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vpFeatureLine Class Reference
Visual features

#include <visp3/visual_features/vpFeatureLine.h>

+ Inheritance diagram for vpFeatureLine:

Public Types

enum  { FEATURE_ALL = 0xffff }
 
enum  vpBasicFeatureDeallocatorType { user, vpServo }
 

Public Member Functions

 vpFeatureLine ()
 
virtual ~vpFeatureLine ()
 
void buildFrom (const double rho, const double theta)
 
void buildFrom (const double rho, const double theta, const double A, const double B, const double C, const double D)
 
void display (const vpCameraParameters &cam, const vpImage< unsigned char > &I, const vpColor &color=vpColor::green, unsigned int thickness=1) const
 
void display (const vpCameraParameters &cam, const vpImage< vpRGBa > &I, const vpColor &color=vpColor::green, unsigned int thickness=1) const
 
vpFeatureLine * duplicate () const
 
vpColVector error (const vpBasicFeature &s_star, const unsigned int select=FEATURE_ALL)
 
double getRho () const
 
double getTheta () const
 
void init ()
 
vpMatrix interaction (const unsigned int select=FEATURE_ALL)
 
void print (const unsigned int select=FEATURE_ALL) const
 
void setRhoTheta (const double rho, const double theta)
 
void setABCD (const double A, const double B, const double C, const double D)
 
Inherited functionalities from vpBasicFeature
unsigned int dimension_s ()
 
vpColVector get_s (unsigned int select=FEATURE_ALL) const
 
vpBasicFeatureDeallocatorType getDeallocate ()
 
unsigned int getDimension (const unsigned int select=FEATURE_ALL) const
 
virtual double operator[] (const unsigned int i) const
 
void setDeallocate (vpBasicFeatureDeallocatorType d)
 
void setFlags ()
 

Static Public Member Functions

static unsigned int selectRho ()
 
static unsigned int selectTheta ()
 
static unsigned int selectAll ()
 

Static Public Attributes

static const unsigned int FEATURE_LINE [32]
 

Protected Member Functions

void resetFlags ()
 

Protected Attributes

vpColVector s
 
unsigned int dim_s
 
bool * flags
 
unsigned int nbParameters
 
vpBasicFeatureDeallocatorType deallocate
 

Detailed Description

Class that defines a 2D line visual feature $ s$ which is composed by two parameters that are $ \rho $ and $ \theta $, the polar coordinates of a line.

In this class, the equation of the line in the image plane is given by :

\[ x \; cos(\theta) + y \; sin(\theta) -\rho = 0 \]

Here $ x $ and $ y $ are the coordinates of a point belonging to the line and they are given in meter. The following image shows the meanings of the distance $\rho$ and the angle $\theta$.

vpFeatureLine.gif

You have to note that the $ \theta $ angle has its value between $ -\pi $ and $ \pi $ and that the $ \rho $ distance can be positive or negative. The conventions are illustrated by the image above.

The visual features can be set easily from an instance of the classes vpLine, vpMeLine or vpCylinder. For more precision see the class vpFeatureBuilder.

Once the values of the visual features are set, the interaction() method allows to compute the interaction matrix $ L $ associated to the visual feature, while the error() method computes the error vector $(s - s^*)$ between the current visual feature and the desired one.

The code below shows how to create a eye-in hand visual servoing task using a 2D line feature $(\rho,\theta)$ that correspond to the 2D equation of a line in the image plan. To control six degrees of freedom, at least four other features must be considered like two other line features for example. First we create a current ( $s$) 2D line feature. Then we set the task to use the interaction matrix associated to the current feature $L_s$. And finally we compute the camera velocity $v=-\lambda \; L_s^+ \; (s-s^*)$. The current feature $s$ is updated in the while() loop.

#include <visp3/visual_features/vpFeatureLine.h>
#include <visp3/vs/vpServo.h>
int main()
{
vpServo task; // Visual servoing task
vpFeatureLine sd; //The desired line feature.
//Sets the desired features rho and theta
double rhod = 0;
double thetad = 0;
//Sets the parameters which describe the equation of a plan in the camera frame : AX+BY+CZ+D=0.
//The line described by the features belongs to this plan.
//Normally two plans are needed to describe a line. But to compute the interaction matrix only
//one equation of the two plans is needed.
//Notes that the Dd value must not be equal to zero !
double Ad = 0;
double Bd = 0;
double Cd = 1;
double Dd = -1;
//Set the line feature thanks to the desired parameters.
sd.buildfrom(rhod, thetad, Ad,Bd, Cd, Dd);
vpFeatureLine s; //The current line feature.
//Sets the current features rho and theta
double rho; //You have to compute the value of rho.
double theta; //You have to compute the value of theta.
//Set the line feature thanks to the current parameters.
s.buildfrom(rho, theta);
//In this case the parameters A, B, C, D are not needed because the interaction matrix is computed
//with the desired visual feature.
// Set eye-in-hand control law.
// The computed velocities will be expressed in the camera frame
task.setServo(vpServo::EYEINHAND_CAMERA);
// Interaction matrix is computed with the desired visual features sd
task.setInteractionMatrixType(vpServo::DESIRED);
// Add the 2D line feature to the task
task.addFeature(s, sd);
// Control loop
for ( ; ; ) {
// The new parameters rho and theta must be computed here.
// Update the current line visual feature
s.buildfrom(rho, theta);
// compute the control law
vpColVector v = task.computeControlLaw(); // camera velocity
}
return 0;
}

If you want to build your own control law, this other example shows how to create a current ( $s$) and desired ( $s^*$) 2D line visual feature, compute the corresponding error vector $(s-s^*)$ and finally build the interaction matrix $L_s$.

#include <visp3/visual_features/vpFeatureLine.h>
#include <visp3/core/vpMatrix.h>
int main()
{
vpFeatureLine sd; //The desired line feature.
//Sets the desired features rho and theta
double rhod = 0;
double thetad = 0;
//Sets the parameters which describe the equation of a plan in the camera frame : AX+BY+CZ+D=0.
double Ad = 0;
double Bd = 0;
double Cd = 1;
double Dd = -1;
//Set the line feature thanks to the desired parameters.
sd.buildfrom(rhod, thetad, Ad,Bd, Cd, Dd);
vpFeatureLine s; //The current line feature.
//Sets the current features rho and theta
double rho; //You have to compute the value of rho.
double theta; //You have to compute the value of theta.
//Sets the parameters which describe the equation of a plan in the camera frame : AX+BY+CZ+D=0.
double A; //You have to compute the value of A.
double B; //You have to compute the value of B.
double C; //You have to compute the value of C.
double D; //You have to compute the value of D. D must not be equal to zero !
//Set the line feature thanks to the current parameters.
s.buildfrom(rho, theta, A, B, C, D);
// Compute the interaction matrix L_s for the current line feature
vpMatrix L = s.interaction();
// You can also compute the interaction matrix L_s for the desired line feature
// The corresponding line of code is : vpMatrix L = sd.interaction();
// Compute the error vector (s-sd) for the line feature
s.error(s_star);
}
Examples:
servoAfma6Cylinder2DCamVelocity.cpp, servoAfma6Cylinder2DCamVelocitySecondaryTask.cpp, servoAfma6Line2DCamVelocity.cpp, servoAfma6SquareLines2DCamVelocity.cpp, servoAfma6TwoLines2DCamVelocity.cpp, servoSimuCylinder.cpp, servoSimuCylinder2DCamVelocityDisplay.cpp, servoSimuCylinder2DCamVelocityDisplaySecondaryTask.cpp, servoSimuLine2DCamVelocityDisplay.cpp, servoSimuSquareLine2DCamVelocityDisplay.cpp, testPoseFeatures.cpp, and trackMeLine.cpp.

Definition at line 197 of file vpFeatureLine.h.

Member Enumeration Documentation

anonymous enum
inherited
Enumerator
FEATURE_ALL 

Definition at line 84 of file vpBasicFeature.h.

enum vpBasicFeature::vpBasicFeatureDeallocatorType
inherited

Indicates who should deallocate the feature.

Enumerator
user 
vpServo 

Definition at line 92 of file vpBasicFeature.h.

Constructor & Destructor Documentation

vpFeatureLine::vpFeatureLine ( )

Default constructor that build a visual feature.

Definition at line 111 of file vpFeatureLine.cpp.

References init().

Referenced by duplicate().

virtual vpFeatureLine::~vpFeatureLine ( )
inlinevirtual

Destructor.

Definition at line 211 of file vpFeatureLine.h.

Member Function Documentation

void vpFeatureLine::buildFrom ( const double  rho,
const double  theta 
)

Build a 2D line visual feature from the line equation parameters $ \rho $ and $ \theta $ given in the image plan.

\[ x \; cos(\theta) + y \; sin(\theta) -\rho = 0 \]

See the vpFeatureLine class description for more details about $ \rho $ and $ \theta $.

Parameters
rho: The $ \rho $ parameter.
theta: The $ \theta $ parameter.

Definition at line 412 of file vpFeatureLine.cpp.

References vpBasicFeature::flags, and vpBasicFeature::s.

Referenced by vpFeatureBuilder::create().

void vpFeatureLine::buildFrom ( const double  rho,
const double  theta,
const double  A_,
const double  B_,
const double  C_,
const double  D_ 
)

Build a 2D line visual feature from the line equation parameters $ \rho $ and $ \theta $ given in the image plan. The parameters A, B, C and D which describe the equation of a plan to which the line belongs, are set in the same time.

\[ x \; cos(\theta) + y \; sin(\theta) -\rho = 0 \]

\[ AX + BY + CZ + D = 0 \]

See the vpFeatureLine class description for more details about $ \rho $ and $ \theta $.

The A, B, C, D parameters are needed to compute the interaction matrix associated to a visual feature. Normally, two plans are needed to describe a line (the intersection of those two plans). But to compute the interaction matrix only one plan equation is required. The only one restrictions is that the value of D must not be equal to zero !

Parameters
rho: The $ \rho $ parameter.
theta: The $ \theta $ parameter.
A_: A parameter of the plan equation.
B_: B parameter of the plan equation.
C_: C parameter of the plan equation.
D_: D parameter of the plan equation.

Definition at line 448 of file vpFeatureLine.cpp.

References vpBasicFeature::flags, vpBasicFeature::nbParameters, and vpBasicFeature::s.

unsigned int vpBasicFeature::dimension_s ( )
inlineinherited

Return the dimension of the feature vector $\bf s$.

Definition at line 117 of file vpBasicFeature.h.

void vpFeatureLine::display ( const vpCameraParameters &  cam,
const vpImage< unsigned char > &  I,
const vpColor &  color = vpColor::green,
unsigned int  thickness = 1 
) const
virtual

Display line feature.

Parameters
cam: Camera parameters.
I: Image on which features have to be displayed.
color: Color used to display the feature.
thickness: Thickness of the feature representation.

Implements vpBasicFeature.

Examples:
servoAfma6Cylinder2DCamVelocity.cpp, servoAfma6Cylinder2DCamVelocitySecondaryTask.cpp, servoAfma6Line2DCamVelocity.cpp, servoAfma6SquareLines2DCamVelocity.cpp, and servoAfma6TwoLines2DCamVelocity.cpp.

Definition at line 491 of file vpFeatureLine.cpp.

References vpFeatureDisplay::displayLine(), getRho(), getTheta(), and vpERROR_TRACE.

void vpFeatureLine::display ( const vpCameraParameters &  cam,
const vpImage< vpRGBa > &  I,
const vpColor &  color = vpColor::green,
unsigned int  thickness = 1 
) const
virtual

Display line feature.

Parameters
cam: Camera parameters.
I: Color image on which features have to be displayed.
color: Color used to display the feature.
thickness: Thickness of the feature representation.

Implements vpBasicFeature.

Definition at line 522 of file vpFeatureLine.cpp.

References vpFeatureDisplay::displayLine(), getRho(), getTheta(), and vpERROR_TRACE.

vpFeatureLine * vpFeatureLine::duplicate ( ) const
virtual

Create an object with the same type.

vpBasicFeature *s_star;
vpFeatureLine s;
s_star = s.duplicate(); // s_star is now a vpFeatureLine

Implements vpBasicFeature.

Definition at line 472 of file vpFeatureLine.cpp.

References vpFeatureLine().

vpColVector vpFeatureLine::error ( const vpBasicFeature &  s_star,
const unsigned int  select = FEATURE_ALL 
)
virtual

Compute the error $ (s-s^*)$ between the current and the desired visual features from a subset of the possible features.

Parameters
s_star: Desired visual feature.
select: The error can be computed for a selection of a subset of the possible line features.
  • To compute the error for all the two line features use vpBasicFeature::FEATURE_ALL. In that case the error vector is a 2 dimension column vector.
  • To compute the error for only one of the line component feature ( $ \rho, \theta $) use one of the corresponding function selectRho() or selectTheta(). In that case the error vector is a 1 dimension column vector.
Returns
The error $ (s-s^*)$ between the current and the desired visual feature.

The code below shows how to use this method to manipulate the $ \theta $ subset:

// Creation of the current feature s
vpFeatureLine s;
s.buildFrom(0, 0, 0, 0, 1, -1);
// Creation of the desired feature s*
vpFeatureLine s_star;
s_star.buildFrom(0, 0, 0, 0, 1, -5);
// Compute the interaction matrix for the theta feature
vpMatrix L_theta = s.interaction( vpFeatureLine::selectTheta() );
// Compute the error vector (s-s*) for the Theta feature
s.error(s_star, vpFeatureLine::selectTheta());

Reimplemented from vpBasicFeature.

Definition at line 330 of file vpFeatureLine.cpp.

References vpBasicFeature::s, selectRho(), selectTheta(), and vpColVector::stack().

vpColVector vpBasicFeature::get_s ( unsigned int  select = FEATURE_ALL) const
inherited

Get the feature vector $\bf s$.

Examples:
servoAfma6Ellipse2DCamVelocity.cpp.

Definition at line 130 of file vpBasicFeature.cpp.

References vpBasicFeature::dim_s, vpBasicFeature::FEATURE_LINE, vpBasicFeature::s, and vpColVector::stack().

Referenced by vpServo::computeError(), vpBasicFeature::error(), vpFeatureDepth::error(), vpGenericFeature::error(), vpFeatureThetaU::error(), and vpFeatureTranslation::error().

vpBasicFeatureDeallocatorType vpBasicFeature::getDeallocate ( )
inlineinherited

Definition at line 135 of file vpBasicFeature.h.

unsigned int vpBasicFeature::getDimension ( const unsigned int  select = FEATURE_ALL) const
inherited

Get the feature vector dimension.

Definition at line 115 of file vpBasicFeature.cpp.

References vpBasicFeature::dim_s, vpBasicFeature::FEATURE_LINE, vpArray2D< Type >::getRows(), and vpBasicFeature::s.

double vpFeatureLine::getRho ( ) const
inline

Return the $ \rho $ subset value of the visual feature $ s $.

Examples:
trackMeLine.cpp.

Definition at line 239 of file vpFeatureLine.h.

Referenced by vpMbtDistanceLine::computeInteractionMatrixError(), vpMbtDistanceCylinder::computeInteractionMatrixError(), vpFeatureBuilder::create(), and display().

double vpFeatureLine::getTheta ( ) const
inline

Return the $ \theta $ subset value of the visual feature $ s $.

Examples:
trackMeLine.cpp.

Definition at line 244 of file vpFeatureLine.h.

Referenced by vpMbtDistanceLine::computeInteractionMatrixError(), vpMbtDistanceCylinder::computeInteractionMatrixError(), vpFeatureBuilder::create(), and display().

void vpFeatureLine::init ( void  )
virtual

Initialize the memory space requested for 2D line visual feature.

Implements vpBasicFeature.

Definition at line 89 of file vpFeatureLine.cpp.

References vpBasicFeature::dim_s, vpBasicFeature::flags, vpBasicFeature::nbParameters, vpColVector::resize(), and vpBasicFeature::s.

Referenced by vpFeatureLine().

vpMatrix vpFeatureLine::interaction ( const unsigned int  select = FEATURE_ALL)
virtual

Compute and return the interaction matrix $ L $. The computation is made thanks to the values of the line feature $ \rho $ and $ \theta $ and the equation of a plan to which the line belongs.

\[ L = \left[\begin{array}{c}L_{\rho} \\ L_{\theta}\end{array}\right] = \left[\begin{array}{cccccc} \lambda_{\rho}cos(\theta) & \lambda_{\rho}sin(\theta) & -\lambda_{\rho}\rho & (1+\rho^2)sin(\theta) & -(1+\rho^2)cos(\theta) & 0 \\ \lambda_{\theta}cos(\theta) & \lambda_{\theta}sin(\theta) & -\lambda_{\theta}\rho & -\rho cos(\theta) & -\rho sin(\theta) & -1 \end{array}\right]\]

Where :

\[ \lambda_{\rho} = (A \; \rho \; cos(\theta) + B \; \rho \; sin(\theta) + C) / D \]

\[ \lambda_{\theta} = (A \; sin(\theta) - B \; cos(\theta)) / D \]

Parameters
select: Selection of a subset of the possible line features.
  • To compute the interaction matrix for all the two line features use vpBasicFeature::FEATURE_ALL. In that case the dimension of the interaction matrix is $ [2 \times 6] $
  • To compute the interaction matrix for only one of the line component feature ( $ \rho, \theta $) use one of the corresponding function selectRho() or selectTheta(). In that case the returned interaction matrix is $ [1 \times 6] $ dimension.
Returns
The interaction matrix computed from the line features.

The code below shows how to compute the interaction matrix associated to the visual feature $ s = \theta $.

// Creation of the current feature s
vpFeatureLine s;
s.buildFrom(0, 0, 0, 0, 1, -1);
vpMatrix L_theta = s.interaction( vpFeatureLine::selectTheta() );

The code below shows how to compute the interaction matrix associated to the visual feature $ s = (\rho, \theta) $.

// Creation of the current feature s
vpFeatureLine s;
s.buildFrom(0, 0, 0, 0, 1, -1);
vpMatrix L_theta = s.interaction( vpBasicFeature::FEATURE_ALL );

Implements vpBasicFeature.

Definition at line 203 of file vpFeatureLine.cpp.

References vpFeatureException::badInitializationError, vpBasicFeature::deallocate, vpBasicFeature::flags, vpBasicFeature::nbParameters, vpBasicFeature::resetFlags(), vpArray2D< Type >::resize(), vpBasicFeature::s, selectRho(), selectTheta(), vpMatrix::stack(), vpBasicFeature::user, vpERROR_TRACE, and vpTRACE.

Referenced by vpMbtDistanceLine::computeInteractionMatrixError(), and vpMbtDistanceCylinder::computeInteractionMatrixError().

virtual double vpBasicFeature::operator[] ( const unsigned int  i) const
inlinevirtualinherited

Return element i in the state vector (usage : x = s[i] )

Definition at line 142 of file vpBasicFeature.h.

void vpFeatureLine::print ( const unsigned int  select = FEATURE_ALL) const
virtual

Print to stdout the values of the current visual feature $ s $.

Parameters
select: Selection of a subset of the possible line features.
vpFeatureLine s; // Current visual feature s
// Creation of the current feature s
s.buildFrom(0, 0);
s.print(); // print all the 2 components of the feature
s.print(vpBasicFeature::FEATURE_ALL); // same behavior then previous line
s.print(vpFeatureLine::selectRho()); // print only the rho component

Implements vpBasicFeature.

Examples:
servoSimuCylinder2DCamVelocityDisplay.cpp, servoSimuCylinder2DCamVelocityDisplaySecondaryTask.cpp, servoSimuLine2DCamVelocityDisplay.cpp, and servoSimuSquareLine2DCamVelocityDisplay.cpp.

Definition at line 385 of file vpFeatureLine.cpp.

References vpBasicFeature::s, selectRho(), and selectTheta().

void vpBasicFeature::resetFlags ( )
protectedinherited

Definition at line 148 of file vpBasicFeature.cpp.

References vpBasicFeature::flags, and vpBasicFeature::nbParameters.

Referenced by vpFeatureVanishingPoint::interaction(), vpFeatureEllipse::interaction(), vpFeatureDepth::interaction(), vpFeaturePoint::interaction(), interaction(), vpFeaturePoint3D::interaction(), vpFeatureThetaU::interaction(), vpFeaturePointPolar::interaction(), and vpFeatureTranslation::interaction().

static unsigned int vpBasicFeature::selectAll ( )
inlinestaticinherited

Select all the features.

Definition at line 154 of file vpBasicFeature.h.

unsigned int vpFeatureLine::selectRho ( )
static

Function used to select the $ \rho $ subset of the line visual feature.

This function is to use in conjunction with interaction() in order to compute the interaction matrix associated to $ \rho $.

This function is also useful in the vpServo class to indicate that a subset of the visual feature is to use in the control law:

vpFeatureLine s;
vpServo task;
...
// Add the (rho) subset features from the 2D line
task.addFeature(s, vpFeatureLine::selectRho());

Definition at line 558 of file vpFeatureLine.cpp.

References vpBasicFeature::FEATURE_LINE.

Referenced by error(), interaction(), and print().

unsigned int vpFeatureLine::selectTheta ( )
static

Function used to select the $ \theta $ subset of the line visual feature.

This function is to use in conjunction with interaction() in order to compute the interaction matrix associated to $ \theta $.

This function is also useful in the vpServo class to indicate that a subset of the visual feature is to use in the control law:

vpFeatureLine s;
vpServo task;
...
// Add the (rho) subset features from the 2D line
task.addFeature(s, vpFeatureLine::selectTheta());

Definition at line 576 of file vpFeatureLine.cpp.

References vpBasicFeature::FEATURE_LINE.

Referenced by error(), interaction(), and print().

void vpFeatureLine::setABCD ( const double  A_,
const double  B_,
const double  C_,
const double  D_ 
)

Sets the values of A, B, C and D which represent the parameters used to describe the equation of a plan in the camera frame.

\[ AX + BY + CZ + D = 0 \]

Those parameters are needed to compute the interaction matrix associated to a visual feature. Normally, two plans are needed to describe a line (the intersection of those two plans). But to compute the interaction matrix only one plan equation is required. The only one restrictions is that the value of D must not be equal to zero !

Parameters
A_: A value to set.
B_: B value to set.
C_: C value to set.
D_: D value to set.

Definition at line 143 of file vpFeatureLine.cpp.

References vpBasicFeature::flags, and vpBasicFeature::nbParameters.

Referenced by vpFeatureBuilder::create().

void vpBasicFeature::setDeallocate ( vpBasicFeatureDeallocatorType  d)
inlineinherited

Definition at line 149 of file vpBasicFeature.h.

Referenced by vpServo::addFeature().

void vpBasicFeature::setFlags ( )
inherited

Set feature flags to true to prevent warning when re-computing the interaction matrix without having updated the feature.

Definition at line 158 of file vpBasicFeature.cpp.

References vpBasicFeature::flags, and vpBasicFeature::nbParameters.

void vpFeatureLine::setRhoTheta ( const double  rho,
const double  theta 
)

Sets the values of $ \rho $ and $ \theta $ which represent the parameters of the 2D line feature.

Parameters
rho: $ \rho $ value to set.
theta: $ \theta $ value to set.
Examples:
servoAfma6Cylinder2DCamVelocity.cpp, and servoAfma6Cylinder2DCamVelocitySecondaryTask.cpp.

Definition at line 124 of file vpFeatureLine.cpp.

References vpBasicFeature::flags, and vpBasicFeature::s.

Referenced by vpFeatureBuilder::create().

Member Data Documentation

vpBasicFeatureDeallocatorType vpBasicFeature::deallocate
protectedinherited

Definition at line 160 of file vpBasicFeature.h.

Referenced by vpFeatureVanishingPoint::interaction(), vpFeatureEllipse::interaction(), vpFeatureSegment::interaction(), vpFeatureDepth::interaction(), vpFeaturePoint::interaction(), interaction(), vpFeaturePoint3D::interaction(), vpFeatureThetaU::interaction(), vpFeaturePointPolar::interaction(), vpFeatureTranslation::interaction(), and vpBasicFeature::operator=().

unsigned int vpBasicFeature::dim_s
protectedinherited

Dimension of the visual feature.

Definition at line 102 of file vpBasicFeature.h.

Referenced by vpGenericFeature::duplicate(), vpFeatureMoment::duplicate(), vpFeatureLuminance::error(), vpBasicFeature::error(), vpGenericFeature::error(), vpBasicFeature::get_s(), vpGenericFeature::get_s(), vpBasicFeature::getDimension(), vpFeatureMoment::getDimension(), vpFeatureVanishingPoint::init(), vpFeatureEllipse::init(), vpFeatureLuminance::init(), vpFeatureSegment::init(), vpFeatureMoment::init(), vpFeatureDepth::init(), vpFeaturePoint::init(), init(), vpFeaturePoint3D::init(), vpFeaturePointPolar::init(), vpFeatureThetaU::init(), vpFeatureTranslation::init(), vpFeatureLuminance::interaction(), vpFeatureMoment::interaction(), vpGenericFeature::interaction(), vpFeatureLuminance::operator=(), vpBasicFeature::operator=(), vpGenericFeature::print(), vpFeatureMoment::print(), vpGenericFeature::set_s(), vpGenericFeature::setError(), vpGenericFeature::setInteractionMatrix(), vpFeatureMoment::update(), vpFeatureLuminance::vpFeatureLuminance(), and vpGenericFeature::vpGenericFeature().

const unsigned int vpBasicFeature::FEATURE_LINE
staticinherited
Initial value:
=
{
(unsigned int)(1 << 0), (unsigned int)(1 << 1),
(unsigned int)(1 << 2), (unsigned int)(1 << 3),
(unsigned int)(1 << 4), (unsigned int)(1 << 5),
(unsigned int)(1 << 6), (unsigned int)(1 << 7),
(unsigned int)(1 << 8), (unsigned int)(1 << 9),
(unsigned int)(1 << 10), (unsigned int)(1 << 11),
(unsigned int)(1 << 12), (unsigned int)(1 << 13),
(unsigned int)(1 << 14), (unsigned int)(1 << 15),
(unsigned int)(1 << 16), (unsigned int)(1 << 17),
(unsigned int)(1 << 18), (unsigned int)(1 << 19),
(unsigned int)(1 << 20), (unsigned int)(1 << 21),
(unsigned int)(1 << 22), (unsigned int)(1 << 23),
(unsigned int)(1 << 24), (unsigned int)(1 << 25),
(unsigned int)(1 << 26), (unsigned int)(1 << 27),
(unsigned int)(1 << 28), (unsigned int)(1 << 29),
(unsigned int)(1 << 30), (unsigned int)(1 << 31)
}

Definition at line 82 of file vpBasicFeature.h.

Referenced by vpBasicFeature::error(), vpGenericFeature::error(), vpBasicFeature::get_s(), vpBasicFeature::getDimension(), vpFeatureMoment::getDimension(), vpFeatureMoment::interaction(), vpGenericFeature::interaction(), vpGenericFeature::print(), vpFeatureMoment::print(), vpFeatureSegment::selectAlpha(), vpFeatureSegment::selectL(), vpFeatureEllipse::selectMu02(), vpFeatureEllipse::selectMu11(), vpFeatureEllipse::selectMu20(), selectRho(), vpFeaturePointPolar::selectRho(), selectTheta(), vpFeaturePointPolar::selectTheta(), vpFeatureThetaU::selectTUx(), vpFeatureThetaU::selectTUy(), vpFeatureThetaU::selectTUz(), vpFeatureTranslation::selectTx(), vpFeatureTranslation::selectTy(), vpFeatureTranslation::selectTz(), vpFeatureVanishingPoint::selectX(), vpFeatureEllipse::selectX(), vpFeaturePoint::selectX(), vpFeaturePoint3D::selectX(), vpFeatureSegment::selectXc(), vpFeatureVanishingPoint::selectY(), vpFeatureEllipse::selectY(), vpFeaturePoint::selectY(), vpFeaturePoint3D::selectY(), vpFeatureSegment::selectYc(), and vpFeaturePoint3D::selectZ().

bool* vpBasicFeature::flags
protectedinherited

Ensure that all the parameters needed to compute the iteraction matrix are set.

Definition at line 105 of file vpBasicFeature.h.

Referenced by vpFeatureEllipse::buildFrom(), vpFeatureVanishingPoint::buildFrom(), vpFeatureDepth::buildFrom(), vpFeaturePoint::buildFrom(), buildFrom(), vpFeaturePoint3D::buildFrom(), vpFeatureThetaU::buildFrom(), vpFeaturePointPolar::buildFrom(), vpFeatureTranslation::buildFrom(), vpFeatureMoment::duplicate(), vpFeatureVanishingPoint::init(), vpFeatureEllipse::init(), vpFeatureLuminance::init(), vpFeatureSegment::init(), vpFeatureMoment::init(), vpFeatureDepth::init(), vpFeaturePoint::init(), init(), vpFeaturePoint3D::init(), vpFeaturePointPolar::init(), vpFeatureThetaU::init(), vpFeatureTranslation::init(), vpFeatureVanishingPoint::interaction(), vpFeatureEllipse::interaction(), vpFeatureSegment::interaction(), vpFeatureDepth::interaction(), vpFeaturePoint::interaction(), interaction(), vpFeaturePoint3D::interaction(), vpFeatureThetaU::interaction(), vpFeaturePointPolar::interaction(), vpFeatureTranslation::interaction(), vpBasicFeature::operator=(), vpBasicFeature::resetFlags(), vpFeaturePointPolar::set_rho(), vpFeaturePointPolar::set_rhoThetaZ(), vpFeaturePointPolar::set_theta(), vpFeatureThetaU::set_TUx(), vpFeatureThetaU::set_TUy(), vpFeatureThetaU::set_TUz(), vpFeatureVanishingPoint::set_x(), vpFeatureEllipse::set_x(), vpFeatureDepth::set_x(), vpFeaturePoint::set_x(), vpFeaturePoint3D::set_X(), vpFeatureEllipse::set_xy(), vpFeaturePoint::set_xyZ(), vpFeaturePoint3D::set_XYZ(), vpFeatureDepth::set_xyZLogZoverZstar(), vpFeatureVanishingPoint::set_y(), vpFeatureEllipse::set_y(), vpFeatureDepth::set_y(), vpFeaturePoint::set_y(), vpFeaturePoint3D::set_Y(), vpFeatureLuminance::set_Z(), vpFeatureDepth::set_Z(), vpFeaturePoint::set_Z(), vpFeaturePoint3D::set_Z(), vpFeaturePointPolar::set_Z(), vpFeatureEllipse::setABC(), setABCD(), vpBasicFeature::setFlags(), vpFeatureEllipse::setMu(), setRhoTheta(), vpFeatureMoment::update(), vpFeatureLuminance::vpFeatureLuminance(), and vpBasicFeature::~vpBasicFeature().

unsigned int vpBasicFeature::nbParameters
protectedinherited

Number of parameters needed to compute the interaction matrix.

Definition at line 107 of file vpBasicFeature.h.

Referenced by vpFeatureVanishingPoint::buildFrom(), vpFeatureEllipse::buildFrom(), vpFeatureDepth::buildFrom(), vpFeaturePoint::buildFrom(), buildFrom(), vpFeaturePoint3D::buildFrom(), vpFeatureThetaU::buildFrom(), vpFeaturePointPolar::buildFrom(), vpFeatureMoment::duplicate(), vpFeatureVanishingPoint::init(), vpFeatureEllipse::init(), vpFeatureLuminance::init(), vpFeatureSegment::init(), vpFeatureMoment::init(), vpFeatureDepth::init(), vpFeaturePoint::init(), init(), vpFeaturePoint3D::init(), vpFeaturePointPolar::init(), vpFeatureThetaU::init(), vpFeatureTranslation::init(), vpFeatureVanishingPoint::interaction(), vpFeatureEllipse::interaction(), vpFeatureSegment::interaction(), vpFeatureDepth::interaction(), vpFeaturePoint::interaction(), interaction(), vpFeaturePoint3D::interaction(), vpFeatureThetaU::interaction(), vpFeaturePointPolar::interaction(), vpFeatureTranslation::interaction(), vpBasicFeature::operator=(), vpBasicFeature::resetFlags(), vpFeaturePointPolar::set_rhoThetaZ(), vpFeaturePoint::set_xyZ(), vpFeaturePoint3D::set_XYZ(), vpFeatureDepth::set_xyZLogZoverZstar(), vpFeatureEllipse::setABC(), setABCD(), vpBasicFeature::setFlags(), vpFeatureMoment::update(), and vpFeatureLuminance::vpFeatureLuminance().

vpColVector vpBasicFeature::s
protectedinherited

State of the visual feature.

Definition at line 100 of file vpBasicFeature.h.

Referenced by vpFeatureEllipse::buildFrom(), vpFeatureVanishingPoint::buildFrom(), vpFeatureLuminance::buildFrom(), vpFeatureDepth::buildFrom(), vpFeaturePoint::buildFrom(), buildFrom(), vpFeaturePoint3D::buildFrom(), vpFeatureThetaU::buildFrom(), vpFeaturePointPolar::buildFrom(), vpFeatureTranslation::buildFrom(), vpFeatureEllipse::display(), vpFeatureMoment::duplicate(), vpFeatureVanishingPoint::error(), vpFeatureEllipse::error(), vpFeatureLuminance::error(), vpBasicFeature::error(), vpFeatureMomentAlpha::error(), vpFeatureDepth::error(), vpGenericFeature::error(), vpFeaturePoint::error(), error(), vpFeaturePoint3D::error(), vpFeatureThetaU::error(), vpFeaturePointPolar::error(), vpFeatureTranslation::error(), vpFeatureDepth::get_LogZoverZstar(), vpFeaturePointPolar::get_rho(), vpBasicFeature::get_s(), vpGenericFeature::get_s(), vpFeaturePointPolar::get_theta(), vpFeatureThetaU::get_TUx(), vpFeatureThetaU::get_TUy(), vpFeatureThetaU::get_TUz(), vpFeatureTranslation::get_Tx(), vpFeatureTranslation::get_Ty(), vpFeatureTranslation::get_Tz(), vpFeatureVanishingPoint::get_x(), vpFeaturePoint::get_x(), vpFeaturePoint3D::get_X(), vpFeatureVanishingPoint::get_y(), vpFeaturePoint::get_y(), vpFeaturePoint3D::get_Y(), vpFeaturePoint3D::get_Z(), vpBasicFeature::getDimension(), vpFeatureVanishingPoint::init(), vpFeatureEllipse::init(), vpFeatureLuminance::init(), vpFeatureSegment::init(), vpFeatureMoment::init(), vpFeatureDepth::init(), vpGenericFeature::init(), vpFeaturePoint::init(), init(), vpFeaturePoint3D::init(), vpFeaturePointPolar::init(), vpFeatureThetaU::init(), vpFeatureTranslation::init(), vpFeatureEllipse::interaction(), interaction(), vpFeatureThetaU::interaction(), vpFeatureTranslation::interaction(), vpBasicFeature::operator=(), vpFeatureEllipse::print(), vpFeatureSegment::print(), vpGenericFeature::print(), vpFeatureMoment::print(), print(), vpFeatureThetaU::print(), vpFeatureTranslation::print(), vpFeatureDepth::set_LogZoverZstar(), vpFeaturePointPolar::set_rho(), vpGenericFeature::set_s(), vpFeaturePointPolar::set_theta(), vpFeatureThetaU::set_TUx(), vpFeatureThetaU::set_TUy(), vpFeatureThetaU::set_TUz(), vpFeatureTranslation::set_Tx(), vpFeatureTranslation::set_Ty(), vpFeatureTranslation::set_Tz(), vpFeatureVanishingPoint::set_x(), vpFeatureEllipse::set_x(), vpFeaturePoint::set_x(), vpFeaturePoint3D::set_X(), vpFeatureEllipse::set_xy(), vpFeatureVanishingPoint::set_y(), vpFeatureEllipse::set_y(), vpFeaturePoint::set_y(), vpFeaturePoint3D::set_Y(), vpFeaturePoint3D::set_Z(), vpFeatureEllipse::setMu(), setRhoTheta(), vpFeatureMoment::update(), and vpGenericFeature::vpGenericFeature().