|| || || || || || || ||

---

EstimateEllipse.h

Go to the documentation of this file.

#ifndef Impala_Core_Geometry_EstimateEllipse_h
#define Impala_Core_Geometry_EstimateEllipse_h

namespace Impala
{
namespace Core
{
namespace Geometry
{

void
EstimateEllipse(double value[4], double& large, double& small, double& ori)
{
    double xx=0, xy=0, yy=0;
    double x;

    xx += value[0];
    x = 0.5*value[1]*sqrt(2.);
    xy += x;
    xx += x;
    yy += x;
    yy += value[2];
    x = 0.5*value[3]*sqrt(2.);
    xy -= x;
    xx += x;
    yy += x;

    double H, D, Ia, Ib;
    H = 0.5*(xx+yy);
    D = H*H-xx*yy+xy*xy;
    Ia = H+sqrt(D);
    Ib = H-sqrt(D);
    large = 2.*Ia/4.;
    small = 2.*Ib/4.;
    ori = 0; // this seems to not be computed
}

} // namespace Geometry
} // namespace Core
} // namespace Impala

#endif

---