DGtal::detail::NormalizedTangentVectorFromDSS Struct Reference

#include <SegmentComputerEstimators.h>

Public Types
typedef DGtal::PointVector < 2, double >	RealVector
typedef RealVector	Value

Public Member Functions
template<typename DSS >
Value	operator() (const DSS &aDSS) const

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Detailed Description

Description of class 'NormalizedTangentVectorFromDSS'

Aim: computes the unit vector of a DSS

Definition at line 719 of file SegmentComputerEstimators.h.

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Member Typedef Documentation

typedef DGtal::PointVector<2,double> DGtal::detail::NormalizedTangentVectorFromDSS::RealVector

Definition at line 722 of file SegmentComputerEstimators.h.

typedef RealVector DGtal::detail::NormalizedTangentVectorFromDSS::Value

Definition at line 723 of file SegmentComputerEstimators.h.

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Member Function Documentation

template<typename DSS >

Value DGtal::detail::NormalizedTangentVectorFromDSS::operator() ( const DSS &  aDSS ) const

inline

Operator()

Returns:

normalized tangent

Parameters:

aDSS	an instance of segment computer devoted to the DSS recognition.

Template Parameters:

DSS	a model of segment computer, which must have methods getA() and getB() returning the y- and x-component of the tangent vector.

Definition at line 738 of file SegmentComputerEstimators.h.

References DGtal::PointVector< dim, TEuclideanRing >::L_2.

      {
        double x = NumberTraits<typename DSS::Integer>
	  ::castToDouble( aDSS.getB() ); 
        double y = NumberTraits<typename DSS::Integer>
	  ::castToDouble( aDSS.getA() );
        RealVector v(x,y); 
        double norm = v.norm(RealVector::L_2);
        v /= norm; 
        return v;
      }

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

• SegmentComputerEstimators.h