ViSP  2.8.0
vpMomentGravityCenterNormalized Class Reference

#include <vpMomentGravityCenterNormalized.h>

+ Inheritance diagram for vpMomentGravityCenterNormalized:

Public Member Functions

 vpMomentGravityCenterNormalized ()
void compute ()
const char * name ()
std::vector< double > & get ()
double getXg () const
double getYg () const
vpMomentObjectgetObject () const
void linkTo (vpMomentDatabase &moments)
void update (vpMomentObject &object)

Protected Member Functions

vpMomentDatabasegetMoments ()

Protected Attributes

std::vector< double > values


VISP_EXPORT std::ostream & operator<< (std::ostream &os, const vpMomentGravityCenterNormalized &v)

Detailed Description

Class describing 2D normalized gravity center moment.

Centered and normalized gravity center moment is defined as follows: $(x_n,y_n)$ where $x_n = x_g a_n$ and $y_n = y_g a_n$.

vpMomentGravityCenterNormalized depends on vpMomentAreaNormalized to get access to $a_n$ and on vpMomentGravityCenter to get access to $(x_g,y_g)$ .

Definition at line 64 of file vpMomentGravityCenterNormalized.h.

Constructor & Destructor Documentation

vpMomentGravityCenterNormalized::vpMomentGravityCenterNormalized ( )

Default constructor.

Definition at line 72 of file vpMomentGravityCenterNormalized.cpp.

Member Function Documentation

void vpMomentGravityCenterNormalized::compute ( )
std::vector< double > & vpMomentGravityCenter::get ( )

Returns a vector of the two gravity center coordinates.

Coordinates in the following moment: $(x_g,y_g)$.

Definition at line 63 of file vpMomentGravityCenter.cpp.

References vpMoment::values.

Referenced by compute(), and vpMomentCentered::compute().

vpMomentDatabase& vpMoment::getMoments ( )

Returns the linked moment database.

the moment database

Definition at line 115 of file vpMoment.h.

Referenced by vpMomentArea::compute(), compute(), vpMomentCentered::compute(), vpMomentAreaNormalized::compute(), vpMomentCInvariant::compute(), and vpMomentAlpha::compute().

void vpMoment::linkTo ( vpMomentDatabase moments)

Links the moment to a database of moment primitives. If the moment depends on other moments, these moments must be linked to the same database.

Two moments of the same class cannot be stored in the same database
#include <visp/vpMomentObject.h>
#include <visp/vpPoint.h>
#include <visp/vpMomentGravityCenter.h>
#include <visp/vpMomentDatabase.h>
#include <visp/vpMomentCentered.h>
int main()
std::vector<vpPoint> vec_p;
p.set_x(1); p.set_y(1); // coordinates in meters in the image plane (vertex 1)
p.set_x(2); p.set_y(2); // coordinates in meters in the image plane (vertex 2)
obj.setType(vpMomentObject::DISCRETE); // Discrete mode.
obj.fromVector(vec_p); // Init the dense object with the polygon
vpMomentGravityCenter G; // declaration of gravity center
vpMomentCentered mc; // mc containts centered moments
G.linkTo(db); //add gravity center to database
mc.linkTo(db); //centered moments depend on gravity, add them to the
//database to grant access
G.update(obj); // specify the object for gravity center
mc.update(obj); // and for centered moments
G.compute(); // compute the moment
mc.compute(); //compute centered moments AFTER gravity center
return 0;
moments: database of moment primitives.

Definition at line 104 of file vpMoment.cpp.

References vpMoment::name().

Referenced by vpMomentCommon::getAlpha(), vpMomentCommon::getMu3(), vpMomentCommon::getSurface(), and vpMomentCommon::vpMomentCommon().

const char* vpMomentGravityCenterNormalized::name ( )

Moment name.

Reimplemented from vpMomentGravityCenter.

Definition at line 71 of file vpMomentGravityCenterNormalized.h.

void vpMoment::update ( vpMomentObject object)

Updates the moment with the current object. This does not compute any values.

object: object descriptor of the current camera vision.

Definition at line 117 of file vpMoment.cpp.

Friends And Related Function Documentation

VISP_EXPORT std::ostream& operator<< ( std::ostream &  os,
const vpMomentGravityCenterNormalized v 

Outputs the moment's values to a stream.

Definition at line 77 of file vpMomentGravityCenterNormalized.cpp.

Member Data Documentation