LAGRANGE

memset函数、memcopy函数和strcpy函数的用法，在笔试中通常让比较这些函数(Usage memset function, memcopy function and strcpy function, which is usually written to allow comparison of these functions)

说明：  基于卡尔曼、扩展卡尔曼滤波的雷达目标跟踪，并比较观测误差和两种滤波算法误差。(Radar target tracking based on Kalman and extended Kalman Filter,the errors of observation and two filtering algorithms are compared.)

a function that calculate the laplacian transform of an given image

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)... *()

图像检索,MATLAB编译,还可以用用,希望看看(Image retrieval, MATLAB compiler, and can be used with, hope to see)

时频分析工具箱，作为补充MATLAB时频分析功能的源代码(Time-Frequency Analysis Toolbox as a supplementary function of time-frequency analysis MATLAB source code)

2-D FDTD TE code with PML absorbing boundary conditions Program author: Susan C. Hagness

本电子资源是《matlab 2007 基础教程》的配套电子资源，包含PPT 和程序实例以及课后题答案。(The electronic resources is " matlab 2007 Essentials" package of electronic resources, including examples of PPT and procedures and answer questions after school.)

谭浩强（第三版） 程序代码及习题答案.rar(Hao (third edition) program code and answer the questions. Rar)

可以对某一块海洋区域进行纵切断面，并在一张图上生成几个图片(Can conduct a longitudinal section of a marine areas, and generate a few pictures on a map)