private double MatchRidgeCounts(JYMtiaDescriptor target)
{
double diff0 = Math.Abs(target.ridgeCount0 - ridgeCount0);
double diff1 = Math.Abs(target.ridgeCount1 - ridgeCount1);
return(3 * (Math.Pow(diff0, 2) + Math.Pow(diff1, 2)));
}
private double MatchBetaAngles(JYMtiaDescriptor target)
{
double diff0 = Angle.DifferencePi(target.beta0, beta0);
double diff1 = Angle.DifferencePi(target.beta1, beta1);
return(54 * (Math.Pow(diff0, 2) + Math.Pow(diff1, 2)) / Math.PI);
}
private double MatchDistances(JYMtiaDescriptor target)
{
double diff0 = Math.Abs(target.dist0 - dist0);
double diff1 = Math.Abs(target.dist1 - dist1);
return(diff0 + diff1);
}
private double MatchByType(JYMtiaDescriptor target)
{
int diff0 = target.MainMinutia.MinutiaType == MainMinutia.MinutiaType ? 0 : 1;
int diff1 = target.NearestMtia.MinutiaType == NearestMtia.MinutiaType ? 0 : 1;
int diff2 = target.FarthestMtia.MinutiaType == FarthestMtia.MinutiaType ? 0 : 1;
return(3 * (diff0 + diff1 + diff2));
}
internal double RotationInvariantMatch(JYMtiaDescriptor target)
{
double distDiff = MatchDistances(target);
double alphaDiff = MatchAlphaAngles(target);
double betaDiff = MatchBetaAngles(target);
double ridgeCountDiff = MatchRidgeCounts(target);
double mtiaTypeDiff = MatchByType(target);
double dist = Math.Sqrt(distDiff + alphaDiff + betaDiff + ridgeCountDiff + mtiaTypeDiff);
return(dist < 66 ? (66 - dist) / 66 : 0);
}
internal double NoRotateMatch(JYMtiaDescriptor target)
{
if (!MatchMtiaDirections(target))
{
return(0);
}
double distDiff = MatchDistances(target);
double alphaDiff = MatchAlphaAngles(target);
double betaDiff = MatchBetaAngles(target);
double ridgeCountDiff = MatchRidgeCounts(target);
double mtiaTypeDiff = MatchByType(target);
double dist = Math.Sqrt(distDiff + alphaDiff + betaDiff + ridgeCountDiff + mtiaTypeDiff);
return(dist < 66 ? (66 - dist) / 66 : 0);
}
private bool MatchMtiaDirections(JYMtiaDescriptor target)
{
double diff = Angle.DifferencePi(target.MainMinutia.Angle, MainMinutia.Angle);
if (diff >= Math.PI / 4)
{
return(false);
}
diff = Angle.DifferencePi(target.NearestMtia.Angle, NearestMtia.Angle);
if (diff >= Math.PI / 4)
{
return(false);
}
diff = Angle.DifferencePi(target.FarthestMtia.Angle, FarthestMtia.Angle);
if (diff >= Math.PI / 4)
{
return(false);
}
return(true);
}
private double MatchByType(JYMtiaDescriptor target)
{
int diff0 = target.MainMinutia.MinutiaType == MainMinutia.MinutiaType ? 0 : 1;
int diff1 = target.NearestMtia.MinutiaType == NearestMtia.MinutiaType ? 0 : 1;
int diff2 = target.FarthestMtia.MinutiaType == FarthestMtia.MinutiaType ? 0 : 1;
return 3 * (diff0 + diff1 + diff2);
}
internal double RotationInvariantMatch(JYMtiaDescriptor target)
{
double distDiff = MatchDistances(target);
double alphaDiff = MatchAlphaAngles(target);
double betaDiff = MatchBetaAngles(target);
double ridgeCountDiff = MatchRidgeCounts(target);
double mtiaTypeDiff = MatchByType(target);
double dist = Math.Sqrt(distDiff + alphaDiff + betaDiff + ridgeCountDiff + mtiaTypeDiff);
return dist < 66 ? (66 - dist)/66 : 0;
}
private double MatchBetaAngles(JYMtiaDescriptor target)
{
double diff0 = Angle.DifferencePi(target.beta0, beta0);
double diff1 = Angle.DifferencePi(target.beta1, beta1);
return 54 * (Math.Pow(diff0, 2) + Math.Pow(diff1, 2)) / Math.PI;
}
private double MatchRidgeCounts(JYMtiaDescriptor target)
{
double diff0 = Math.Abs(target.ridgeCount0 - ridgeCount0);
double diff1 = Math.Abs(target.ridgeCount1 - ridgeCount1);
return 3 * (Math.Pow(diff0, 2) + Math.Pow(diff1, 2));
}
private bool MatchMtiaDirections(JYMtiaDescriptor target)
{
double diff = Angle.DifferencePi(target.MainMinutia.Angle, MainMinutia.Angle);
if (diff >= Math.PI / 4)
return false;
diff = Angle.DifferencePi(target.NearestMtia.Angle, NearestMtia.Angle);
if (diff >= Math.PI / 4)
return false;
diff = Angle.DifferencePi(target.FarthestMtia.Angle, FarthestMtia.Angle);
if (diff >= Math.PI / 4)
return false;
return true;
}
private double MatchDistances(JYMtiaDescriptor target)
{
double diff0 = Math.Abs(target.dist0 - dist0);
double diff1 = Math.Abs(target.dist1 - dist1);
return diff0 + diff1;
}
internal double NoRotateMatch(JYMtiaDescriptor target)
{
if (!MatchMtiaDirections(target))
return 0;
double distDiff = MatchDistances(target);
double alphaDiff = MatchAlphaAngles(target);
double betaDiff = MatchBetaAngles(target);
double ridgeCountDiff = MatchRidgeCounts(target);
double mtiaTypeDiff = MatchByType(target);
double dist = Math.Sqrt(distDiff + alphaDiff + betaDiff + ridgeCountDiff + mtiaTypeDiff);
return dist < 66 ? (66 - dist) / 66 : 0;
}
