Compile OpenCV with MinGW 4.5.2 under Windows 2.3.0

The tools you need:
1. Installing the QT SDK Environment
2. Install CMake for Windows
3, OpenCV the latest Windows source code
Steps:
1. Add {Qtsdk}\mingw\bin to the System environment variable path in the QT SDK installation directory
2, open CMake, set source location and source code construction location

3, click Configure, select the following

5, Configuer after generate
6, through the MinGW shell into the D:/opencv execution Mingw32-make makefile compilation, Mingw32-make install
7, after completion of D:/opencv Lib, bin directory will generate a library file, at this time we can be lib, bin directory, add source in the Include directory to a separate directory, these constitute the OPENCV SDK
8. Open QT creater Create a QT empty project, modify the Pro file to add OpenCV include and Lib

1. Includepath += D:\OpenCV\include
   
2. LIBS += D:\OpenCV\lib\*. A

9, create C + + source files, add the following code

2. #include <Highgui. H>// contains OPENCV library header file
4. #include <CV. H>
6. int main( int argc, Char** argv ) { // main function
8. Cvnamedwindow( "Example2", cv_window_autosize ); / / Create window, (first name, default size)
10. Cvcapture *capture = NULL; / / video capture structure, used as a parameter of the video acquisition function
12. Capture = cvcreatecameracapture(0); / / turn on the camera and get the video from the camera
14. Iplimage* frame; / / application iplimage type pointer, is to request memory space to hold each frame image
16. while (1) {
18. Frame = cvqueryframe( capture ); / / fetch from the camera and return each frame
20. if ( ! Frame )
22. Break;
24. Cvshowimage( "Example2", frame ); / / Display each frame on the window
26. char c = Cvwaitkey(+); / / delay, about 33 frames per second, according to the human eye viewing speed;
28. if ( c == )
30. Break; / / due to a dead loop, and no console, when pressing the keyboard exc key, exit the loop;
32. }
34. Cvreleasecapture( &capture ); / / free memory;
36. Cvdestroywindow( "Example2" ); / / Destroy window
38. }

10, the compiler after the implementation of the error, this is due to the lack of DLLs, the compiled OPENCV after the successful bin directory to add to the system paht or copy to the project directory, the successful call again