C# CV.Capture类代码示例

        public FormTrain(Form1 frm1,Classifier_Train cls)
        {
            InitializeComponent();
            _form1 = frm1;

            eigenRecog = cls;
            face = new HaarCascade("haarcascade_frontalface_default.xml");
            eyeWithGlass = new CascadeClassifier("haarcascade_eye_tree_eyeglasses.xml");
            mydb = new DBConn();
            minEye = new Size(10, 10);
            maxEye = new Size(225, 225);
            font = new MCvFont(FONT.CV_FONT_HERSHEY_TRIPLEX, 0.5d, 0.5d);
            
            captureT = new Capture();
            if (File.ReadAllText("setting.txt") != null)
            {
                folderPath = File.ReadAllText("setting.txt");
            }
            else
            {
                FolderBrowserDialog b = new FolderBrowserDialog();
                b.Description = "Please select your installation path";
                DialogResult r = b.ShowDialog();
                if (r == DialogResult.OK) // Test result.
                {
                    folderPath = b.SelectedPath;
                    Console.WriteLine(folderPath);
                    File.WriteAllText(@"setting.txt", folderPath);
                    MessageBox.Show("Path is at " + folderPath);
                }
            }
            initializeCombobox();
            Application.Idle += new EventHandler(TrainFrame);
            
        }

        public RileeCapture()
        {
            InitializeComponent();

            btnDrawMasterImage.Enabled = false;

            //initialization for recognition boxes
            _limgMasters.Add(imbMaster1);
            _limgMasters.Add(imbMaster2);
            _limgMasters.Add(imbMaster3);
            _limgMasters.Add(imbMaster4);
            _limgMasters.Add(imbMaster5);

            try
            {
                _capture = new Capture();
                _capture.ImageGrabbed += ProcessFrame;
                _capture.Start();
                tslStatus.Text = "Capture started";
                //flip horizontal to natural
                //if ((_capture != null)&&(!_capture.FlipHorizontal)) _capture.FlipHorizontal = true;
            }
            catch (NullReferenceException ex)
            {
                tslStatus.Text = "Capture initialization failed...";
                MessageBox.Show(ex.Message);
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            #region if capture is not created, create it now
            if (capture == null)
            {
                try
                {
                    capture = new Capture();
                }
                catch (NullReferenceException excpt)
                {
                    MessageBox.Show(excpt.Message);
                }
            }
            #endregion

            if (capture != null)
            {
                if (captureInProgress)
                {  //if camera is getting frames then stop the capture and set button Text
                    // "Start" for resuming capture
                    button1.Text = "Start!"; //
                    Application.Idle -= ProcessFrame;
                }
                else
                {
                    //if camera is NOT getting frames then start the capture and set button
                    // Text to "Stop" for pausing capture
                    button1.Text = "Stop";
                    Application.Idle += ProcessFrame;
                }

                captureInProgress = !captureInProgress;
            }
        }

      public Form1()
      {
         InitializeComponent();

         //try to create the capture
         if (_capture == null)
         {
            try
            {
               _capture = new Capture();
            }
            catch (NullReferenceException excpt)
            {   //show errors if there is any
               MessageBox.Show(excpt.Message);
            }
         }

         if (_capture != null) //if camera capture has been successfully created
         {
            _motionHistory = new MotionHistory(
                1.0, //in second, the duration of motion history you wants to keep
                0.05, //in second, parameter for cvCalcMotionGradient
                0.5); //in second, parameter for cvCalcMotionGradient

            Application.Idle += ProcessFrame;
         }
      }

    static void Main(string[] args)
    {
      navigationMatrix = new Matrix3D();
      navigationMatrix.Translate(new Vector3D(0, 100, 110));
      navigationMatrix.Scale(new Vector3D((double)1 / 5, (double)1 / 5, (double)1 / 5));

      displayProfile = new Bin[Bin.RANGEL, Bin.RANGEA, Bin.RANGEB];
      for (int l = 0; l < Bin.RANGEL; l++)
        for (int a = 0; a < Bin.RANGEA; a++)
          for (int b = 0; b < Bin.RANGEB; b++)
            displayProfile[l, a, b] = new Bin(l, a, b);

      PopulateProfile(displayProfile, navigationMatrix);

      String path = Environment.CurrentDirectory + PATH_TO_VIDEO;
      if (!System.IO.File.Exists(path))
        return;


      //Opens the movie file
      capture = new Capture(path);
      double fps = capture.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS);

      //Reads frame by frame
      Timer timer = new Timer(1000 / fps);
      timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
      timer.Start();

      Console.Read();
    }

        public AIRecognition()
        {
            InitializeComponent();

            _faceClassifier = new CascadeClassifier("haarcascade_frontalface_default.xml");

            Loaded += (s, e) =>
            {
                _vmodel.Pictures.Clear();
                _vmodel.PersonRecognized = 0;
                this.DataContext = _vmodel;

                if (grabber == null)
                {
                    CommonData.LoadSavedData();
                    //check how many faces we already have
                    _countFaces = CommonData.PicturesVM.Pictures.Count;

                    grabber = new Capture();
                    grabber.QueryFrame();
                    grabber.Start();
                }
                else
                {
                    grabber.Start();
                }

            };
            Unloaded += (s, e) =>
            {
                grabber.Stop();
            };

            CompositionTarget.Rendering += CompositionTarget_Rendering;
        }

        public Program()
        {
            bool isProcessing = false;
               this._stopwatch = new System.Diagnostics.Stopwatch();
               this._capture = new Capture();

               this.components = new System.ComponentModel.Container();
               this.contextMenu = new System.Windows.Forms.ContextMenu();
               this.menuItem = new System.Windows.Forms.MenuItem();
               this.contextMenu.MenuItems.AddRange(
                           new System.Windows.Forms.MenuItem[] { this.menuItem });
               this.menuItem.Index = 0;
               this.menuItem.Text = "E&xit";
               this.menuItem.Click += new System.EventHandler(
                    delegate(object sender, EventArgs e) {
                         Application.Exit();
                    });
               this.notifyIcon = new System.Windows.Forms.NotifyIcon(this.components);
               notifyIcon.Icon = new Icon("info.ico");
               notifyIcon.ContextMenu = this.contextMenu;
               notifyIcon.Text = "Shoulder Surfer Alert";
               notifyIcon.Visible = true;

               this._runner = new System.Threading.Timer(new System.Threading.TimerCallback(
                    delegate(object state) {
                         if (!(bool)state) {
                              state = true;
                              this.ProcessFaces();
                              state = false;
                         }
                    }), isProcessing, 0, 500);
        }

        private void run()
        {
            Image<Bgr, Byte> image = new Image<Bgr, byte>("lena.jpg"); //Read the files as an 8-bit Bgr image
            Capture vid = new Capture("kw.avi");
            vid.FlipVertical = true;
            int x = 0;
            TimeSpan time = TimeSpan.Zero;
            MCvFont font = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_COMPLEX, 1.0, 1.0);
            using (VideoWriter vw = new VideoWriter("out3.avi", 15, 640, 480, true))
            {

                while (vid.Grab())
                {
                    //if (++x % 1 != 0) continue;

                    image = vid.RetrieveBgrFrame();

                    long detectionTime;
                    List<Rectangle> faces = new List<Rectangle>();
                    List<Rectangle> eyes = new List<Rectangle>();
                    DetectFace.Detect(image, "haarcascade_frontalface_default.xml", "supersmile.xml", faces, eyes, out detectionTime);
                    foreach (Rectangle face in faces)
                        image.Draw(face, new Bgr(Color.Red), 2);
                    foreach (Rectangle eye in eyes)
                        image.Draw(eye, new Bgr(Color.Blue), 2);
                    if (eyes.Count > 0) time = time.Add(new TimeSpan(0, 0, 0, 0, 66));
                    //display the image
                    image.Draw(String.Format("{0}:{1}", time.Seconds, time.Milliseconds), ref font, new Point(50, 50), new Bgr(0, 0, 255));
                    setimage(image);
                    vw.WriteFrame<Bgr, Byte>(image);
                }
            }
        }

        private static void StartClient()
        {
            th_cli = new Thread (delegate() {
                try
                {
                    ConsoleAdditives.WriteHeader("Stream started");
                    Capture cap = new Capture();
                    while(_isRunning) {
                        byte[] buf = cap.QueryGrayFrame().Bytes;
                        int buflp = buf.Length/5;

                        for(byte i=0;i<5;i++)
                        {
                            byte[] tbuf = new byte[buflp];
                            tbuf[0]=i;
                            for(int j=1;j<buflp;j++)
                            {
                                tbuf[j]=buf[i*buflp+j];
                            }
                            client.Send(tbuf,buflp,remoteEP);
                        }
                    }
                    ConsoleAdditives.WriteHeader("Stream stoped");
                }
                catch(Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }

            });
            th_cli.Start ();
        }

 public void StartStreaming()
 {
     grabber = new Capture();
     grabber.QueryFrame();
     Application.Idle += new EventHandler(FrameGrabber);
     //All.Enabled = false;
 }

        public Form1()
        {
            InitializeComponent();

             //try to create the capture
             if (_capture == null)
             {
            try
            {
               _capture = new Capture();
            }
            catch (NullReferenceException excpt)
            {   //show errors if there is any
               MessageBox.Show(excpt.Message);
            }
             }

             if (_capture != null) //if camera capture has been successfully created
             {
            _motionHistory = new MotionHistory(
                6, //number of images to store in buffer, adjust it to fit your camera's frame rate
                20, //0-255, the amount of pixel intensity change to consider it as motion pixel
                1.0, //in second, the duration of motion history you wants to keep
                0.05, //in second, parameter for cvCalcMotionGradient
                0.5); //in second, parameter for cvCalcMotionGradient

            Application.Idle += new EventHandler(ProcessFrame);

             }
        }

 public VideoEmgu(GraphicsDevice device, int camIndex)
 {
     this.device = device;
     capture = new Capture(camIndex);
     frame = new Texture2D(device, capture.Width, capture.Height);
     colorData = new Color[capture.Width * capture.Height];
 }

 public FormImageRetrieve(FormManageData formMD)
 {
     _formMD = formMD;
     capture = new Capture();
     InitializeComponent();
     Application.Idle += new EventHandler(runningFrame);
 }

      private void captureButton_Click(object sender, EventArgs e)
      {
         if (capture == null)
         {
            try
            {
               capture = new Capture();
            }
            catch (NullReferenceException exception)
            {
               MessageBox.Show(exception.Message);
            }
            catch (TypeInitializationException exc)
            {
               MessageBox.Show(
                  "Attention: You have to copy all the assemblies and native libraries from an official release of EmguCV to the directory of the demo." +
                  Environment.NewLine + Environment.NewLine + exc);
            }
         }

         if (capture != null)
         {
            if (Capturing)
            {
               captureButton.Text = "Start Capturing";
               Application.Idle -= DoDecoding;
            }
            else
            {
               captureButton.Text = "Stop Capturing";
               Application.Idle += DoDecoding;
            }
            Capturing = !Capturing;
         }
      }

        private void startPreview()
        {
            #region Create capture object if it is not already created

            if (_capture == null)
            {
                try
                {
                    _capture = new Capture();
                }
                catch (NullReferenceException excpt)
                {
                    MessageBox.Show(excpt.Message);
                }
            }

            #endregion

            #region Start the capture process and display in the preview window

            if (_capture != null)
            {
                //start the capture
                
                //Application.Idle += ProcessFrame;
                captureEnabled = true;
                System.Threading.Thread capThread = new System.Threading.Thread(new System.Threading.ThreadStart(captureThread));
                capThread.Start();

            }

            #endregion
        }