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傅里叶变换
- 通过图像的变形,实现傅里叶正负变换
keypoint
- 对非平稳信号进行分段、截取,再对处理过后的短时信号做短时傅里叶变换,分析其频谱特性,并找到各个时间节点的频率特性,以便分析不同事件段内的声音特征,以图像的形式表达出,最终达到区分不同声音的目的。(The nonstationary signals are segmented, and then the interception, the short-time signal after processing the short-time Fourier transform, the analysi
频域处理
- 对影像进行频率域处理,利用傅里叶变换得到结果(The image is processed in frequency domain and the results are obtained by Fourier transform)
FFT
- 利用matlab进行傅里叶变换及反变换,实现空域到频域,频域到空域的图像处理(Using Fourier transform and inverse transform, to achieve the airspace to the frequency domain, frequency domain to the airspace image processing)
ch
- 利用MATLAB计算傅里叶变换并作出频谱图像的代码和图像,涉及FFT算法,看代码可以理解一下~为北京理工大学信号与系统实验实验三的答案(Fourier transform using MATLAB calculation and make spectral image code and images, involving the FFT algorithm, look at the code can understand ~ Beijing Institute of Technology sig
fft
- 对数字图像进行傅里叶变换,查看其频谱图及相位图。(Fourier transform of digital images, to see its spectrum and phase diagram.)
新建 Microsoft Word 文档
- opencv实现傅里叶变换,傅立叶变换是把图像从空间域转化到频率域的变换。空间域:一般的情况下,空间域的图像是f(x,y)=灰度级(0-255),形象一点就是一个二维矩阵,每个坐标对应一个颜色值。频率域:频率:对于图像来说可以指图像颜色值的梯度,即灰度级的变化速度,幅度:可以简单的理解为是频率的权,即该频率所占的比例:能量=幅度(可能不太准确),变换结果为F(u,v),F代表幅度值,u代表x方向的频率,v代表y方向的频率(Fu Liye transform is the transformati
fftcalcshift
- 实现了利用傅里叶变换求两张图像平移距离; 输入是两张具有平移关系的图片; 输出distancex,distancey表示求得的平移距离(The Fourier transform is used to calculate the translation distance of two images. The input is two images with a translation relationship. The output distancex, distancey repres
Radix2FFT原版
- 很多时候都会用到傅里叶变换来处理图像数据。可以通过C++来有效的实现快速傅里叶变换。(to effectively implement the fast Fourier transform by C + +.)
MATLAB
- 对二维图像进行傅里叶变换,在频率进行低通滤波(Fourier transform of two-dimensional image and low pass filter in frequency)
dtft
- 实现傅里叶变换,增强图像的对比度,消除不均匀照度(Realize the Fourier transform, enhance the image contrast, eliminate non-uniform illumination)
nufft
- 非均匀傅里叶变换,处理非均匀采样数据。使图像还原度增强(Non-uniform Fourier transform, deal with non-uniform sampling data.Make the image reduction degree increased)
x
- 采用傅里叶变换,实现噪声图像的修复,主要内容是通过傅里叶变换构建高通滤波,使用matlab 编程 实现(The main content is to construct high pass filter by Fourier transform and implement it with Matlab programming)
Simple image and its Fourier transform
- 简单图像及其傅里叶变换,可对图像进行简单的处理,本例为简单图形进行傅里叶变换的基础实例(Simple image and its Fourier transform)
代码
- 傅里叶变换以及图像模糊处理相关代码,已经过运行,没有错误,且能出结果(Fu Liye transform and image fuzzy processing code.)
数字图象实验三LZ
- 将一副灰度图像进行傅里叶变换,产生变换后的图像(Fourier transform of a gray image is used to generate transformed images.)
FFT
- 图像的二维傅里叶变换及变换域滤波,同态滤波(FFT and Wave filtering)
BPF
- matlab 使用傅里叶变换投影反投影sheep-logon(matlab Sheep-logon Projection Back Projection Using Fourier Transform)
Character E in the MATLAB
- 使用matlab二元傅里叶变换全息图,字符“E”的MATLAB模拟计算全息图,字符“E”的MATLAB模拟计算全息图的再现图像(Character "E" in the MATLAB simulation of the reproduced image of the hologram)
分数阶傅里叶变换
- 一种基于分数阶理论的傅里叶变换。可以用在信号特征提取;信号去噪方向;利用二维分数阶傅里叶变换可以实现图像处理,例如图像去噪,加密操作等;FRFT压缩包:frft源程序;以及相应数据处理子函数;两个心电图振动信号可供分析;