latest version v1.9 - last update 24 Nov 2005

lti::distanceType< T > Class Template Reference

This class defines the appropriate return types when calculating the distance between to values of type T. More...

#include <ltiDistanceType.h>

Inheritance diagram for lti::distanceType< T >:

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Public Types
typedef distanceType< typename T::value_type >::distance_type	distance_type
typedef distanceType< typename T::value_type >::square_distance_type	square_distance_type
typedef distanceType< typename T::value_type >::fp_distance_type	fp_distance_type

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Detailed Description

template<class T>
class lti::distanceType< T >

This class defines the appropriate return types when calculating the distance between to values of type T.

These can be simple types like int or double or lti types like vector<T>, rgbPixel etc. There are three different distance types:

• distance_type is used when a simple distance is calculated between two instances of T which does not involve accumulation of squares or typical floating point operations.
• square_distance_type is used for the result of distances that involve the square of the type T.
• fp_distance_type is used for distances that involve floating point operations such as the sqrt or log functions.

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Member Typedef Documentation

template<class T> typedef distanceType<typename T::value_type>::distance_type lti::distanceType< T >::distance_type

Suggested distance type for distances that use simple accumulation of type elements (for example l1Distantor).

template<class T> typedef distanceType<typename T::value_type>::fp_distance_type lti::distanceType< T >::fp_distance_type

Suggested distance type for distances that use accumulation of type elements or their squares and use a typical floating point (fp) operation like sqrt or log on that. (for example l2Distantor).

template<class T> typedef distanceType<typename T::value_type>::square_distance_type lti::distanceType< T >::square_distance_type

Suggested distance type for distances that use accumulation of squares of type elements (for example l2SqrDistantor).

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The documentation for this class was generated from the following file:

• ltiDistanceType.h

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