EMRAH ÜSTÜN

(On Microsoft Visual Studio)

Using OpenCV with Console Application is easy and everywhere is full of information about that.

When we run a Console Application Project, that black window will be open background while program is running. And we can not use Visual Studio’s drag&drop.

Now let’s use OpenCV on a PictureBox on Windows Forms Application.

I’m assuming you’re able to using OpenCV with Console Application already. Beginners must install OpenCV from here.

Create a Windows Forms Application project and then go to project properties;

Configuration Properties > General >

Change Common Language Runtime Support to Common Language Runtime Support(/clr)

Our project is ready for using OpenCV.

And an example;

Remove these lines from main cpp file.
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
Application::Run(gcnew Form1());

And put these;
IplImage* image = cvLoadImage("D:/s.jpg",1);
cvNamedWindow("Window",1);
cvMoveWindow("Window",0,0);
cvShowImage("Window",image);
cvWaitKey(0);
cvDestroyWindow("Window");
cvReleaseImage(&image);

Now we’ve showed an image on a window which is created by us.

And next example, let’s show a picture on Windows Form. Let’s create a Windows Form Application project and make that project property change.

Open Form1.h and drag&drop a PictureBox on it. In the code view, put these codes below to PictureBox definations.

IplImage* img = cvLoadImage("D:/s.jpg",1);
this->pictureBox1->Image = gcnew System :: Drawing :: Bitmap( img->width,img->height,img->widthStep,System :: Drawing :: Imaging :: PixelFormat :: Format24bppRgb , ( System::IntPtr ) img-> imageData);

If we want to process that image,  we’ll process img and than put on PictureBox’s image.

Other warning: Don’t forget to include OpenCV libraries.

Good coding.