OpenCV with Eclipse CDT and MinGW

Prerequisites:

1. CMake  http://www.cmake.org/ 
2. MinGW with MSYS http://www.mingw.org/ 
3. OpenCV source code http://sourceforge.net/projects/opencvlibrary/files/opencv-win/2.2/ 
4. Eclipse CDT http://www.eclipse.org/cdt/

 Let say, you download OpenCV and put it into C:/c-dev/OpenCV-2.2.0

1. Open MSYS and go to OpenCV folder
   

   cd C:/c-dev/OpenCV-2.2.0

2. Run CMake command to generate "Build files"
   

   cmake -G "Unix Makefiles" .

3.  Build OpenCV
   

   make
   make install

4. Add bin directory to your PATH
   

   C:\c-dev\OpenCV-2.2.0\bin

After successfully build process you can see dll files in "bin" folder and library files ".dll.a" in "lib" folder. Now you are ready to make the first OpenCV program.

• Create new project

• Add header path

• Add library path

• Add libraries

Time to code

#include <iostream>
#include "opencv2/opencv.hpp"

int main(int argc, char** argv) {
cout << "Hello OpenCV" << endl;
IplImage* img = cvLoadImage("lena.jpg", CV_LOAD_IMAGE_COLOR);
if (img) {
cvShowImage("Hello OpenCV", img);
cvWaitKey(0);
cvDestroyAllWindows();
}
return 0;
}