c# 大华相机采集类

概述1 class Camera // 大华相机类 2 { 3 private IDevice m_dev; /* 设备对象 */ 4 List<IGrabbedRawData> m_frameList = new List<IGrabbedRawData>(); /* 图像缓存列表 */ 5 Thread rende

  1  class Camera // 大华相机类  2     {  3         private IDevice m_dev; /* 设备对象 */  4         List<IGrabbedRawData> m_frameList = new List<IGrabbedRawData>();  /* 图像缓存列表 */  5         Thread renderThread = null;         /* 显示线程  */  6         bool m_bShowLoop = true;            /* 线程控制变量 */  7         Mutex m_mutex = new Mutex();        /* 锁，保证多线程安全 */  8         // public event Action<HObject> NewImage;  // 图像显示事件  9  10         public Camera() 11         { 12             if (null == renderThread) 13             { 14                 renderThread = new Thread(new ThreadStart(ShowThread)); 15                 renderThread.IsBackground = true; 16                 renderThread.Start(); 17             } 18             m_stopWatch.Start();//时间计时开始 19         } 20  21         /* 转码显示线程 */ 22         private voID ShowThread() 23         { 24             while (m_bShowLoop)//线程控制变量为True 25             { 26                 if (m_frameList.Count == 0) //图像缓存列表 27                 { 28                     Thread.Sleep(10); 29                     continue; 30                 } 31  32                 /* 图像队列取最新帧 */ 33                 m_mutex.WaitOne();//阻止当前线程，直到当前收到信号 34                 IGrabbedRawData frame = m_frameList.ElementAt(0);//返回队列中指定索引处的元素 35                 m_frameList.RemoveAt(0); 36                 m_frameList.Clear(); 37                 m_mutex.ReleaseMutex(); 38  39                 /* 主动调用回收垃圾 */ 40                 GC.Collect(); 41  42                 /* 控制显示最高帧率为25FPS */ 43                 if (false == isTimetodisplay()) 44                 { 45                     continue; 46                 } 47  48                 try 49                 { 50                     /* 图像转码成bitmap图像 */ 51                     var bitmap = frame.ToBitmap(false); 52                      53                     // 在这里使用采集的图像 54                     //if (NewImage != null) 55                     //{ 56                     //    NewImage(image); 57                     //} 58                 } 59                 catch 60                 { 61                      62                 } 63             } 64         } 65  66         const int DEFAulT_INTERVAL = 40;//默认的时间间隔 67         Stopwatch m_stopWatch = new Stopwatch();    /* 时间统计器 */ 68  69         /* 判断是否应该做显示 *** 作 */ 70         private bool isTimetodisplay() 71         { 72             m_stopWatch.Stop(); 73             long m_ldisplayInterval = m_stopWatch.ElapsedMilliseconds;//获取实例测量出的总时间 74             if (m_ldisplayInterval <= DEFAulT_INTERVAL) 75             { 76                 m_stopWatch.Start(); 77                 return false; 78             } 79             else 80             { 81                 m_stopWatch.reset(); 82                 m_stopWatch.Start(); 83                 return true; 84             } 85         } 86   87         /* 相机打开回调 */ 88         private voID OnCameraOpen(object sender,EventArgs e) 89         { 90             // 在这里记录相机已打开 91         } 92  93         /* 相机关闭回调 */ 94         private voID OnCameraClose(object sender,EventArgs e) 95         { 96             // 在这里记录相机已关闭 97         } 98  99         /* 相机丢失回调 */100         private voID OnConnectLoss(object sender,EventArgs e)101         {102             m_dev.ShutdownGrab();103             m_dev.dispose();104             m_dev = null;105         }106 107         /* 码流数据回调 */108         private voID OnImageGrabbed(Object sender,GrabbedEventArgs e)109         {110             m_mutex.WaitOne();//    m_mutex锁，保证多线程安全111             m_frameList.Add(e.GrabResult.Clone());/* 图像缓存列表 */112             m_mutex.ReleaseMutex();113         }114 115         /// <summary>116         /// 打开相机117         /// </summary>118         /// <returns>返回字符串为空表示打开成功，不为空表示打开失败，字符串内容为异常信息</returns> 119         /// <param name="triggerSource">触发源选择 软触发或外触发</param>120         /// <returns></returns>121         public string Open(string triggerSource)122         {123             string sRet = string.Empty;124             try125             {126                 /* 设备搜索 */127                 List<IDeviceInfo> li = Enumerator.EnumerateDevices();128                 if (li.Count > 0)129                 {130                     /* 获取搜索到的第一个设备 */131                     m_dev = Enumerator.GetDeviceByIndex(0);132 133                     /* 注册链接事件 */134                     m_dev.CameraOpened += OnCameraOpen;135                     m_dev.ConnectionLost += OnConnectLoss;136                     m_dev.CameraClosed += OnCameraClose;137 138                     /* 打开设备 */139                     if (!m_dev.open())140                         sRet = "打开相机失败";141 142                     /* 设置TriggerSource 软触发还是外触发*/143                     m_dev.TriggerSet.Open(triggerSource);144                    145                     /* 设置图像格式 */146                     using (IEnumParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImagePixelFormat])147                     {148                         p.SetValue("Mono8");149                     }150         151                     /* 设置缓存个数为8（默认值为16） */152                     m_dev.StreamGrabber.SetBufferCount(8);153 154                     /* 注册码流回调事件 */155                     m_dev.StreamGrabber.ImageGrabbed += OnImageGrabbed;156 157                     /* 开启码流 */158                     if (!m_dev.GrabUsingGrabLoopThread())159                         sRet = "开启码流失败";160                 }161                 else162                 {163                     sRet = "未找到相机设备";164                 }165             }166             catch (Exception e)167             {168                 sRet = e.Message;169             }170             return sRet;171         }172 173         /// <summary>174         /// 关闭相机175         /// </summary>176         /// <returns>返回字符串为空表示关闭成功，不为空表示关闭失败，字符串内容为异常信息</returns>177         public string Close()178         {179             string sRet = String.Empty;180             try181             {182                 if (m_dev == null)183                 {184                     sRet = "Device is invalID";185                 }186 187                 m_dev.StreamGrabber.ImageGrabbed -= OnImageGrabbed;         /* 反注册回调 */188                 m_dev.ShutdownGrab();                                       /* 停止码流 */189                 m_dev.Close();                                              /* 关闭相机 */190             }191             catch (Exception e)192             {193                 sRet = e.Message;194             }195             return sRet;196         }197 198         /* 窗口关闭 */199         public voID OnClosed(EventArgs e)200         {201             if (m_dev != null)202             {203                 m_dev.dispose();204                 m_dev = null;205             }206 207             m_bShowLoop = false;208             renderThread.Join();209         }210         /// <summary>211         /// 设置触发模式 软触发下设置On后自由拉流（连续触发）Off（单次触发）212         /// </summary>213         /// <param name="value"></param>214         public string SetTriggerMode(string value="On")215         {216             if (m_dev == null)217             {218                 return "Device is invalID";219             }220             if (!m_dev.IsOpen)221             {222                 return "相机未打开";223             }224             using (IEnumParameter p = m_dev.ParameterCollection[ParametrizenameSet.TriggerMode])225             {226                 p.SetValue(value);227             }228             return "";229         }230         /// <summary>231         /// 设置曝光232         /// </summary>233         /// <param name="value"></param>234         public string SetExposureTime(float value)235         {236             if (m_dev == null)237             {238                 return "Device is invalID";239             }240             if (!m_dev.IsOpen)241             {242                 return "相机未打开";243             }244             double min = GetminexposureTime();245             double max = GetMaxExposureTime();246             if (value < min || value > max)247             {248                 return string.Format("参数值不在范围内，min:{0}，max:{1}",min,max);249             }250             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.ExposureTime])251             {252                 p.SetValue(value);253             }254             return "";255         }256         /// <summary>257         /// 设置增益258         /// </summary>259         /// <param name="value"></param>260         public string SetGainRaw(float value)261         {262             if (m_dev == null)263             {264                 return "Device is invalID";265             }266             if (!m_dev.IsOpen)267             {268                 return "相机未打开";269             }270             double min = GetMinGainRaw();271             double max = GetMaxGainRaw();272             if (value < min || value > max)273             {274                 return string.Format("参数值不在范围内，min:{0}，max:{1}",max);275             }276             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.GainRaw])277             {278                 p.SetValue(value);279             }280             return "";281         }282         /// <summary>283         /// 设置图像的宽度284         /// </summary>285         /// <param name="value"></param>286         /// <returns></returns>287         public string SetimageWIDth(int value)288         {289             if (m_dev == null)290             {291                 return "Device is invalID";292             }293             if (!m_dev.IsOpen)294             {295                 return "相机未打开";296             }297             double min = GetMinImageWIDth();298             double max = GetMaxImageWIDth();299             if (value < min || value > max)300             {301                 return string.Format("参数值不在范围内，min:{0}，max:{1}",max);302             }303             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageWIDth])304             {305                 p.SetValue(value);306             }307             return "";308         }309         /// <summary>310         /// 设置图像的宽度311         /// </summary>312         /// <param name="value"></param>313         /// <returns></returns>314         public string SetimageHeight(int value)315         {316             if (m_dev == null)317             {318                 return "Device is invalID";319             }320             if (!m_dev.IsOpen)321             {322                 return "相机未打开";323             }324             double min = GetMinImageHeight();325             double max = GetMaxImageHeight();326             if (value < min || value > max)327             {328                 return string.Format("参数值不在范围内，min:{0}，max:{1}",max);329             }330             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageHeight])331             {332                 p.SetValue(value);333             }334             return "";335         }336         /// <summary>337         /// 设置图像偏移X338         /// </summary>339         /// <param name="value"></param>340         /// <returns></returns>341         public string SetimageOffsetX(int value)342         {343             if (m_dev == null)344             {345                 return "Device is invalID";346             }347             if (!m_dev.IsOpen)348             {349                 return "相机未打开";350             }351             double min = GetMinImageOffsetX();352             double max = GetMaxImageOffsetX();353             if (value < min || value > max)354             {355                 return string.Format("参数值不在范围内，min:{0}，max:{1}",max);356             }357             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetX])358             {359                 p.SetValue(value);360             }361             return "";362         }363         /// <summary>364         /// 设置图像偏移Y365         /// </summary>366         /// <param name="value"></param>367         /// <returns></returns>368         public string SetimageOffsetY(int value)369         {370             if (m_dev == null)371             {372                 return "Device is invalID";373             }374             if (!m_dev.IsOpen)375             {376                 return "相机未打开";377             }378             double min = GetMinImageOffsetY();379             double max = GetMaxImageOffsetY();380             if (value < min || value > max)381             {382                 return string.Format("参数值不在范围内，min:{0}，max:{1}",max);383             }384             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetY])385             {386                 p.SetValue(value);387             }388             return "";389         }390 391         #region 获取相机参数的取值范围392         public double GetminexposureTime()393         {394             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.ExposureTime])395             {396                 return p.GetMinimum();397             }398         }399         public double GetMaxExposureTime()400         {401             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.ExposureTime])402             {403                 return p.GetMaximum();404             }405         }406         public double GetMinGainRaw()407         {408             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.GainRaw])409             {410                 return p.GetMinimum();411             }412         }413         public double GetMaxGainRaw()414         {415             using (IfloatParameter p = m_dev.ParameterCollection[ParametrizenameSet.GainRaw])416             {417                 return p.GetMaximum();418             }419         }420         public long GetMinImageWIDth()421         {422             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageWIDth])423             {424                 return p.GetMinimum();425             }426         }427         public long GetMaxImageWIDth()428         {429             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageWIDth])430             {431                 return p.GetMaximum();432             }433         }434         public long GetMinImageHeight()435         {436             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageHeight])437             {438                 return p.GetMinimum();439             }440         }441         public long GetMaxImageHeight()442         {443             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageHeight])444             {445                 return p.GetMaximum();446             }447         }448         public long GetMinImageOffsetX()449         {450             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetX])451             {452                 return p.GetMinimum();453             }454         }455         public long GetMaxImageOffsetX()456         {457             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetX])458             {459                 return p.GetMaximum();460             }461         }462         public long GetMinImageOffsetY()463         {464             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetY])465             {466                 return p.GetMinimum();467             }468         }469         public long GetMaxImageOffsetY()470         {471             using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizenameSet.ImageOffsetY])472             {473                 return p.GetMaximum();474             }475         }476         #endregion477 478         /// <summary>479         /// bitmap图像转HObject480         /// </summary>481         /// <param name="bmp"></param>482         /// <returns></returns>483         //private HObject Bitmap2HObjectBpp24(Bitmap bmp)484         //{485         //    HObject Hobj;486         //    HOperatorSet.GenEmptyObj(out Hobj);487         //    try488         //    {489         //        Rectangle rect = new Rectangle(0,bmp.WIDth,bmp.Height);490 491         //        BitmapData srcBmpData = bmp.LockBits(rect,ImageLockMode.Readonly,PixelFormat.Format24bppRgb);492         //        HOperatorSet.GenImageInterleaved(out Hobj,srcBmpData.Scan0,"bgr",bmp.Height,"byte",-1,0);493         //        bmp.UnlockBits(srcBmpData);494         //    }495         //    catch (Exception e)496         //    {497 498         //    }499         //    return Hobj;500         //}501     }

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