//打开摄像头
private void btn_play_Click(object sender, EventArgs e)
{
if (!bPlayflag)
{
m_vCapture = new VideoCapture(CaptureDevice.Any);
if (!m_vCapture.IsOpened())
{
MessageBox.Show("摄像头打不开", "摄像头故障", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
m_vCapture.Set(CaptureProperty.FrameWidth, 640); //宽度
m_vCapture.Set(CaptureProperty.FrameHeight, 480); //高度
bPlayflag = true;
ThreadCam = new Thread(Play_Camera);
ThreadCam.Start();
pic_cam.Image = null;
btn_play.Text = "关闭摄像头";
}
else
{
bPlayflag = false;
ThreadCam.Abort();
m_vCapture.Release();
btn_play.Text = "打开摄像头";
}
}
static void Main(string[] args)
{
//size of tag is in meters and camera parameters are obtained from calibration
float tag_size = 0.1F;
float fx = 1200F;
float fy = 1400F;
double px = 817.143;
double py = 387.159;
//array of floats to carry values of image points (x and y * 4 points)
float[] ptsry = new float[8];
//initialize video capture from camera
var capt = new OpenCvSharp.VideoCapture();
capt.Open(0);
//window for displaying video
Window window = new Window("capture");
//main task; display video and find tags
using (Mat frame = new Mat())
{
//looping untill key is pressed
while (true)
{
//read from camera and show it
capt.Read(frame);
window.ShowImage(frame);
//detect tags and find how many and print the number
Apriltag ap = new Apriltag("canny", true, "tag16h5");
var current_tags = ap.detect(frame);
Console.WriteLine("Number of tags = " + current_tags.Count);
Console.WriteLine();
//sleep for 10 msec
System.Threading.Thread.Sleep(10);
//if a key is pressed, close the window and exit
if (Cv2.WaitKey(1) >= 0)
{
capt.Release();
Cv2.DestroyAllWindows();
break;
}
}
}
}
private async Task CaptureCamera(CancellationToken token)
{
if (capture == null)
{
capture = new cv.VideoCapture(0, cv.VideoCaptureAPIs.ANY);
}
capture.Open(0);
if (capture.IsOpened())
{
try
{
while (!token.IsCancellationRequested)
{
using MemoryStream memoryStream = capture.RetrieveMat().ToMemoryStream();
await Application.Current.Dispatcher.InvokeAsync(() =>
{
try
{
var imageSource = new BitmapImage();
imageSource.BeginInit();
imageSource.CacheOption = BitmapCacheOption.OnLoad;
imageSource.StreamSource = memoryStream;
imageSource.EndInit();
img_WebCam.Source = imageSource;
}catch (Exception e)
{
}
});
bitmapImage = new Bitmap(memoryStream);
//await ParseWebCamFrame(bitmapImage, token);
}
capture.Release();
}
catch (Exception e)
{
}
}
}
private async Task CaptureCamera(CancellationToken token)
{
if (capture == null)
{
capture = new OpenCvSharp.VideoCapture(CaptureDevice.DShow);
}
capture.Open(0);
m_capture.Start();
if (capture.IsOpened())
// if(m_capture.IsOpened)
{
while (!token.IsCancellationRequested)
{
using MemoryStream memoryStream = capture.RetrieveMat().Flip(FlipMode.Y).ToMemoryStream();
// using MemoryStream memoryStream = m_capture.QueryFrame()..RetrieveMat().Flip(FlipMode.Y).ToMemoryStream();
await Application.Current.Dispatcher.InvokeAsync(() =>
{
var imageSource = new BitmapImage();
imageSource.BeginInit();
imageSource.CacheOption = BitmapCacheOption.OnLoad;
imageSource.StreamSource = memoryStream;
imageSource.EndInit();
OpenCVSharpImageSource.Source = imageSource;
});
var bitmapImage = new Bitmap(memoryStream);
await ParseWebCamFrame(bitmapImage, token);
}
capture.Release();
}
}
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
released = true;
cap.Release();
cap.Dispose();
}
