| public Set ( CaptureProperty propertyId, double value ) : int | ||
| propertyId | CaptureProperty | property identifier. |
| value | double | value of the property. |
| return | int | |
public void Run()
{
var capture = new VideoCapture();
capture.Set(CaptureProperty.FrameWidth, 640);
capture.Set(CaptureProperty.FrameHeight, 480);
capture.Open(-1);
if (!capture.IsOpened())
throw new Exception("capture initialization failed");
var fs = FrameSource.CreateCameraSource(-1);
var sr = SuperResolution.CreateBTVL1();
sr.SetInput(fs);
using (var normalWindow = new Window("normal"))
using (var srWindow = new Window("super resolution"))
{
var normalFrame = new Mat();
var srFrame = new Mat();
while (true)
{
capture.Read(normalFrame);
sr.NextFrame(srFrame);
if (normalFrame.Empty() || srFrame.Empty())
break;
normalWindow.ShowImage(normalFrame);
srWindow.ShowImage(srFrame);
Cv2.WaitKey(100);
}
}
}
public OpencvSource(string cam_or_url)
{
MAssert.Check(cam_or_url != string.Empty);
// check if cam_or_url is number
bool stream = false;
for (int i = 0; i < cam_or_url.Length; ++i)
{
stream = stream ||
(cam_or_url[i] < '0') ||
(cam_or_url[i] > '9');
}
if (stream)
{
// open stream
Console.WriteLine("opening stream '{0}'", cam_or_url);
capturer = new OpenCvSharp.VideoCapture(cam_or_url);
}
else
{
// convert to integer
int cam_id = Convert.ToInt32(cam_or_url, 10);
MAssert.Check(cam_id >= 0, "wrong webcam id");
// open vebcam
Console.WriteLine("opening webcam {0}", cam_id);
capturer = new OpenCvSharp.VideoCapture(cam_id);
MAssert.Check(capturer.IsOpened(), "webcam not opened");
// set resolution
capturer.Set(OpenCvSharp.CaptureProperty.FrameWidth, 1280);
capturer.Set(OpenCvSharp.CaptureProperty.FrameHeight, 720);
MAssert.Check(capturer.IsOpened(), "webcam not opened");
}
// sometimes first few frames can be empty even if camera is good
// so skip few frames
OpenCvSharp.Mat frame;
for (int i = 0; i < 10; ++i)
{
frame = capturer.RetrieveMat();
}
// check first two frames
OpenCvSharp.Mat image1 = new OpenCvSharp.Mat(), image2 = new OpenCvSharp.Mat();
capturer.Read(image1);
capturer.Read(image2);
Console.WriteLine("image1 size: {0}", image1.Size());
Console.WriteLine("image1 size: {0}", image2.Size());
MAssert.Check(
!image1.Empty() &&
!image2.Empty() &&
image1.Size() == image2.Size() &&
image1.Type() == OpenCvSharp.MatType.CV_8UC3 &&
image2.Type() == OpenCvSharp.MatType.CV_8UC3,
"error opening webcam or stream");
}
private void timer1_Tick(object sender, EventArgs e)
{
if (cap == null || pause)
{
return;
}
if (forwTo)
{
var ofps = cap.Get(5);//5 fps
forwTo = false;
var frm = cap.Get(7);//7 frame count
var secs = (frm / ofps) * 1000;
cap.Set(0, forwPosPercetange * secs);//posmsec 0
}
if (oneFrameStep && oneFrameStepDir == -1)
{
var pf = cap.Get(1);//1 posframes
cap.Set(1, Math.Max(0, pf - 2));
}
if (oneFrameStep)
{
pause = true; oneFrameStep = false;
}
Mat mat = new Mat();
cap.Read(mat);
pictureBox1.Image = BitmapConverter.ToBitmap(mat);
}
//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";
}
}
