public static double[] ScaleInvert(double[] vec, double sr, double sc)
{
double[,] m = new double[, ] {
{ 1 / sr, 0.0, 0.0 },
{ 0.0, 1 / sc, 0.0 },
{ 0.0, 0.0, 1.0 }
};
NcvMatrix mat = new NcvMatrix(m);
return(mat.Multiply(vec));
}
public static double[] TranslateInvert(double[] vec, double tr, double tc)
{
double[,] m = new double[, ] {
{ 1.0, 0.0, -tr },
{ 0.0, 1.0, -tc },
{ 0.0, 0.0, 1.0 }
};
NcvMatrix mat = new NcvMatrix(m);
return(mat.Multiply(vec));
}
public static double[] SkewInvert(double[] vec, double theta)
{
double cos = System.Math.Cos(theta);
double sin = System.Math.Sin(theta);
double[,] m = new double[, ] {
{ 1 / cos, 0.0, 0.0 },
{ -sin / cos, 1.0, 0.0 },
{ 0.0, 0.0, 1.0 }
};
NcvMatrix mat = new NcvMatrix(m);
return(mat.Multiply(vec));
}
public static double[] RotateInvert(double[] vec, double alpha)
{
double cos = System.Math.Cos(alpha);
double sin = System.Math.Sin(alpha);
double[,] m = new double[, ] {
{ cos, sin, 0.0 },
{ -sin, cos, 0.0 },
{ 0.0, 0.0, 1.0 }
};
NcvMatrix mat = new NcvMatrix(m);
return(mat.Multiply(vec));
}