public static Image <Bgr, byte> getAlignedImage(Image <Bgr, byte> image,
HomoTrans ht)
{
Image <Bgr, byte> result = new Image <Bgr, byte>(ht.resolution);
CvInvoke.WarpPerspective(image, result, ht.h**o, ht.resolution, Emgu.CV.CvEnum.Inter.Linear,
Emgu.CV.CvEnum.Warp.InverseMap, Emgu.CV.CvEnum.BorderType.Constant, new MCvScalar(0, 0, 0, 0));
return(result);
}
public static BulbPoint[] findFlicker(VideoCapture vc, HomoTrans h**o, int durationMs,
int leastFliker = 2, int threshold = 80, int erodeTimes = 2, bool debug = false)
{
Mat ele = CvInvoke.GetStructuringElement(Emgu.CV.CvEnum.ElementShape.Ellipse, new Size(3, 3), new Point(-1, -1));
int startTime = System.Environment.TickCount;
Mat pic1 = new Mat();
Mat pic2 = new Mat();
vc.Read(pic1);
vc.Read(pic2);
Mat diffPicAcc = new Mat();
do
{
Image <Bgr, byte> diffImg =
MarkerManager.getAlignedImage(pic1.ToImage <Bgr, byte>(), h**o).AbsDiff(
MarkerManager.getAlignedImage(pic2.ToImage <Bgr, byte>(), h**o));
CvInvoke.CvtColor(diffImg, diffImg, Emgu.CV.CvEnum.ColorConversion.Bgr2Hsv);
Image <Gray, byte> diffImgValue = diffImg[2].Clone();
for (int y = 0; y < diffImg.Height; y++)
{
for (int x = 0; x < diffImg.Width; x++)
{
if (diffImgValue.Data[y, x, 0] < threshold)
{
diffImgValue.Data[y, x, 0] = 0;
}
else
{
diffImgValue.Data[y, x, 0] = 1;
}
}
}
if (diffPicAcc.IsEmpty)
{
diffPicAcc.Create(diffImgValue.Rows, diffImgValue.Cols, Emgu.CV.CvEnum.DepthType.Cv8U, 1);
diffPicAcc.SetTo(new MCvScalar(0));
}
CvInvoke.Add(diffImgValue, diffPicAcc, diffPicAcc);
Mat t = pic1;
pic1 = pic2;
pic2 = t;
vc.Read(pic2);
} while (System.Environment.TickCount - startTime < durationMs);
Image <Gray, byte> diffPicAccI = diffPicAcc.ToImage <Gray, byte>();
Image <Gray, byte> diffPicAccDebug = null;
if (debug)
{
diffPicAccDebug = diffPicAcc.ToImage <Gray, byte>();
}
for (int y = 0; y < diffPicAccI.Height; y++)
{
for (int x = 0; x < diffPicAccI.Width; x++)
{
if (diffPicAccI.Data[y, x, 0] < leastFliker)
{
diffPicAccI.Data[y, x, 0] = 0;
}
else if (debug)
{
diffPicAccDebug.Data[y, x, 0] = 255;
}
}
}
if (debug)
{
CvInvoke.Imshow("diffImgAcc", diffPicAccDebug);
}
CvInvoke.MorphologyEx(diffPicAccI, diffPicAccI,
Emgu.CV.CvEnum.MorphOp.Erode, ele, new Point(-1, -1), erodeTimes, Emgu.CV.CvEnum.BorderType.Default, new MCvScalar(0));
CvInvoke.MorphologyEx(diffPicAccI, diffPicAccI,
Emgu.CV.CvEnum.MorphOp.Dilate, ele, new Point(-1, -1), erodeTimes + ERODE_ADDTIONAL_RETRIEVE_COUNT, Emgu.CV.CvEnum.BorderType.Default, new MCvScalar(0));
List <BulbPoint> result = new List <BulbPoint>();
for (int y = 0; y < diffPicAccI.Height; y++)
{
for (int x = 0; x < diffPicAccI.Width; x++)
{
if (diffPicAccI.Data[y, x, 0] != 0)
{
Mat ptsSet = new Mat();
double totalIntensity = hfsMarker(diffPicAccI, x, y, ptsSet, 0, 0);
int px = (int)(CvInvoke.Mean(ptsSet.Col(0)).V0);
int py = (int)(CvInvoke.Mean(ptsSet.Col(1)).V0);
int fTimes = (int)Math.Round(totalIntensity / ptsSet.Rows);
result.Add(new BulbPoint(new Point(px, py), h**o.resolution, 0, fTimes));
}
}
}
return(result.ToArray());
}
