Numerical_Solutions_in_MATLAB

从前用matlab编的人脸识别的特征提取以及识别程序，希望有用(The previous series of face recognition using matlab feature extraction and identification procedures, seek to help)

这是一个数字信号处理的matlab源程序，程序里包含快速傅里叶算法等(This is a digital signal processing matlab source, the program contains the fast Fourier algorithm)

自己做的一个三角波发生器，通过改变周期可以自定义频率(a triangle-wave generator)

K最邻近密度估计技术是一种分类方法，不是聚类方法。 不是最优方法，实践中比较流行。 通俗但不一定易懂的规则是： 1.计算待分类数据和不同类中每一个数据的距离（欧氏或马氏）。 2.选出最小的前K数据个距离，这里用到选择排序法。 3.对比这前K个距离，找出K个数据中包含最多的是那个类的数据，即为待分类数据所在的类。(K nearest neighbor density estimation is a classification method, not a clustering method. It is not the best method, but it is popular in practice. Popular but not necessarily understandable rule is: 1. calculate the distance between the data to be classified and the data in each other (Euclidean or Markov). 2. select the minimum distance from the previous K data, where the choice sorting method is used. 3. compare the previous K distances to find out which K data contains the most data of that class, that is, the class to which the data to be classified is located.)

说明：  分数阶傅里叶变换的matlab代码，返回的是其幅值(The matlab code of fractional Fourier transform returns its amplitude)

经典的hough直线变换检测算法，可以极坐标进行转换，然后再检测直线(Line detection algorithm)

查看中国地图在matlab中，编辑中国的海岸线。(See a map of china in matlab, the editor of the Chinese coastline.)

the m file make the LUT for predistoriton system.

This MATLAB software implements the denoising algorithm (the Probabilistic Patch-Based filter) for images damaged by multiplicative Nakagami-Rayleigh noise as presented in: Iterative Weighted Maximum Likelihood Denoising with Probabilistic Patch-Based Weights , C-A. Deledalle, L. Denis and F. Tupin, IEEE Trans. on Image Processing, vol. 18, no. 12, pp. 2661-2672, December 2009. It also corresponds to the NL-SAR filter: A non-local approach for SAR and interferometric SAR denoising , C-A. Deledalle, Florence Tupin and Loï c Denis, in the proceedings of IGARSS, Honolulu, Hawaii, USA, July 2010. This software is free and should be used only for nonprofit purposes. Any unauthorized use of this software for industrial or profit-oriented activities is expressively prohibited.

国外大学用的Matlab入门教材，希望对大家有用(Foreign universities Matlab Introduction to materials used in the hope that useful for everyone)