅立叶变换,可以说是进了一大步。(Fast Fourier transform (FFT) is a fast algorithm for discrete Fourier transform. It is based on the characteristics of discrete
FFT、DWT、filter、PSD
- 对已测信号进行傅里叶变换,进行滤波器降噪,进行功率谱分析(Perform Fourier transform on the measured signal, perform filter noise reduction, and perform power spectrum analysis)