// Close the camera.
static void CameraClose()
{
Thread.Sleep(1000);
// Unsetup event channel.
Pv.AttrUint32Set(GCamera.Handle, "EventsEnable1", 0);
Pv.CameraEventCallbackUnRegister(GCamera.Handle, EventDone);
// Clear the queue.
Console.WriteLine("Clearing the queue...");
Pv.CaptureQueueClear(GCamera.Handle);
// close the camera
Console.WriteLine("The camera is now closed.");
Pv.CameraClose(GCamera.Handle);
}
public static int LuminanceAdjust(ref tCamera Camera, double mean)
{
int result = 0;
if (mean < lowIlluminance)
{
result = -1;
}
if (mean > highIlluminance)
{
result = 1;
}
if (result * lastStatus == -1)//如果上一级过暗，此级过亮（或反之）
{
if (gain == 0)
{
//exposuretime = (exposuretime + lastExposuretime) / 2;
if ((int)(exposuretime * scale * 0.5) > 0)
{
scale *= 0.5;
}
}
else
{
result = 0;//增益为整数，无法调整，直接不进行调整
}
}
if (result == -1)
{
//低照度情况
isNoon = false;
//if (frame<=200)
{
//自动增加曝光时间或增益来调整图像亮度
if (exposuretime >= 40000)
{
exposuretime = 40000;
if (gain < 10)
{
gain++;
}
else
{
gain = 10;
}
}
else if (exposuretime <= 10)
{
exposuretime = 10;
}
else if (10000 <= exposuretime && exposuretime < 40000)
{
exposuretime = exposuretime + (uint)(10000 * scale);
gain = 0;
}
else if (1000 <= exposuretime && exposuretime < 10000)
{
exposuretime = exposuretime + (uint)(1000 * scale);
gain = 0;
}
else if (exposuretime >= 100 && exposuretime < 1000)
{
exposuretime = exposuretime + (uint)(100 * scale);
gain = 0;
}
else if (exposuretime >= 10 && exposuretime < 100)
{
exposuretime = exposuretime + (uint)(10 * scale);
gain = 0;
}
}
if (exposuretime == 40000 && gain == 10)
{
//当曝光时间和增益调整到最大值后，对低照度图像进行非线性变换调整图像质量
if (isNight == false)
{
isNight = true;
}
else
{
result = 0;
}
}
}
else if (result == 1)
{
//强光照情况
isNight = false;
//if (frame<=200)
{
//自动降低曝光时间和增益来降低图像亮度
if (gain > 0)
{
gain = 0;
}
else
{
if (exposuretime > 40000)
{
exposuretime = 40000;
}
else if (exposuretime <= 10)
{
exposuretime = 10;
}
else if (10000 < exposuretime && exposuretime <= 40000)
{
exposuretime = exposuretime - (uint)(10000 * scale);
}
else if (1000 < exposuretime && exposuretime <= 10000)
{
exposuretime = exposuretime - (uint)(1000 * scale);
}
else if (exposuretime > 100 && exposuretime <= 1000)
{
exposuretime = exposuretime - (uint)(100 * scale);
}
else if (exposuretime > 10 && exposuretime <= 100)
{
exposuretime = exposuretime - (uint)(10 * scale);
}
}
}
if (exposuretime == 10 && gain == 0)
{
//当无法对曝光时间和增益进行调整时对图像进行gamma变换来调整图像亮度
if (isNoon == false)
{
isNoon = true;
}
else
{
result = 0;
}
}
}
else if (mean < highIlluminance && mean >= lowIlluminance)
{
//正常光照情况，不对图像进行任何处理
}
if (result != 0)
{
Pv.AttrUint32Set(Camera.Handle, "ExposureValue", exposuretime);
Pv.AttrUint32Set(Camera.Handle, "GainValue", gain);
}
lastStatus = result;
Console.WriteLine("Brightness: {0}, ExposureValue: {1}, GainValue: {2}", mean, exposuretime, gain);
return(result);
}
// Setup the camera up for streaming.
static bool CameraStart()
{
tFrameCallback lFrameCB = new tFrameCallback(FrameDoneCB);
tCameraEventCallback lEventCB = new tCameraEventCallback(EventDone);
UInt32 FrameSize = 0;
IntPtr Context = IntPtr.Zero;
if (Pv.AttrExists(GCamera.Handle, "EventsEnable1") == tErr.eErrNotFound)
{
Console.WriteLine("This camera does not support event notifications.");
return(false);
}
// Adjust packet size for optimal performance.
Pv.CaptureAdjustPacketSize(GCamera.Handle, 8228);
// Determines how big the frame buffers should be.
if (Pv.AttrUint32Get(GCamera.Handle, "TotalBytesPerFrame", ref FrameSize) == 0)
{
tFrame Frame = new tFrame();
byte[] Buffer = new byte[FrameSize];
GCHandle pBuffer = GCHandle.Alloc(Buffer, GCHandleType.Pinned);
// Set the frame's fields.
// Handle to the Camera.
Frame.Context.Field0 = new IntPtr(GCamera.Handle);
// Address of the pinned object.
Frame.ImageBuffer = pBuffer.AddrOfPinnedObject();
// Buffer size.
Frame.ImageBufferSize = FrameSize;
// Setup the event channel.
Pv.AttrUint32Set(GCamera.Handle, "EventsEnable1", 0);
Pv.AttrEnumSet(GCamera.Handle, "EventSelector", "AcquisitionStart");
Pv.AttrEnumSet(GCamera.Handle, "EventNotification", "On");
Pv.AttrEnumSet(GCamera.Handle, "EventSelector", "AcquisitionEnd");
Pv.AttrEnumSet(GCamera.Handle, "EventNotification", "On");
Pv.AttrEnumSet(GCamera.Handle, "EventSelector", "FrameTrigger");
Pv.AttrEnumSet(GCamera.Handle, "EventNotification", "On");
if (Pv.CameraEventCallbackRegister(GCamera.Handle, lEventCB, Context) != tErr.eErrSuccess)
{
Console.WriteLine("There was an error accessing the driver.");
return(false);
}
// Start the capture mode.
if (Pv.CaptureStart(GCamera.Handle) == 0)
{
if (Pv.AttrFloat32Set(GCamera.Handle, "FrameRate", 5) == 0)
{
// Set the camera in continuous acquisition mode,and in "Freerun".
if (Pv.AttrEnumSet(GCamera.Handle, "FrameStartTriggerMode", "FixedRate") == 0)
{
// Set the acquisition mode into continuous.
if (Pv.CommandRun(GCamera.Handle, "AcquisitionStart") != 0)
{
// If that fails, reset the camera to non-capture mode.
Pv.CaptureEnd(GCamera.Handle);
Console.WriteLine("Failed to start.");
return(false);
}
else
{
// Pin down a copy of the frame structure.
GCHandle pFrame = GCHandle.Alloc(Frame, GCHandleType.Pinned);
// Enqueue the frame.
Pv.CaptureQueueFrame(GCamera.Handle, pFrame.AddrOfPinnedObject(), lFrameCB);
return(true);
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}
else
{
return(false);
}
}