NICE_VisLearning/math/distances/genericDistance.h

#ifndef _NICE_OBJREC_GENERICDISTANCESELECTION_INCLUDE
#define _NICE_OBJREC_GENERICDISTANCESELECTION_INCLUDE

#include <core/vector/Distance.h>

namespace OBJREC
{

class GenericDistanceSelection
{
public:

	static NICE::VectorDistance<double> *selectDistance(
			std::string distance_type)
	{
		NICE::VectorDistance<double> *distance = NULL;

		if (distance_type == "euclidean")
		{
			distance = new NICE::EuclidianDistance<double>();
		}
		else if (distance_type == "manhattan" || distance_type == "cityblock")
		{
			distance = new NICE::ManhattanDistance<double>();
		}
		else if (distance_type == "median")
		{
			distance = new NICE::MedianDistance<double>();
		}
		else if (distance_type == "cosinus")
		{
			distance = new NICE::CosDistance<double>();
		}
		else if (distance_type == "spherical")
		{
			distance = new NICE::SphericalDistance<double>();
		}
		else if (distance_type == "chisquare" || distance_type == "chi2")
		{
			distance = new NICE::Chi2Distance<double>();

		}
		else if (distance_type == "kl" || distance_type == "kullbackleibler")
		{
			distance = new NICE::KLDistance<double>();
		}
		else if (distance_type == "bhattacharyya")
		{
			distance = new NICE::BhattacharyyaDistance<double>();
		}
		else
		{
			fthrow(Exception, "Distance type " << distance_type << " is unknown - euclidean distance used" );
			distance = new NICE::EuclidianDistance<double>();
		}

		return distance;
	}

};
} //namespace
#endif