Basler 相机图像 OpenCvSharp3

Question

I want to put a PictureBox on WinForm in C # using a Basler camera. But I want to convert IGrabImage to Mat. because I want to insert it into the PictureBox using Mat.

Please let me know your hint or solution.

PixelDataConverter converter = new PixelDataConverter();

    public Form1() {
        InitializeComponent();
        using (Camera camera = new Camera())
        {
            camera.CameraOpened += Configuration.AcquireContinuous;

            camera.Open();
            camera.Parameters[PLCameraInstance.MaxNumBuffer].SetValue(5);
            camera.StreamGrabber.Start();

            IGrabResult grabResult = camera.StreamGrabber.RetrieveResult(5000, TimeoutHandling.ThrowException);

            using (grabResult)
            {
                if (grabResult.GrabSucceeded) {
                    Mat rtnMat = convertToMat(grabResult);                       
                    Cv2.ImShow("test", rtnMat);
                    pictureBox1.Image = BitmapConverter.ToBitmap(frame);
                }
            }

            camera.StreamGrabber.Stop();
            camera.Close();
        }
    }

    private Mat convertToMat(IGrabResult rtnGrabResult) {
        IImage image = rtnGrabResult;
        converter.OutputPixelFormat = PixelType.BGR8packed;
        byte[] buffer = image.PixelData as byte[];
        return new Mat(rtnGrabResult.Width, rtnGrabResult.Height, MatType.CV_8UC1, buffer);
    }

Basler Image:

OpenCvSharp Image:

Answer 1

Here is the correct way to convert an IGrabResult into an OpenCvSharp.Mat. I didn't try it without the converter but your main problem was the sequence of the new Mat(..) arguments. In OpenCV, you declare the rows first and then the columns. That means first height and then width. And also the MatType for an colored image was wrong like @Nyerguds said. It has to be CV_8UC3.

Corrected code:

private Mat convertToMat(IGrabResult rtnGrabResult) {
        converter.OutputPixelFormat = PixelType.BGR8packed;
        byte[] buffer = new byte[conv.GetBufferSizeForConversion(rtnGrabResult];
        converter.Convert(buffer, rtnGrabResult);
        return new Mat(rtnGrabResult.Height, rtnGrabResult.Width, MatType.CV_8UC3, buffer);
}