1 class CameraHelper 2 { 3 /// <summary> 4 /// 连接摄像头数量 5 /// </summary> 6 public static int cameraCount = 0; 7 /// <summary> 8 /// 当前选择的摄像头Id 9 /// </summary> 10 public static int cameraId = 0; 11 /// <summary> 12 /// 摄像头对象 13 /// </summary> 14 public static VideoCapture _cameraCapture; 15 public static bool _captureInProgress = false; 16 public static Mat _frame; 17 public static Image<Bgr, byte> imgSource = null; 18 public static Image<Bgr, byte> imgClone = null; 19 /// <summary> 20 /// 视频展示PictureBox句柄 21 /// </summary> 22 public static PictureBox picCapture; 23 /// <summary> 24 /// 打开摄像头 25 /// </summary> 26 /// <param name="width"></param> 27 /// <param name="height"></param> 28 /// <param name="a"></param> 29 public static void OpenUSBCarmer(double width, double height,int a=0) 30 { 31 try 32 { 33 if (_cameraCapture != null) 34 { 35 _cameraCapture.Stop(); 36 _cameraCapture.Dispose(); 37 } 38 _cameraCapture = returnCapture( width, height,a); 39 //usb 40 _cameraCapture.ImageGrabbed += ProcessMainFrame; 41 42 //_cameraCapture = new VideoCapture(Common.GetAppConfig("url")); 43 //capture_tick.Start(); 44 _cameraCapture.Start(); 45 _captureInProgress = true; 46 } 47 catch (Exception ex) 48 { 49 Log.WriteLog(new StackTrace(new StackFrame(true)), ex.Message); 50 } 51 } 52 /// <summary> 53 /// 连接摄像头，设置摄像头参数，并返回摄像头对象 54 /// </summary> 55 /// <param name="a">usb摄像头的话，可设置index=a</param> 56 /// <returns>摄像头对象</returns> 57 public static VideoCapture returnCapture( double width,double height, int a = 0) 58 { 59 VideoCapture capture;//摄像头对象 60 try 61 { 62 63 capture = new VideoCapture(a); 64 //Mat frame = new Mat(); 65 double xx = capture.GetCaptureProperty(CapProp.FrameHeight); 66 double xw = capture.GetCaptureProperty(CapProp.FrameWidth); 67 //MessageBox.Show("h:" + xx + "w:" + xw+ "" + width + "height:" + height); 68 double xy = capture.GetCaptureProperty(CapProp.GigaFrameSensWidth); 69 // 这里设置的分辨率是从配置文件读取分辨率，
//这里需要注意，我设置的这个太高了，曾经在win7电脑上不能读出图像，搞了好久才发现错误原来是设置的分辨率太高了 70 capture.SetCaptureProperty(CapProp.FrameWidth, 2448); 71 capture.SetCaptureProperty(CapProp.FrameHeight, 3264); 72 73 // capture.SetCaptureProperty(CapProp.Fps, Common.GetInstance().Con_Model.FrameFPS); 74 return capture; 75 76 } 77 catch (Exception ex) 78 { 79 Log.WriteLog(new StackTrace(new StackFrame(true)), ex.StackTrace); 80 return null; 81 } 82 } 83 84 /// <summary> 85 /// 对于视频流中的每一帧进行处理 86 /// </summary> 87 /// <param name="sender"></param> 88 /// <param name="arg"></param> 89 public static void ProcessMainFrame(object sender, EventArgs arg) 90 { 91 if (_cameraCapture != null && _cameraCapture.Ptr != IntPtr.Zero) 92 { 93 if (_captureInProgress) 94 { 95 _frame = new Mat(); 96 _cameraCapture.Retrieve(_frame, 0); 97 if (_frame == null || _frame.IsEmpty) 98 { 99 return; 100 } 101 if (imgSource != null) 102 { 103 imgSource.Dispose(); 104 } 105 imgSource = _frame.ToImage<Bgr, byte>(); 106 imgClone = imgSource.Copy(); 107 //将每一帧图片放到视频流框中显示 108 picCapture.Image = imgSource.ToBitmap(); 109 } 110 } 111 112 } 113 /// <summary> 114 /// 停止获取摄像头画面 115 /// </summary> 116 public static void StopCamera() 117 { 118 _cameraCapture.Stop(); 119 _cameraCapture.Dispose(); 120 } 121 /// <summary> 122 /// 获取本地摄像头列表（例如笔记本上有自身摄像头也有USB连接的摄像头） 123 /// </summary> 124 public static void GetCameras() 125 { 126 cameraCount = 0; 127 for (int i = 0; i < 5; i++) 128 { 129 VideoCapture videoCapture = new VideoCapture(i); 130 if (videoCapture.IsOpened) 131 { 132 cameraCount++; 133 } 134 videoCapture.Dispose(); 135 } 136 } 137 }
操作类使用方法：
1 CameraHelper.picCapture = this.picCapture; 2 CameraHelper.OpenUSBCarmer(this .picCapture.Width,this .picCapture.Height);