天天向上

namespace WebCam
{
     public partial class Form1 : Form
     {
         private Capture _capture = null;    // 影像機
         private bool _captureInProgress;    // 是否擷取中

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private void ProcessFrame(object sender, EventArgs arg)
       {
           Image<Bgr, Byte> frame = _capture.RetrieveBgrFrame();
          
           Image<Gray, Byte> grayFrame = frame.Convert<Gray, Byte>();
           Image<Gray, Byte> smallGrayFrame = grayFrame.PyrDown();
           Image<Gray, Byte> smoothedGrayFrame = smallGrayFrame.PyrUp();
           Image<Gray, Byte> cannyFrame = smoothedGrayFrame.Canny(100, 60);

          captureImageBox.Image = frame;
           grayscaleImageBox.Image = grayFrame;
           smoothedGrayscaleImageBox.Image = smoothedGrayFrame;
           cannyImageBox.Image = cannyFrame;
       }

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private void button1_Click(object sender, EventArgs e)
        {
            if (_capture != null)
            {
                if (_captureInProgress)
                {  //stop the capture
                    captureButton.Text = "Start Capture";
                    //_capture.Pause();
                    _capture.Stop();
                }
                else
                {
                    //start the capture
                    captureButton.Text = "Stop";
                    _capture.Start();
                }

               _captureInProgress = !_captureInProgress;
            }
        }

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private void button2_Click(object sender, EventArgs e)
{
     if (_capture != null) _capture.FlipHorizontal = !_capture.FlipHorizontal;
}

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private void button3_Click(object sender, EventArgs e)
{
     if (_capture != null) _capture.FlipVertical = !_capture.FlipVertical;
}

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sample code