matlab+opencv混合编程.doc

部分转载已说明来源。原文地址:/zouxy09/article/details/20553007另一篇:/lukylu/p/3966871.html本人环境：matlab 2013 + VS2010 + opencv2.4.9首先:matlab中输入mex -setup 选择编译环境（我选的vs2010）接下来测试一个matlab+c的混编程序.（下面的例子是实现a+b）保存为.c或.cpp文件。我保存的是cvMexAdd.cpp#include mex.hdouble add(double x, double y) return x * y;/标准函数定义是:void mexFunction(int nlhs, mxArray *plhs, int nrhs, const mxArray *prhs)/可以根据自己的喜欢修改变量名/* * nargout:输出变量数 * arrayout：输出数组指针 * nargin：输入变量数 * arrayin：输入数组指针 */void mexFunction(int nargout, mxArray *arrayout, int nargin, const mxArray *arrayin) if(nargin != 2)/输入参数。(最好不要在编程的时候用中文，这里为了方便观察) mexPrintf(输入参数要有2个.n); return; double *a; double b=1.0, c=2.0; arrayout0 = mxCreateDoubleMatrix(1, 1, mxREAL); a = mxGetPr(arrayout0); b = *(mxGetPr(arrayin0); c = *(mxGetPr(arrayin1); *a = add(b, c);然后在matlab中输入mex cvMexAdd.cpp最后cvMexAdd(1,2)测试一下接下来的怎么结合matlab+opencv就简单了。假如matlab中已经写好了一个opencv的cpp程序如下：功能是实现一张图片转换成灰度图.我保存的名称是:cvRGB2Gray.cpp/ Interface: convert an image to gray and return to Matlab/ Author : zouxy/ Date : 2014-03-05/ HomePage : /zouxy09/ Email : #include opencv2opencv.hpp#include mex.husing namespace cv;/*Usage: imageMatrix = RGB2Gray(imageFile.jpeg);Input: a image fileOutPut: a matrix of image which can be read by Matlab*/void exit_with_help()mexPrintf(Usage: imageMatrix = DenseTrack(imageFile.jpg);n);static void fake_answer(mxArray *plhs)plhs0 = mxCreateDoubleMatrix(0, 0, mxREAL);void RGB2Gray(char *filename, mxArray *plhs) mexPrintf(Hello3!n);/ read the imageMat image = imread(filename);if(image.empty() mexPrintf(cant open input file %sn, filename);fake_answer(plhs);return;/ convert it to gray formatMat gray;if (image.channels() = 3)cvtColor(image, gray, CV_RGB2GRAY);elseimage.copyTo(gray);imshow(gray,gray);/ convert the result to Matlab-supported format for returningint rows = gray.rows;int cols = gray.cols;plhs0 = mxCreateDoubleMatrix(rows, cols, mxREAL); double *imgMat; imgMat = mxGetPr(plhs0);for (int i = 0; i rows; i+) for (int j = 0; j cols; j+) *(imgMat + i + j * rows) = (double)gray.at(i, j); void mexFunction(int nlhs, mxArray *plhs, int nrhs, const mxArray *prhs) mexPrintf(Hello!n);if(nrhs = 1)char filename256;mxGetString(prhs0, filename, mxGetN(prhs0) + 1);if(filename = NULL)mexPrintf(Error: filename is NULLn);exit_with_help();return; mexPrintf(Hello2!n);RGB2Gray(filename, plhs);elseexit_with_help();fake_answer(plhs);return;我们编译他需要对matlab进行配置，并且编译的时候需要假如opencv的各种lib库文件，如果每一个文件都这么编译就非常麻烦。原文作者提供了一个类似makefile的代码，统一进行格式化处理，非常方便。代码是matlab的m文件，直接在matlab运行就可以了。% 作者： Jessica 日期: 2014-9-10 主页: /lukylu/% Matlab and C+ mixed programming(dependent on opencv library)% First step(before exeuting this program): use mex -setup to choose your c/c+ compilerclear all;% 判断系统位is_64bit = strcmp(computer,MACI64) | strcmp(computer,GLNXA64) | strcmp(computer,PCWIN64);%-我的是64位系统，注意下面的配置需要手动修改几个地方- % Notice: if your system is 64bit, your OpenCV must be 64bit! out_dir=./; %你的opencv路径，我的是d:/opencv include的路径写在-I后面 lib路径写在-L后面%如果你遇到问题，不放试一试x64或x86 或者用release调试，或者用debug调试(lib后面有d)%一定要根据自己的opencv路径和版本修改对应的位置CPPFLAGS = -O -DNDEBUG -I. -ID:opencvbuildinclude -ID:opencvbuildincludeopencv -ID:opencvbuildincludeopencv2; LDFLAGS = -LD:opencvbuildx64vc10lib; % your OpenCV lib path mypath is D:opencv.% LDFLAGS = -LD:opencvbuildx86vc10lib;%LIBS = -lopencv_calib3d249d -lopencv_contrib249d -lopencv_core249d -lopencv_features2d249d -lopencv_flann249d -lopencv_gpu249d -lopencv_highgui249d -lopencv_imgproc249d -lopencv_legacy249d -lopencv_ml249d -lopencv_nonfree249d -lopencv_objdetect249d -lopencv_photo249d -lopencv_stitching249d -lopencv_ts249d -lopencv_video249d -lopencv_videostab249d;LIBS = -lopencv_calib3d249 -lopencv_contrib249 -lopencv_core249 -lopencv_features2d249 -lopencv_flann249 -lopencv_gpu249 -lopencv_highgui249 -lopencv_imgproc249 -lopencv_legacy249 -lopencv_ml249 -lopencv_nonfree249 -lopencv_objdetect249 -lopencv_photo249 -lopencv_stitching249 -lopencv_ts249 -lopencv_video249 -lopencv_videostab249;if is_64bit CPPFLAGS = CPPFLAGS -largeArrayDims; end %你要编译的opencv程序compile_files = %the list of your code files which need to be compiled cvRGB2Gray.cpp ;%- %- % compilingfor k = 1 : length(compil