大华相机采集类
class Camera
{
private IDevice m_dev;
List<IGrabbedRawData> m_frameList = new List<IGrabbedRawData>();
Thread renderThread = null;
bool m_bShowLoop = true;
Mutex m_mutex = new Mutex();
public Camera()
{
if (null == renderThread)
{
renderThread = new Thread(new ThreadStart(ShowThread));
renderThread.IsBackground = true;
renderThread.Start();
}
m_stopWatch.Start();
}
private void ShowThread()
{
while (m_bShowLoop)
{
if (m_frameList.Count == 0)
{
Thread.Sleep(10);
continue;
}
m_mutex.WaitOne();
IGrabbedRawData frame = m_frameList.ElementAt(0);
m_frameList.RemoveAt(0);
m_frameList.Clear();
m_mutex.ReleaseMutex();
GC.Collect();
if (false == isTimeToDisplay())
{
continue;
}
try
{
var bitmap = frame.ToBitmap(false);
}
catch
{
}
}
}
const int DEFAULT_INTERVAL = 40;
Stopwatch m_stopWatch = new Stopwatch();
private bool isTimeToDisplay()
{
m_stopWatch.Stop();
long m_lDisplayInterval = m_stopWatch.ElapsedMilliseconds;
if (m_lDisplayInterval <= DEFAULT_INTERVAL)
{
m_stopWatch.Start();
return false;
}
else
{
m_stopWatch.Reset();
m_stopWatch.Start();
return true;
}
}
private void OnCameraOpen(object sender, EventArgs e)
{
}
private void OnCameraClose(object sender, EventArgs e)
{
}
private void OnConnectLoss(object sender, EventArgs e)
{
m_dev.ShutdownGrab();
m_dev.Dispose();
m_dev = null;
}
private void OnImageGrabbed(Object sender, GrabbedEventArgs e)
{
m_mutex.WaitOne();
m_frameList.Add(e.GrabResult.Clone());
m_mutex.ReleaseMutex();
}
public string Open(string triggerSource)
{
string sRet = string.Empty;
try
{
List<IDeviceInfo> li = Enumerator.EnumerateDevices();
if (li.Count > 0)
{
m_dev = Enumerator.GetDeviceByIndex(0);
m_dev.CameraOpened += OnCameraOpen;
m_dev.ConnectionLost += OnConnectLoss;
m_dev.CameraClosed += OnCameraClose;
if (!m_dev.Open())
sRet = "打开相机失败";
m_dev.TriggerSet.Open(triggerSource);
using (IEnumParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImagePixelFormat])
{
p.SetValue("Mono8");
}
m_dev.StreamGrabber.SetBufferCount(8);
m_dev.StreamGrabber.ImageGrabbed += OnImageGrabbed;
if (!m_dev.GrabUsingGrabLoopThread())
sRet = "开启码流失败";
}
else
{
sRet = "未找到相机设备";
}
}
catch (Exception e)
{
sRet = e.Message;
}
return sRet;
}
public string Close()
{
string sRet = String.Empty;
1 try
{
if (m_dev == null)
{
sRet = "Device is invalid";
}
m_dev.StreamGrabber.ImageGrabbed -= OnImageGrabbed;
m_dev.ShutdownGrab();
m_dev.Close();
}
catch (Exception e)
{
sRet = e.Message;
}
return sRet;
}
public void OnClosed(EventArgs e)
{
if (m_dev != null)
{
m_dev.Dispose();
m_dev = null;
}
m_bShowLoop = false;
renderThread.Join();
}
public string SetTriggerMode(string value = "On")
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
using (IEnumParameter p = m_dev.ParameterCollection[ParametrizeNameSet.TriggerMode])
{
p.SetValue(value);
}
return "";
}
public string SetExposureTime(float value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinExposureTime();
double max = GetMaxExposureTime();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ExposureTime])
{
p.SetValue(value);
}
return "";
}
public string SetGainRaw(float value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinGainRaw();
double max = GetMaxGainRaw();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.GainRaw])
{
p.SetValue(value);
}
return "";
}
public string SetImageWidth(int value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinImageWidth();
double max = GetMaxImageWidth();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageWidth])
{
p.SetValue(value);
}
return "";
}
public string SetImageHeight(int value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinImageHeight();
double max = GetMaxImageHeight();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageHeight])
{
p.SetValue(value);
}
return "";
}
public string SetImageOffsetX(int value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinImageOffsetX();
double max = GetMaxImageOffsetX();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetX])
{
p.SetValue(value);
}
return "";
}
public string SetImageOffsetY(int value)
{
if (m_dev == null)
{
return "Device is invalid";
}
if (!m_dev.IsOpen)
{
return "相机未打开";
}
double min = GetMinImageOffsetY();
double max = GetMaxImageOffsetY();
if (value < min || value > max)
{
return string.Format("参数值不在范围内,min:{0},max:{1}", min, max);
}
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetY])
{
p.SetValue(value);
}
return "";
}
#region 获取相机参数的取值范围
public double GetMinExposureTime()
{
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ExposureTime])
{
return p.GetMinimum();
}
}
public double GetMaxExposureTime()
{
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ExposureTime])
{
return p.GetMaximum();
}
}
public double GetMinGainRaw()
{
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.GainRaw])
{
return p.GetMinimum();
}
}
public double GetMaxGainRaw()
{
using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.GainRaw])
{
return p.GetMaximum();
}
}
public long GetMinImageWidth()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageWidth])
{
return p.GetMinimum();
}
}
public long GetMaxImageWidth()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageWidth])
{
return p.GetMaximum();
}
}
public long GetMinImageHeight()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageHeight])
{
return p.GetMinimum();
}
}
public long GetMaxImageHeight()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageHeight])
{
return p.GetMaximum();
}
}
public long GetMinImageOffsetX()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetX])
{
return p.GetMinimum();
}
}
public long GetMaxImageOffsetX()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetX])
{
return p.GetMaximum();
}
}
public long GetMinImageOffsetY()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetY])
{
return p.GetMinimum();
}
}
public long GetMaxImageOffsetY()
{
using (IIntegraParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImageOffsetY])
{
return p.GetMaximum();
}
}
#endregion
}

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