/// <summary>
/// Выдает точки
/// </summary>
/// <param name="img">Матрица серого изображения</param>
public Vector GetPoints(Matrix img)
{
GenVectorPoint(img);
Vector real = points.MagnitudeToVector().CutAndZero(n);
Vector im = points.MagnitudeToVector().CutAndZero(n);
real /= Statistic.MaximalValue(real);
im /= Statistic.MaximalValue(im);
real -= Statistic.ExpectedValue(real);
im -= Statistic.ExpectedValue(im);
return(Vector.Concatinate(new Vector[] { real, im }));
}
// Генерация вектора фич
private Vector GenFeature()
{
ComplexVector cV = Furie.fft(points);
double k, cP1, cP2;
Complex kR;
if (!_isScale)
{
cP1 = cV[0].Magnitude;
cP2 = cV[cV.N - 1].Magnitude;
k = Math.Sqrt(cP1 * cP1 + cP2 * cP2);
cV /= k;
}
if (!_isRot)
{
cP1 = cV[0].Phase;
cP2 = cV[cV.N - 1].Phase;
kR = Complex.Exp(new Complex(0, 1) * (cP2 - cP1) / 2.0);
cV *= kR;
}
if (!_isMove)
{
cV[0] = 0;
}
cV = cV.CutAndZero(n);
Vector modules = cV.MagnitudeToVector();
Vector phases = cV.PhaseToVector();
return(phases);//Vector.Concatinate(new Vector[]{modules, phases});
}
/// <summary>
/// Быстрое кепстральное преобразование
/// </summary>
/// <param name="signal">Сигнал</param>
/// <returns></returns>
public static Vector FKT(ComplexVector signal)
{
ComplexVector spectr = Furie.fft(signal);
Vector Aspectr = MathFunc.ln(spectr.MagnitudeToVector().TransformVector(x => x * x));
return(Furie.fft(Aspectr).RealToVector() / Aspectr.N);
}