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   源码介绍

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通过摄像头检测运动，监测运动的物体

使用AForge.Video; 使用AForge.Video.DirectShow; 使用AForge.Vision.Motion; 使用系统; 使用System.Collections.Generic; 使用System.ComponentModel; 使用System.Data; 使用System.Drawing; 使用System.Linq; 使用System.Text; 使用System.Threading; 使用System.Threading.Tasks; 使用System.Windows.Forms;  命名空间Vidoevision { 公共部分类Form1：Form { 私人只读MotionDetector _detector =新的MotionDetector（新的TwoFramesDifferenceDetector（），新的MotionAreaHighlighting（））;  private int _statIndex; private int _statReady; private readonly int [] _statCount = new int [15]; int _flga; public Form1() { InitializeComponent(); CheckForIllegalCrossThreadCalls = false; } public Form1(int flga) {  InitializeComponent(); _flga = flga; } private void OpenVideoSource(IVideoSource source) { Cursor = Cursors.WaitCursor; CloseVideoSource(); videoSourcePlayer.VideoSource =  new AsyncVideoSource(source); videoSourcePlayer.Start(); _statReady = 0; _statIndex = 0; timer.Start(); Cursor = Cursors.Default; } private void btnStart_Click(object sender, EventArgs e) {  FrmCaptureDevice videoCaptureDeviceForm = new FrmCaptureDevice();  if (videoCaptureDeviceForm.ShowDialog() == DialogResult.OK) { OpenVideoSource(new VideoCaptureDevice(videoCaptureDeviceForm.SelectedDevice));  btnStart.Text = "停止"; } else { btnStart.Text = "开始"; CloseVideoSource();  }   }  private void CloseVideoSource() { Cursor = Cursors.WaitCursor; videoSourcePlayer.SignalToStop();  for (int i = 0; i < 50 && videoSourcePlayer.IsRunning; i  ) { Thread.Sleep(100); }  if (videoSourcePlayer.IsRunning) { videoSourcePlayer.Stop(); }  timer.Stop();  if (_detector != null) { _detector.Reset(); }  videoSourcePlayer.BorderColor = Color.Black; Cursor = Cursors.Default;  } private void VideoSourcePlayerNewFrame(object sender, ref Bitmap image) { if (_detector == null) return;  var motionValue = _detector.ProcessFrame(image); if (motionValue > 0) { lblMotionAlert.ForeColor = Color.Red; lblMotionAlert.Text = "检测到动作"; } else { lblMotionAlert.ForeColor = Color.Green; lblMotionAlert.Text = "未检测到移动"; } }  private void Form1_FormClosing(object sender, FormClosingEventArgs e) { CloseVideoSource(); }  private void timer_Tick(object sender, EventArgs e) { IVideoSource theVideoSource = videoSourcePlayer.VideoSource; if (theVideoSource == null) return;  _statCount [_statIndex] = theVideoSource.FramesReceived; _statIndex = _statIndex 1;  如果（_statIndex> = 15） { _statIndex = 0; }  如果（_statReady <15） { _statReady = _statReady 1; }  float single = 0f; for（int i = 0; i <_statReady; i） { single = single _statCount [i]; }  single = single / _statReady; _statCount [_statIndex] = 0;  lblFps.Text = string.Concat（single.ToString（“F2”），“fps”）; }  私人无效Form1_Load（对象发件人，EventArgs e） {  }  } }