傅立叶变换自编源程序

ATLAB是矩阵实验室（Matrix Laboratory）的简称，是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分。(ATLAB is a matrix laboratory (Matrix Laboratory) for short, is a U.S. company produced a commercial mathematics MathWorks software for algorithm development, data visualization, data analysis and numerical calculation of the senior technical computing language and interactive environment, including MATLAB and Simulink two parts.)

matlab学习很好的书籍，可以全面学习基本用法，数据处理和图形显示。书籍讲解比较全面(The matlab Learning good books, can fully learn the basic usage, data processing and graphics display. More comprehensive books explain)

说明：  对信号进行频域特征提取，先通过傅里叶变换得到信号频谱，再计算频谱特征，包括重心频率，均方频率和频率方差(Firstly, the frequency spectrum of the signal is obtained by Fourier transform, and then the spectrum characteristics, including center of gravity frequency, mean square frequency and frequency variance, are calculated.)

说明：  Hu矩特征提取，可以用于图像特征提取，可运行(Hu)

CIC补偿滤波器的介绍和设计方法，包含MATLAB程序设计方法。(CIC compensation filter and design methods introduced, including MATLAB programming method.)

计算二维图像的灰度游程矩阵，并计算特征统计量(Calculating the gray range matrix of a two-dimensional image and calculating the characteristic statistics)

ISOMAP projction algorithm

matlab 灰度图像线性化，直方图均衡化相关成语，均可运行。(matlab grayscale image linearization, histogram equalization idioms can run.)

说明：  用于验证时域采样定理，进一步理解和使用采样定理(Used to verify the time-domain sampling theorem )

说明：  编写一个函数，输入n为偶数时，调用函数求1/2+1/4+...+1/n,当输入n为奇数时，调用函数 1/1+1/3+...+1/n(利用指针函数) (Write a function, the input n is even, the function call seeking 1/2+1/4+...+ 1/n, when the input n is odd, call the function 1/1+1/3+...+ 1/n (using the pointer function))