matlab

sift算法实现的图像匹配程序，使用matlab编写的，多用于图像拼接，融合等领域。(sift algorithm of image matching procedures, the use of matlab prepared are used for image mosaic, integration and other fields.)

3D电阻率反演Matlab程序 RESINVM3D is a MATLAB package for inverting 3D Dc Resistivity and Electrical Resistivity Tomography data.(3D resistivity inversion of Matlab procedures RESINVM3D is a MATLAB package for inverting 3D Dc Resistivity and Electrical Resistivity Tomography data.)

说明：  利用子程序fast-lot.m,实现对该图像的变化及压缩，并和以为信号做dct后的图像质量相比较。(Using subroutine fast-lot.m, to achieve the changes and compression of the image, and after, and that the signals do dct compare the image quality.)

calculates leakage of a transformer

Introduction Some times it is required that we build a shared library (DLL) from an m-file. M-files are functions that are written in Matlab editor and can be used from Matlab command prompt. In m-files, we employ Matlab built-in functions or toolbox functions to compute something. In my past articles, I showed you some ways to use Matlab engine (vis. API, C++ class or Matlab engine API) for employing Matlab built-in functions, but what about functions that we develop? How can we use them in VC? Is there any interface? This article shows you an idea to employ your own Matlab functions.

关于MATLAB生成正弦波的程序这个是最原始的程序。。。(About MATLAB to generate the sine wave procedures are the most primitive procedures. . .)

BOC调制的相关源码，包括C/Ａ码的产生，Ｄ码的产生，BOC信号调制及解调。非常全面！！！(BOC modulation relevant source, including the C/A code generated, D of the generated code, BOC signal modulation and demodulation. Very comprehensive! ! !)

说明：  w-w1各教徒和w1个非教徒在海上遇险，必须将一半的人投到海中，其余的人才能幸免，于是想了个办法w人围成一圈从第一人开始报数，数到第w2个就将其人丢入海中，又从下个人数，数到第w2个人又丢入海中，依次循环，怎样排才使投入大海的都是非教徒(w-w1 and w1 of all non-believers believers in distress at sea, half of them must be invested in the sea, the others can be spared, so think of one way to w people form a circle from the first people began to count off a few to the first w2 one would be thrown into the sea of its people, and from under the personal number, the number of individuals to the first w2 then thrown into the sea, followed by recycling, how to make it into the sea row are non-believers)

本程序功能为计算一阶双曲型偏微分方程的初值问题,采用Lax-Friedrichs格式计算。(The program features to calculate the first order hyperbolic partial differential equations of the initial value problem, calculated using the Lax-Friedrichs format.)

M=512 原图像长度 N=64 K=8 I=zeros(M,M) J=zeros(N,N) BLOCK=zeros(K,K) 显示原图像 I=imread( f:ceshiyuanshitu.bmp ) figure imshow(I) xlabel( 原始图像 ) 显示水印图像 J=imread( f:ceshilogistic_nuaa64.bmp ) figure imshow(J) xlabel( 水印图像 ) 嵌入水印 tem=1 for p=1:N for q=1:N x=(p-1)*K+1 y=(q-1)*K+1 BLOCK=I(x:x+K-1,y:y+K-1) BLOCK=dct2(BLOCK) if J(p,q)==0 a=-1 else a=1 end BLOCK(2,1)=BLOCK(2,1)*(1+a*0.01) BLOCK=idct2(BLOCK) I(x:x+K-1,y:y+K-1)=BLOCK end end 显示嵌入水印后的图像 figure imshow(I) xlabel( 嵌入水印后的图像 ) imwrite(I, f:ceshiembedded.bmp )