搜索资源列表
dftdrew.rar
- 离散傅立叶变换
Disfrft
- 另一种离散傅立叶变换程序-a discrete Fourier transform procedures
TI 54x fft
- DSP编程代码,FFT算法,经典!! FFT实验 一、 理论: 公式(1)FFT运算公式 FFT并不是一种新的变换,它是离散傅立叶变换(DFT)的一种快速算法。由于我们在计算DFT时一次复数乘法需用四次实数乘法和二次实数加法;一次复数加法则需二次实数加法。每运算一个X(k)需要4N次复数乘法及2N+2(N-1)=2(2N-1)次实数加法。所以整个DFT运算总共需要4N^2次实数乘法和N*2(2N-1)=2N(2N-1)次实数加法。如此一来,计算时乘法次数和加法次数都是和
松斋 经典功率谱估计
- 接法又称周期图法,它是把随机序列x(n)的N个观测数据视为一能量有限的序列,直接计算x(n)的离散傅立叶变换,得X(k),然后再取其幅值的平方,并除以N,作为序列x(n)真实功率谱的估计。 -Connection also known as cycle map, it is random sequence x (n) N observational data as a sequence of limited energy, direct calculation x (n) the discr
ImageLab
- 本系统可以完成数字图像的离散傅立叶变换频谱图,中值滤波,腐蚀,膨胀,图像增强,二值化以及二值图像中物体的计数-the system can complete digital images of discrete Fourier transform spectrum, the median filter, corrosion, expansion, image enhancement, two and two binary value objects in the image count
lisanfuliyebianhuan
- 简单方便的DFT(离散傅立叶变换)方法处理图像问题,希望对大家有用。-easy DFT (Discrete Fourier Transform) approach to image problems in the hope that useful for all.
DTMF_GEN_DEC
- Goertzel算法是DTMF信号检测的核心,它利用二极点的IIR滤波器计算离散傅立叶变换值,快速有效的提取输入信号的频谱信息。-Goertzel algorithm algorithm is DTMF signal detection at the core, It uses two poles of the IIR filter calculating the discrete Fourier transform value rapid and effective extraction of
image_dct_trans
- 采用c语言对8**8图像进行离散傅立叶变换,实现对图像压缩处理-to eight images ** 8 discrete Fourier transform, to achieve Image Compression
imagetransformcodes
- 此程序实现图象傅立叶变换、离散傅立叶变换和小波变换、可以自己设定小波变换的参数-this procedure image Fourier transform, discrete Fourier transform and wavelet transform, can set their own parameters of wavelet transform
imagetransformationbymatlab
- 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 freq
BCB_DFT_IDFT
- BCB编写的快速傅立叶变换和反离散傅立叶变换,便于用BCB作为开发平台的研究人员学习图像的正交变换!-BCB prepared by the fast Fourier transform and inverse discrete Fourier transform, ease of use as a development platform BCB researchers studying images of orthogonal transformation!
watermarking-yuanma
- 数字水印常用变换如dct变换小波变换离散傅立叶变换等源代码-transform digital watermark used as Extra transform wavelet transform discrete Fourier transform, and other source code
IdealLowPassFilterusingDFT
- 采用离散傅立叶变换实现的低通滤波器,希望对你们有用,MATLAB实现-discrete Fourier transform of the low-pass filter, and I hope to you useful MATLAB
zxlyasuo
- 用matlab实现基于小波的图像压缩。其中还包括与之做比较的离散傅立叶变换压缩程序-using Matlab wavelet-based image compression. It also includes comparison with the discrete Fourier Transform compression process
hilbertCSharp
- C#编写的离散傅立叶变换程序及希尔伯特变换程序,希尔伯特变换对于信号变换有重要意义。该程序通过验证,效果理想。-prepared by the discrete Fourier transform procedures and Hilbert transform procedures, Hilbert transform for signal conversion, it is of great significance. The procedure validated, the results
radix-2FFT
- 基2FFT,是DFT(离散傅立叶变换)的快速算法-radix 2 FFT, DFT (Discrete Fourier Transform) Fast Algorithm
20070628
- 1.了解离散傅立叶变换及离散余弦变换的基本原理; 2.掌握进行FFT及逆变换的方法; 3.了解图像在频域中处理方法,应用MATLAB语言作简单的低通滤波器。 -1. Understand the discrete Fourier transform and discrete cosine transform the basic principle; 2. master for FFT and inverse transform; 3. understanding of image p
1DTFT(2)
- 实验二 离散时间傅里叶分析 1. 离散时间信号 , ,求 的傅立叶变换 。 离散时间信号 , ,求 的傅立叶变换 -Experiment 2 discrete-time Fourier analysis 1. Discrete-time signal, find the Fourier transform. Discrete-time signal, find the Fourier transform
fft256
- FFT,即为快速傅氏变换,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。-FFT, is the fast Fourier transform, discrete Fourier transform is a fast algorithm, which is the discrete Fourier transform of the odd, even, true, real and other characteristics of
sfft-0.1.0
- 采用MATLAB编程实现二分查找法的稀疏傅立叶变换算法。研究算法参数变化对信号频谱的影响,并对特定的宽带跳频信号进行稀疏傅立叶变换处理,得出相应的频谱,并与快速离散傅立叶变换的结果进行比较。(Recurrence of sparse Fourier transform)