public static Point FindMouseNoseTip(IEnumerable <Point> points, IEnumerable <Point> contourPoints)
{
List <Point> headPoints = points.ToList();
List <Point> allContourPoints = contourPoints.ToList();
StraightLine vectorPointsLine = new StraightLine(headPoints[1], headPoints[3]);
PointF closestPointToNose;
double distance = vectorPointsLine.FindDistanceToSegment(headPoints[2], out closestPointToNose);
Point closestIntPoint = new Point((int)closestPointToNose.X, (int)closestPointToNose.Y);
StraightLine direction = new StraightLine(closestIntPoint, headPoints[2]);
float targetExtensionDistance = 3;
Point targetLinePoint1 = new Point((int)(vectorPointsLine.StartPoint.X + (direction.NormalizedVector * distance * targetExtensionDistance).X), (int)(vectorPointsLine.StartPoint.Y + (direction.NormalizedVector * distance * targetExtensionDistance).Y));
Point targetLinePoint2 = new Point((int)(vectorPointsLine.EndPoint.X + (direction.NormalizedVector * distance * targetExtensionDistance).X), (int)(vectorPointsLine.EndPoint.Y + (direction.NormalizedVector * distance * targetExtensionDistance).Y));
StraightLine targetLine = new StraightLine(targetLinePoint1, targetLinePoint2);
int numberOfTargets = 5;
float offset = targetLine.GetMagnitude() / numberOfTargets;
float finalDist = 10000;
Point nosePoint = new Point();
for (float currentTargetLength = 0; currentTargetLength <= targetLine.GetMagnitude(); currentTargetLength += offset)
{
Point currentTargetPoint = targetLine.DistanceFromStart(currentTargetLength);
foreach (Point point in allContourPoints)
{
float dist = currentTargetPoint.Distance(point);
if (dist < finalDist)
{
finalDist = dist;
nosePoint = point;
}
}
}
return(nosePoint);
}
public static AutomatedRodentTracker.Services.RBSK.RBSK GetStandardMouseRules()
{
RBSKRules mouseRules = new RBSKRules();
//Always make sure the number of parameters is correct first
mouseRules.AddRule(new RBSKRule((x, s, b) =>
{
if (x.Length != s.NumberOfPoints)
{
return(false);
}
return(true);
}));
//Rules regarding the points layout
mouseRules.AddRule(new RBSKRule((x, s, b) =>
{
PointF nosePoint = x[2];
PointF[] vectorPoints = { x[1], x[3] };
PointF[] rearPoints = { x[0], x[4] };
double gapDistance = s.GapDistance;
//Calculate target areas
double gapDistanceSquared = gapDistance * gapDistance;
double targetHeadArea = 0.433f * gapDistanceSquared;
//float targetArea = gapDistanceSquared + targetHeadArea;
//Check total area
//float area = MathExtension.PolygonArea(x);
//if (area < targetArea / 1.5)
//{
// return false;
//}
//check head area
float headArea = MathExtension.PolygonArea(new[] { vectorPoints[0], nosePoint, vectorPoints[1] });
if (headArea < targetHeadArea / 2)
{
return(false);
}
//Check which side the points lie on
PointSideVector result = MathExtension.FindSide(vectorPoints[0], vectorPoints[1], nosePoint);
if (result == PointSideVector.On)
{
return(false);
}
PointSideVector rearResult1 = MathExtension.FindSide(vectorPoints[0], vectorPoints[1], rearPoints[0]);
PointSideVector rearResult2 = MathExtension.FindSide(vectorPoints[0], vectorPoints[1], rearPoints[1]);
//If the points are on the line then continue
if (rearResult1 == PointSideVector.On || rearResult2 == PointSideVector.On)
{
return(false);
}
//Make sure the rear points are on the opposite side to the nose point
if (!(rearResult1 == rearResult2 && rearResult1 != result))
{
return(false);
}
//Check rear points are correctly aligned with the center line
PointF vectorMidPoint = new PointF((vectorPoints[0].X + vectorPoints[1].X) / 2, (vectorPoints[0].Y + vectorPoints[1].Y) / 2);
rearResult1 = MathExtension.FindSide(nosePoint, vectorMidPoint, rearPoints[0]);
rearResult2 = MathExtension.FindSide(nosePoint, vectorMidPoint, rearPoints[1]);
if (rearResult1 == rearResult2)
{
return(false);
}
StraightLine centerLine = new StraightLine(nosePoint, vectorMidPoint);
PointF targetRearMidPoint = centerLine.DistanceFromEndFloat(-s.GapDistance);
centerLine = new StraightLine(nosePoint, targetRearMidPoint);
double rearDist1 = centerLine.FindDistanceToSegment(rearPoints[0]);
if (rearDist1 < s.GapDistance / 3)
{
return(false);
}
rearDist1 = centerLine.FindDistanceToSegment(rearPoints[1]);
if (rearDist1 < s.GapDistance / 3)
{
return(false);
}
//The points are correctly aligned, make sure it's covering black pixels
int blackCounter = 0;
int whiteCounter = 0;
StraightLine line = new StraightLine(vectorPoints[0], vectorPoints[1]);
double distance = line.GetMagnitude();
float increment = (float)distance / 10.0f;
for (int j = 1; j < 9; j++)
{
Point pointToCheck = line.DistanceFromStart(j * increment);
if (b[pointToCheck].Intensity <= 120)
{
blackCounter++;
}
else
{
whiteCounter++;
}
}
if (whiteCounter > blackCounter)
{
return(false);
}
//Don't want the distance to be too great between the vector points
//double distance = vectorPoints[0].Distance(vectorPoints[1]);
//double distance = Math.Sqrt((vectorPoints[1].X - vectorPoints[0].X) + (vectorPoints[1].Y - vectorPoints[0].Y));
if (distance > 1.4f * gapDistance)
{
return(false);
}
//Rear distance must fall between a certain range
double rearDistance = rearPoints[0].Distance(rearPoints[1]);
if (rearDistance > 2.5f * gapDistance)
{
return(false);
}
if (rearDistance < 1.2 * gapDistance)
{
return(false);
}
return(true);
}));
RBSKRules advancedRules = new RBSKRules();
advancedRules.AddRule(new RBSKRule((x, s, b) =>
{
Point intNosePoint = x[2].ToPoint();
Point intVectorPoint1 = x[1].ToPoint();
Point intVectorPoint2 = x[3].ToPoint();
Image <Gray, Byte> mask = new Image <Gray, byte>(b.Cols, b.Rows, new Gray(0));
mask.FillConvexPoly(new[] { intNosePoint, intVectorPoint1, intVectorPoint2 }, new Gray(255), LineType.FourConnected);
double avgIntensity = b.GetAverage(mask).Intensity;
if (avgIntensity > 10)
{
return(false);
}
return(true);
}));
//Create probability funcation
RBSKProbability rbskProbability = new RBSKProbability((p, s) =>
{
PointF[] points = p;
if (points.Length != 5)
{
return(0);
}
//float gapDistanceSquared = s.GapDistance*s.GapDistance;
StraightLine line = new StraightLine(points[1], points[3]);
//Need to normalize the line
double targetNoseDistance = 0.866d * s.GapDistance;
double actualNoseDistance = line.FindDistanceToSegment(points[2]);
double noseProbability;
if (targetNoseDistance > actualNoseDistance)
{
noseProbability = actualNoseDistance / targetNoseDistance;
}
else
{
noseProbability = targetNoseDistance / actualNoseDistance;
}
//float targetHeadArea = 0.433f * gapDistanceSquared;
//float targetHeadArea = (float)MathExtension.PolygonArea(new[]
//{
// new Point(0, 0),
// new Point((int)s.GapDistance, 0),
// new Point((int)(s.GapDistance/2), (int)(s.GapDistance*0.866f)),
//});
//float actualHeadArea = MathExtension.PolygonArea(new[]
//{
// points[1], points[2], points[3]
//});
//float areaProbability;
//if (targetHeadArea > actualHeadArea)
//{
// areaProbability = actualHeadArea / targetHeadArea;
//}
//else
//{
// areaProbability = targetHeadArea / actualHeadArea;
//}
return(noseProbability);// * areaProbability;
});
return(new AutomatedRodentTracker.Services.RBSK.RBSK(mouseRules, advancedRules, new RBSKSettings(5), rbskProbability));
}