weina

clear all I=imread( lena.bmp ) figure imshow(I) I2=imrotate(I,-4, bilinear ) 逆时针旋转4度 figure imshow(I2) I3=fliplr(I) 垂直镜像 figure imshow(I3) I4=imresize(I,0.5, bilinear ) 缩小为原图的1/2 figure imshow(I4) A=double(I) 转换为double类型 计算7个不变矩 [nc,nr]=size(A) [x,y]=meshgrid(1:nr,1:nc) 得到网格 x=x(:) y=y(:) A=A(:) m.m00=sum(A) if m.m00==0 m.m00=eps end m.m10=sum(x.*A) m.m01=sum(y.*A) 计算均值 xmean=m.m10/m.m00 ymean=m.m01/m.m00 计算中心矩(li9_23.rar cm.cm00=m.m00 cm.cm02=(sum((y-ymean).^2.*A))/(m.m00^2) cm.cm03=(sum((y-ymean).^3.*A))/(m.m00^2.5) cm.cm11=(sum((x-xmean).*(y-ymean).*A))/(m.m00^2) cm.cm12=(sum((x-xmean).*(y-ymean).^2.*A))/(m.m00^2.5) cm.cm20=(sum((x-xmean).^2.*A))/(m.m00^2) cm.cm21=(sum((x-xmean).^2.*(y-ymean).*A))/(m.m00^2.5) cm.cm30=(sum((x-xmean).^3.*A))/(m.m00^2.5) im(1)=cm.cm20+cm.cm02 im(2)=(cm.cm20-cm.cm02)^2+4*cm.cm11^2 im(3)=(cm.cm30-3*cm.cm12)^2+(3*cm.cm21-cm.cm03)^2 im(4)=(cm.cm30+cm.cm12)^2+(cm.cm21+cm.cm03)^2 im(5)=(cm.cm30-3*cm.cm12)*(cm.cm30+cm.cm12)... *((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)... +(3*cm.cm21-cm.cm03)*(cm.cm21+cm.cm03)... +(3*(cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2) im(6)=(cm.cm20-cm.cm02)*((cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2)... +4*cm.cm11*(cm.cm30+cm.cm12)*(cm.cm21+cm.cm03) im(7)=(3*cm.cm21-cm.cm03)*(cm.cm30+cm.cm12)... *((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)... +(3*cm.cm12-cm.cm30)*(cm.cm21+cm.cm03)... *()

实现了基于matlab web server的虚拟试验平台的程序，实现了部分信号与系统的验证性试验(Implementation of virtual experimental platform of Matlab Web based on server program, realized the confirmatory test signals and systems Part)

the code is read the video frame, then using the movie() function to play automatically

计算序列的DFT，并画出其幅度和频谱曲线(Computing the DFT of the sequence, and draw the magnitude and spectrum curve)

matlab计算气象专业常用EOFscale程序，经测试可以使用(Common EOFscale meteorological computing matlab procedures)

基于matlab开发的特征选择算法，提取ECG（心电信号）的最有特征组合，降低特征维度。(Based matlab developed feature selection algorithm the extracted ECG (ECG) is the most feature combination to reduce the feature dimension.)

二元线阵复加权的小程序，输出不同条件的方向图波束，很好的概念展示(The two yuan line array of complex weighting applet, the output beam pattern of the different conditions, the concept of good show)

说明：  一个简单的运动目标检测程序，适合初学者看的，环境matlab，，(A simple moving target detection procedure, suitable for beginners look at the environment matlab,,)

a set of packages fuzzy logic in various applications: fluid applications, fuzzy logic, Kalman filter and movement of mobile

感知机学习的源代码，希望能对大家有学习上的帮助！(Perception of the source code of machine learning, we hope to help learning!)