public Mat RoiCropByPercent(Mat frame, double percentOfFace = 0.33)
{
double size = Math.Max(Parent.Width, Parent.Height) * percentOfFace;
return(MatTool.New(frame, new Vision.Rect(Parent.X + Center.X - size * 0.5, Parent.Y + Center.Y - size * 0.5, size, size), true));
}
public Mat Plot(ScreenProperties screen)
{
var errorList = new List <double>();
var errorMM = new List <double>();
var ptList = new List <Point>();
var ptDistList = new List <Point>();
var frameMargin = new Point(12, 12);
var frameSize = new Size(480, 480);
var frameBackSize = frameSize.Clone();
frameBackSize.Width += frameMargin.Y * 2;
frameBackSize.Height += frameMargin.Y * 2;
var frame = MatTool.New(frameBackSize, MatType.CV_8UC3);
using (Mat m = MatTool.New(frameSize, MatType.CV_8UC3))
{
m.DrawRectangle(new Rect(0, 0, m.Width, m.Height), Scalar.BgrWhite, -1);
foreach (var item in Data)
{
var pt = frameSize.Center;
var ptDist = pt.Clone();
var key3d = item.Key * (-1 / item.Key.Z);
var key = new Point(key3d.X, key3d.Y);
pt.X *= key.X;
pt.Y *= key.Y;
var gazeVec = item.Value.Face.GazeInfo.Vector;
ptDist.X *= gazeVec.X;
ptDist.Y *= gazeVec.Y;
pt += frameSize.Center;
ptDist += frameSize.Center;
ptList.Add(pt);
ptDistList.Add(ptDist);
var errorDiff = key - new Point(gazeVec.X, gazeVec.Y);
var error = Math.Sqrt(Math.Pow(errorDiff.X, 2) + Math.Pow(errorDiff.Y, 2));
errorList.Add(error);
var mmDist = item.Value.Face.LandmarkTransform.Z / item.Value.Face.UnitPerMM;
errorMM.Add(Math.Abs(screen.Origin.Z - mmDist) * error / 10);
}
var errorMax = errorList.Max();
var errorMin = errorList.Min();
var errorAvg = errorList.Average();
var errorMMAvg = errorMM.Average();
for (int i = 0; i < ptList.Count; i++)
{
var pt = ptList[i];
var ptDist = ptDistList[i];
var error = errorList[i];
var alpha = (error - errorMin) / (errorMax - errorMin);
var color = Scalar.Blend(Scalar.BgrBlue, 1 - alpha, Scalar.BgrRed, alpha);
m.DrawArrow(pt, ptDist, color, 1, LineTypes.AntiAlias, 0.15);
}
Core.Cv.DrawText(m,
$"Mean error: {errorAvg.ToString("0.000")}\n" +
$"Mean error(cm): {errorMMAvg.ToString("0.00")}\n" +
$"Mean error(degree): {(Math.Atan(errorAvg) / Math.PI * 180).ToString("0.00")}\n" +
$"Samples: {errorList.Count}",
new Point(10, 25), HersheyFonts.HersheyComplexSmall, 0.5, Scalar.BgrBlack, 1);
frame.DrawRectangle(new Rect(0, 0, frame.Width, frame.Height), new Scalar(64, 64, 64), -1);
Core.Cv.DrawMatAlpha(frame, m, frameMargin);
}
return(frame);
}
public Mat ROI(Mat frame)
{
return(MatTool.New(frame, new Rect(Parent.X + X, Parent.Y + Y, Width, Height), true));
}