private void CameraGrabberFrameCallback(IntPtr Grabber, IntPtr pFrameBuffer, ref tSdkFrameHead pFrameHead, IntPtr Context)
{
int w = pFrameHead.iWidth;
int h = pFrameHead.iHeight;
bool gray = (pFrameHead.uiMediaType == (uint)emImageFormat.CAMERA_MEDIA_TYPE_MONO8);
Bitmap ImageDisp = new Bitmap(w, h,
gray ? w : w * 3,
gray ? PixelFormat.Format8bppIndexed : PixelFormat.Format24bppRgb,
pFrameBuffer);
// 如果是灰度图要设置调色板
if (gray)
{
ImageDisp.Palette = m_GrayPal;
}
using (var stream = new MemoryStream())
{
ImageDisp.Save(stream, ImageFormat.Bmp);
App.Current.Dispatcher.InvokeAsync(new Action(() =>
{
SetPreviewImage(stream);
}));
}
if (DetectFlag)
{
Image.Bitmap = ImageDisp;
ImageQueue.Enqueue(Image);
CapCount++;
}
}
// thread safe wrt. Pop
internal void Push(Emgu.CV.UMat image)
{
if (image != null)
{
if (ImageQueue.Count < Nthreads_ * 2)
{
ImageQueue.Enqueue(image);
}
else
{
//we are reaching into memory limits, so dispose it to prevent
//exhausting the ram
image.Dispose();
}
}
}
private void Hooks_DispatcherInactive(object sender, EventArgs e)
{
using (Mat source = capture.QueryFrame())
{
var frame = new Mat();
CvInvoke.Resize(source, frame, ImageSize);
if (frame != null && DetectFlag && !frame.IsEmpty)
{
Image <Bgr, Byte> Image = new Image <Bgr, Byte>(ImageSize);
Image.Bitmap = (Bitmap)frame.Bitmap.Clone();
ImageQueue.Enqueue(Image);
using (var stream = new MemoryStream())
{
frame.Bitmap.Save(stream, ImageFormat.Png);
SetPreviewImage(stream);
}
}
}
}