1，安装EMgu

2,调用摄像头

        public FaceLoad()
        {
            InitializeComponent();
            try
            {
                capture = new Capture();
                capture.Start();//摄像头开始工作
                capture.ImageGrabbed += frameProcess;//实时获取图像

               
            }
            catch (NullReferenceException excpt)
            {
                //MessageBox.Show(excpt.Message);
            }
        }

 private void frameProcess(object sender, EventArgs arg)
        {
            //Thread.Sleep(3000);
            matImg = new Mat();
            capture.Retrieve(matImg, 0);

            frame=new Image<Bgr, byte>(matImg.Bitmap); 
            picShow.Image = frame;


         }

3，效果如下