public Bitmap SetEdgesCirlceROI(int X, int Y, double radius)
{
Bitmap bmp = new Bitmap(1280, 1024);
Emgu.CV.Image <Gray, byte> imgRoi = new Emgu.CV.Image <Gray, byte>(bmp);
imgRoi.SetZero();
Emgu.CV.Image <Gray, byte> imgCircleFilter = new Emgu.CV.Image <Gray, byte>(1280, 1024);
imgCircleFilter.SetZero();
PointF centerPoint = new PointF((float)X, (float)Y);
SizeF size = new SizeF((float)(radius * 2.0), (float)(radius * 2.0));
Ellipse circle = new Ellipse(centerPoint, size, 0.0f);
imgCircleFilter.Draw(circle, new Gray(255), -1, LineType.EightConnected);
imgEdgesROI = imgEdges.And(imgCircleFilter);
imgRoi = imgEdgesROI;
return(imgRoi.Bitmap);
}