1 this.programState = programState;
  2 this.needClose = needClose;
  3 cameraHandle = 0;
  4 //该函数打开摄像头，一个给定的名称，并返回其手柄。
  5 int r = FSDKCam.OpenVideoCamera(ref cameraName, ref cameraHandle);
  6 if (r != FSDK.FSDKE_OK)
  7 {
  8 errorMsg = "打开摄像头错误,检查是否被其他程序占用。";
  9 }
 10 else
 11 {
 12 errorMsg = null;
 13 }
 14 //设置实时人脸检测参数
 15 FSDK.SetFaceDetectionParameters(false, true, 200);
 16 FSDK.SetFaceDetectionThreshold((int)FaceDetectionThreshold);
 17 
 18 //矩形框X、Y坐标
 19 int X, Y = 0;
 20 Speech("请看着摄像头");
 21 //画面集合
 22 List<FSDK.CImage> imageList = new List<FSDK.CImage>(); 
 23 while (!this.needClose)
 24 {
 25 string userName = null;
 26 float similarity = 0;
 27 Int32 imageHandle = 0;
 28 if (FSDK.FSDKE_OK != FSDKCam.GrabFrame(cameraHandle, ref imageHandle)) // grab the current Faceame Faceom the camera
 29 {
 30 Application.DoEvents();
 31 continue;
 32 }
 33 //事实画面图像
 34 FSDK.CImage image = new FSDK.CImage(imageHandle);
 35 Image FaceameImage = image.ToCLRImage(); 
 36 FSDK.TFacePosition facePosition = image.DetectFace();
 37 Graphics gr = Graphics.FromImage(FaceameImage);
 38 if (facePosition.w != 0)
 39 {
 40 X = facePosition.xc - facePosition.w / 2;
 41 Y = facePosition.yc - facePosition.w / 2;
 42 switch (this.programState)
 43 {
 44 case ProgramState.ReadyRemember: //准备拍摄
 45 ReadyRemember = true;
 46 ReadyState(gr, facePosition, X, Y, "准备拍摄 ", image);
 47 ISpeech = 0;
 48 break;
 49 case ProgramState.Remember: //拍摄状态 
 50 ReadyRemember = false;
 51 TFaceRecord face = null;
 52 faceRecord(FaceameImage, out face);
 53 ISpeech = 0;
 54 this.programState = ProgramState.Recognize;
 55 //拍照后事件
 56 PhotographResult(this, new FaceEventArgs(face, true));
 57 break;
 58 case ProgramState.ReadyRecognize://准备识别 
 59 //检测五官位置
 60 FSDK.TPoint[] facialFeatures = image.DetectFacialFeaturesInRegion(ref facePosition);
 61 gr.DrawRectangle(Pens.LightGreen, X, Y, facePosition.w, facePosition.w);
 62 //两只眼睛Y坐标
 63 if (Math.Abs(facialFeatures[0].y - facialFeatures[1].y) > 20)
 64 {
 65 if (isstop <= 1)
 66 {
 67 isstop++;
 68 Speech("请将头部摆正");
 69 }
 70 }
 71 else
 72 {
 73 imageList.Add(image);
 74 if (imageList.Count > 5)
 75 {
 76 this.programState = ProgramState.Recognize;
 77 }
 78 if (imageList.Count > 10)
 79 {
 80 imageList.Clear();
 81 }
 82 }
 83 break;
 84 case ProgramState.Recognize: // 识别用户 
 85 if (Recognize(imageList, gr, facePosition, X, Y, out userName, out similarity))
 86 {
 87 if (ISpeech == 0)
 88 {
 89 if (!string.IsNullOrEmpty(userName))
 90 {
 91 Speech(userName);
 92 }
 93 ISpeech++;
 94 }
 95 this.programState = ProgramState.Recognize;
 96 if (imageList.Count > 10)
 97 {
 98 imageList.Clear();
 99 }
100 itmp = 0;
101 }
102 else
103 {
104 if (itmp <= 2)
105 {
106 // Speech("未能识别到,检查是否已经录入数据");
107 itmp++;
108 }
109 ISpeech = 0;
110 imageList.Clear();
111 this.programState = ProgramState.ReadyRecognize;
112 }
113 break;
114 case ProgramState.End:
115 //面部范围
116 //gr.DrawRectangle(Pens.LightGreen, X, Y, facePosition.w, facePosition.w);
117 break;
118 }
119 }
120 //显示当前帧事件
121 FaceDetectResult(this, new FaceEventArgs(FaceameImage, userName, similarity)); 
122 //强制垃圾回收 
123 GC.Collect();
124 Application.DoEvents(); 
125 }
126

  /// <summary>
        /// 释放内存
        /// </summary>
        private void ClearMemory()
        {
            GC.Collect();
            GC.WaitForPendingFinalizers();                 
            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
            {
                SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
            }
        }

现在用的是这个后面的方法进行释放的，内存没上升，说明达到释放的效果。程序运行也正常，但是昨天我在换了一台电脑运行就出现问题了，程序时间长了卡死。