otb::SimplifyPathFunctor< TInput, TOutput > Class Template Reference

#include <otbSimplifyPathFunctor.h>

Public Types
typedef OutputPathType::Pointer	OutputPathPointerType
typedef TOutput	OutputPathType
typedef TInput::VertexListType::ConstIterator	VertexListConstIteratorType
typedef TInput::VertexListType::ConstPointer	VertexListConstPointerType

Public Member Functions
double	GetTolerance (void) const
OutputPathPointerType	operator() (const TInput *input)
void	SetTolerance (double Tolerance)
	SimplifyPathFunctor ()
	~SimplifyPathFunctor ()

Private Member Functions
bool	TestPathConsistency (VertexListConstIteratorType begin, VertexListConstIteratorType end) const

Private Attributes
double	m_Tolerance

Detailed Description

template<class TInput, class TOutput>
class otb::SimplifyPathFunctor< TInput, TOutput >

This filter performs a simplification of the input path.

It reduces the number of vertices in each path, according to a tolerance criterion. It aims at removing aligned vertices while keeping sharp angular points.

In order to ensure the unicity of its output, each path is considered first from begin to end, then from begin to the first vertex before the end. At each step, the consistency of the path is checked : the equation of the line passing by the first and last vertices is computed. Then, for each vertices between them, the euclidean distance to this line is computed. If for one vertex, this distance is upper than the tolerance threshold, the path is considered to be inconsistent and no vertices can be removed.

If the path is considered consistent (which will occur at least with a 2 vertices path), only the beginning and ending vertices are kept and a new search iteration begin at its end.

This filter is part of the road extraction framework.

See also

UnaryFunctorObjectListFilter

Definition at line 54 of file otbSimplifyPathFunctor.h.

Member Typedef Documentation

OutputPathPointerType

template<class TInput , class TOutput >

typedef OutputPathType::Pointer otb::SimplifyPathFunctor< TInput, TOutput >::OutputPathPointerType

Definition at line 60 of file otbSimplifyPathFunctor.h.

OutputPathType

template<class TInput , class TOutput >

typedef TOutput otb::SimplifyPathFunctor< TInput, TOutput >::OutputPathType

Definition at line 59 of file otbSimplifyPathFunctor.h.

VertexListConstIteratorType

template<class TInput , class TOutput >

typedef TInput::VertexListType::ConstIterator otb::SimplifyPathFunctor< TInput, TOutput >::VertexListConstIteratorType

Definition at line 57 of file otbSimplifyPathFunctor.h.

VertexListConstPointerType

template<class TInput , class TOutput >

typedef TInput::VertexListType::ConstPointer otb::SimplifyPathFunctor< TInput, TOutput >::VertexListConstPointerType

Definition at line 58 of file otbSimplifyPathFunctor.h.

Constructor & Destructor Documentation

SimplifyPathFunctor()

template<class TInput , class TOutput >

otb::SimplifyPathFunctor< TInput, TOutput >::SimplifyPathFunctor ( )

inline

Definition at line 71 of file otbSimplifyPathFunctor.h.

References otb::SimplifyPathFunctor< TInput, TOutput >::m_Tolerance.

~SimplifyPathFunctor()

template<class TInput , class TOutput >

otb::SimplifyPathFunctor< TInput, TOutput >::~SimplifyPathFunctor ( )

inline

Definition at line 75 of file otbSimplifyPathFunctor.h.

Member Function Documentation

GetTolerance()

template<class TInput , class TOutput >

double otb::SimplifyPathFunctor< TInput, TOutput >::GetTolerance ( void  ) const

inline

Definition at line 66 of file otbSimplifyPathFunctor.h.

References otb::SimplifyPathFunctor< TInput, TOutput >::m_Tolerance.

operator()()

template<class TInput , class TOutput >

OutputPathPointerType otb::SimplifyPathFunctor< TInput, TOutput >::operator() ( const TInput *  input )

inline

Definition at line 79 of file otbSimplifyPathFunctor.h.

References otb::SimplifyPathFunctor< TInput, TOutput >::TestPathConsistency().

SetTolerance()

template<class TInput , class TOutput >

void otb::SimplifyPathFunctor< TInput, TOutput >::SetTolerance ( double  Tolerance )

inline

Definition at line 62 of file otbSimplifyPathFunctor.h.

References otb::SimplifyPathFunctor< TInput, TOutput >::m_Tolerance.

Referenced by otb::CorrectPolygonFunctor< TPolygon >::operator()().

TestPathConsistency()

template<class TInput , class TOutput >

bool otb::SimplifyPathFunctor< TInput, TOutput >::TestPathConsistency ( VertexListConstIteratorType  begin, VertexListConstIteratorType  end  ) const

inlineprivate

Definition at line 115 of file otbSimplifyPathFunctor.h.

References otb::SimplifyPathFunctor< TInput, TOutput >::m_Tolerance.

Referenced by otb::SimplifyPathFunctor< TInput, TOutput >::operator()().

Member Data Documentation

m_Tolerance

template<class TInput , class TOutput >

double otb::SimplifyPathFunctor< TInput, TOutput >::m_Tolerance

private

Definition at line 113 of file otbSimplifyPathFunctor.h.

Referenced by otb::SimplifyPathFunctor< TInput, TOutput >::GetTolerance(), otb::SimplifyPathFunctor< TInput, TOutput >::SetTolerance(), otb::SimplifyPathFunctor< TInput, TOutput >::SimplifyPathFunctor(), and otb::SimplifyPathFunctor< TInput, TOutput >::TestPathConsistency().

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

• otbSimplifyPathFunctor.h