vpMeNurbs Class Reference

#include <visp3/me/vpMeNurbs.h>

Inheritance diagram for vpMeNurbs:

Public Member Functions
	vpMeNurbs ()
	vpMeNurbs (const vpMeNurbs &menurbs)
void	setNbControlPoints (unsigned int nb_point)
void	setEnableCannyDetection (const bool enable_canny)
void	setCannyThreshold (float th1, float th2)
void	initTracking (const vpImage< unsigned char > &I)
void	initTracking (const vpImage< unsigned char > &I, const std::list< vpImagePoint > &ptList)
void	track (const vpImage< unsigned char > &I)
virtual void	sample (const vpImage< unsigned char > &I, bool doNotTrack=false)
void	reSample (const vpImage< unsigned char > &I)
void	updateDelta ()
void	seekExtremities (const vpImage< unsigned char > &I)
void	seekExtremitiesCanny (const vpImage< unsigned char > &I)
void	suppressPoints ()
void	supressNearPoints ()
void	localReSample (const vpImage< unsigned char > &I)
vpNurbs	getNurbs () const
void	display (const vpImage< unsigned char > &I, const vpColor &color, unsigned int thickness=1)
Public Member Functions Inherited from vpTracker
vpColVector	get_p () const
vpColVector	get_cP () const

Static Public Member Functions
static void	display (const vpImage< unsigned char > &I, vpNurbs &n, const vpColor &color=vpColor::green, unsigned int thickness=1)
static void	display (const vpImage< vpRGBa > &I, vpNurbs &n, const vpColor &color=vpColor::green, unsigned int thickness=1)
Deprecated functions
static vp_deprecated bool	inMask (const vpImage< bool > *mask, unsigned int i, unsigned int j)

Public Attributes
vpNurbs	nurbs
Public Attributes Inherited from vpTracker
vpColVector	p
vpColVector	cP
bool	cPAvailable

Protected Attributes
Protected Attributes Inherited from vpMeTracker
std::list< vpMeSite >	m_meList
vpMe *	m_me
unsigned int	m_init_range
int	m_nGoodElement
const vpImage< bool > *	m_mask
const vpImage< bool > *	m_maskCandidates
vpMeSite::vpMeSiteDisplayType	m_selectDisplay

Public Member Functions Inherited from vpMeTracker
void	display (const vpImage< unsigned char > &I)
void	display (const vpImage< vpRGBa > &I)
void	display (const vpImage< unsigned char > &I, vpColVector &w, unsigned int &index_w)
unsigned int	getInitRange ()
vpMe *	getMe ()
std::list< vpMeSite > &	getMeList ()
std::list< vpMeSite >	getMeList () const
int	getNbPoints () const
void	init ()
unsigned int	numberOfSignal ()
bool	outOfImage (int i, int j, int border, int nrows, int ncols)
bool	outOfImage (const vpImagePoint &iP, int border, int nrows, int ncols)
void	reset ()
void	setDisplay (vpMeSite::vpMeSiteDisplayType select)
void	setInitRange (const unsigned int &r)
virtual void	setMask (const vpImage< bool > &mask)
virtual void	setMaskCandidates (const vpImage< bool > *maskCandidates)
void	setMe (vpMe *me)
void	setMeList (const std::list< vpMeSite > &meList)
unsigned int	totalNumberOfSignal ()
static bool	inRoiMask (const vpImage< bool > *mask, unsigned int i, unsigned int j)
static bool	inMeMaskCandidates (const vpImage< bool > *meMaskCandidates, unsigned int i, unsigned int j)

Detailed Description

Class that tracks in an image a edge defined by a Nurbs.

The advantage of this class is that it enables to track an edge whose equation is not known in advance. At each iteration, the Nurbs corresponding to the edge is computed.

It is possible to have a direct access to the nurbs. It is indeed a public parameter.

The code below shows how to use this class.

#include <visp3/core/vpImage.h>
#include <visp3/core/vpImagePoint.h>
#include <visp3/me/vpMeNurbs.h>
 
int main()
{
  vpImage<unsigned char> I(240, 320);
 
  // Fill the image with a black rectangle
  I = 0;
  for (int i = 100; i < 180; i ++) {
    for (int j = 0; j < 320; j ++) {
      I[i][j] = 255;
    }
  }
 
  // Set the moving-edges tracker parameters
  vpMe me;
  me.setRange(25);
  me.setPointsToTrack(20);
  me.setLikelihoodThresholdType(vpMe::NORMALIZED_THRESHOLD);
  me.setThreshold(20);
  me.setSampleStep(10);
 
  // Initialize the moving-edges tracker parameters
  vpMeNurbs meNurbs;
  meNurbs.setNbControlPoints(4);
  meNurbs.setMe(&me);
 
  // Initialize the location of the edge to track (here a horizontal line
  std::list<vpImagePoint> ipList; //List of points belonging to the edge
  ipList.push_back(vpImagePoint(110,119));
  ipList.push_back(vpImagePoint(140,119));
  ipList.push_back(vpImagePoint(160,119));
  ipList.push_back(vpImagePoint(170,119));
 
  meNurbs.initTracking(I, ipList);
 
  while ( 1 )
  {
    // ... Here the code to read or grab the next image.
 
    // Track the line.
    meNurbs.track(I);
  }
  return 0;
}

Note

It is possible to display the nurbs as an overlay. For that you must use the display function of the class vpMeNurbs.

In case of an edge which is not smooth, it can be interesting to use the canny detection to find the extremities. In this case, use the method setEnableCannyDetection to enable it.

Warning

: This function requires OpenCV.

Examples

trackMeNurbs.cpp.

Definition at line 127 of file vpMeNurbs.h.

Constructor & Destructor Documentation

vpMeNurbs() [1/2]

vpMeNurbs::vpMeNurbs

(

)

Basic constructor that calls the constructor of the class vpMeTracker.

Definition at line 183 of file vpMeNurbs.cpp.

vpMeNurbs() [2/2]

vpMeNurbs::vpMeNurbs

(

const vpMeNurbs &

menurbs

)

Copy constructor.

Definition at line 188 of file vpMeNurbs.cpp.

Member Function Documentation

display() [1/6]

void vpMeTracker::display ( const vpImage< unsigned char > &  I )

inherited

Display the moving edge sites with a color corresponding to their state.

• If green : The vpMeSite is a good point.
• If blue : The point is removed because of the vpMeSite tracking phase (contrast problem).
• If purple : The point is removed because of the vpMeSite tracking phase (threshold problem).
• If red : The point is removed because of the robust method in the virtual visual servoing (M-Estimator problem).
• If cyan : The point is removed because it's too close to another.
• Yellow otherwise.

Parameters

I	: The image.

Definition at line 258 of file vpMeTracker.cpp.

References vpMeSite::display(), and vpMeTracker::m_meList.

Referenced by vpMeTracker::display(), vpMeEllipse::initTracking(), vpMeEllipse::track(), and vpMeLine::track().

display() [2/6]

void vpMeNurbs::display	(	const vpImage< unsigned char > &	I,
		const vpColor &	color,
		unsigned int	thickness = 1
	)

Display edge.

Warning

To effectively display the edge a call to vpDisplay::flush() is needed.

Parameters

I	: Image in which the edge appears.
color	: Color of the displayed line.
thickness	: Drawings thickness.

Examples

trackMeNurbs.cpp.

Definition at line 857 of file vpMeNurbs.cpp.

References nurbs.

display() [3/6]

void vpMeTracker::display ( const vpImage< unsigned char > &  I, vpColVector &  w, unsigned int &  index_w  )

inherited

Displays the status of moving edge sites

Parameters

I	: The image.
w	: vector
index_w	: index

Definition at line 276 of file vpMeTracker.cpp.

References vpMeTracker::display(), vpMeSite::getState(), vpMeTracker::m_meList, vpMeSite::NO_SUPPRESSION, and vpMeSite::setWeight().

display() [4/6]

void vpMeNurbs::display ( const vpImage< unsigned char > &  I, vpNurbs &  n, const vpColor &  color = vpColor::green, unsigned int  thickness = 1  )

static

Display of a moving nurbs.

Parameters

I	: The image used as background.
n	: Nurbs to display
color	: Color used to display the nurbs.
thickness	: Drawings thickness.

Definition at line 1076 of file vpMeNurbs.cpp.

References vpNurbs::computeCurvePoint(), and vpDisplay::displayCross().

display() [5/6]

void vpMeTracker::display ( const vpImage< vpRGBa > &  I )

inherited

Display the moving edge sites with a color corresponding to their state.

• If green : The vpMeSite is a good point.
• If blue : The point is removed because of the vpMeSite tracking phase (contrast problem).
• If purple : The point is removed because of the vpMeSite tracking phase (threshold problem).
• If red : The point is removed because of the robust method in the virtual visual servoing (M-Estimator problem).
• If cyan : The point is removed because it's too close to another.
• Yellow otherwise.

Parameters

I	: The image.

Definition at line 267 of file vpMeTracker.cpp.

References vpMeSite::display(), and vpMeTracker::m_meList.

display() [6/6]

void vpMeNurbs::display ( const vpImage< vpRGBa > &  I, vpNurbs &  n, const vpColor &  color = vpColor::green, unsigned int  thickness = 1  )

static

Display of a moving nurbs.

Parameters

I	: The image used as background.
n	: Nurbs to display
color	: Color used to display the nurbs.
thickness	: Drawings thickness.

Definition at line 1087 of file vpMeNurbs.cpp.

References vpNurbs::computeCurvePoint(), and vpDisplay::displayCross().

get_cP()

vpColVector vpTracker::get_cP ( ) const

inlineinherited

Return object parameters expressed in the 3D camera frame.

Definition at line 93 of file vpTracker.h.

get_p()

vpColVector vpTracker::get_p ( ) const

inlineinherited

Return object parameters expressed in the 2D image plane computed by perspective projection.

Definition at line 91 of file vpTracker.h.

getInitRange()

unsigned int vpMeTracker::getInitRange ( )

inlineinherited

Return the initial range.

Returns

Value of init_range.

Definition at line 164 of file vpMeTracker.h.

getMe()

vpMe* vpMeTracker::getMe ( )

inlineinherited

Return the moving edges initialisation parameters.

Returns

Moving Edges.

Examples

trackMeCircle.cpp, and trackMeEllipse.cpp.

Definition at line 171 of file vpMeTracker.h.

getMeList() [1/2]

std::list<vpMeSite>& vpMeTracker::getMeList ( )

inlineinherited

Return the list of moving edges

Returns

List of Moving Edges.

Definition at line 178 of file vpMeTracker.h.

getMeList() [2/2]

std::list<vpMeSite> vpMeTracker::getMeList ( ) const

inlineinherited

Return the list of moving edges

Returns

List of Moving Edges.

Definition at line 185 of file vpMeTracker.h.

getNbPoints()

int vpMeTracker::getNbPoints ( ) const

inlineinherited

Return the number of points that has not been suppressed.

Returns

Number of good points.

Definition at line 192 of file vpMeTracker.h.

getNurbs()

vpNurbs vpMeNurbs::getNurbs ( ) const

inline

Gets the nurbs;

Definition at line 294 of file vpMeNurbs.h.

init()

void vpMeTracker::init ( void  )

inherited

Initialize the tracker.

Definition at line 50 of file vpMeTracker.cpp.

References vpTracker::init(), vpMeTracker::m_selectDisplay, vpMeSite::NONE, vpTracker::p, and vpColVector::resize().

Referenced by vpMeTracker::vpMeTracker().

initTracking() [1/2]

void vpMeNurbs::initTracking

(

const vpImage< unsigned char > &

I

)

Initialization of the tracking. Ask the user to click left on several points along the edge to track and click right at the end.

Parameters

I	: Image in which the edge appears.

Examples

trackMeNurbs.cpp.

Definition at line 201 of file vpMeNurbs.cpp.

References vpMouseButton::button1, vpMouseButton::button3, vpDisplay::displayCross(), vpDisplay::flush(), vpDisplay::getClick(), vpColor::green, and vpException::notInitialized.

initTracking() [2/2]

void vpMeNurbs::initTracking	(	const vpImage< unsigned char > &	I,
		const std::list< vpImagePoint > &	ptList
	)

Initialization of the tracking. The Nurbs is initialized thanks to the list of vpImagePoint.

Parameters

I	: Image in which the edge appears.
ptList	: List of point to initialize the Nurbs.

Definition at line 223 of file vpMeNurbs.cpp.

References vpNurbs::globalCurveInterp(), vpMeTracker::initTracking(), nurbs, sample(), and track().

inMask()

static vp_deprecated bool vpMeTracker::inMask ( const vpImage< bool > *  mask, unsigned int  i, unsigned int  j  )

inlinestaticinherited

Deprecated:

You should rather use inRoiMask(). Test whether the pixel is inside the region of interest mask. Mask values that are set to true are considered in the tracking.

Parameters

mask	Mask corresponding to the region of interest in the image or nullptr if not wanted. Mask values that are set to true are considered in the tracking. To disable a pixel, set false.
i	: Pixel coordinate along the rows.
j	: Pixel coordinate along the columns.

Definition at line 317 of file vpMeTracker.h.

inMeMaskCandidates()

bool vpMeTracker::inMeMaskCandidates ( const vpImage< bool > *  meMaskCandidates, unsigned int  i, unsigned int  j  )

staticinherited

Test whether the moving-edge (ME) is inside the mask of ME candidates for the initialization. Mask values that are set to true and their 8 neighbors are considered for the initialization.

Parameters

meMaskCandidates	Mask corresponding the ME location in the image or nullptr if not wanted. Mask values that are set to true are considered for the initialization. To disable a pixel, set false.
i	: ME coordinate along the rows.
j	: ME coordinate along the columns.

Definition at line 116 of file vpMeTracker.cpp.

References vpImage< Type >::getCols(), and vpImage< Type >::getRows().

Referenced by vpMeEllipse::sample(), vpMeLine::sample(), and vpMeLine::seekExtremities().

inRoiMask()

bool vpMeTracker::inRoiMask ( const vpImage< bool > *  mask, unsigned int  i, unsigned int  j  )

staticinherited

Test whether the pixel is inside the region of interest mask. Mask values that are set to true are considered in the tracking.

Parameters

mask	Mask corresponding to the region of interest in the image or nullptr if not wanted. Mask values that are set to true are considered in the tracking. To disable a pixel, set false.
i	: Pixel coordinate along the rows.
j	: Pixel coordinate along the columns.

Definition at line 106 of file vpMeTracker.cpp.

References vpImage< Type >::getValue().

Referenced by vpMbtFaceDepthDense::computeDesiredFeatures(), vpMbtFaceDepthNormal::computeDesiredFeatures(), vpMbtDistanceKltPoints::computeNbDetectedCurrent(), vpMbtDistanceKltPoints::init(), vpMeEllipse::plugHoles(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), and vpMeTracker::track().

localReSample()

void vpMeNurbs::localReSample

(

const vpImage< unsigned char > &

I

)

Resample a part of the edge if two vpMeSite are too far from each other. In this case the method try to initialize any vpMeSite between the two points.

Parameters

I	: Image in which the edge appears.

Definition at line 700 of file vpMeNurbs.cpp.

References vpNurbs::computeCurveDersPoint(), vpNurbs::computeCurvePoint(), vpImage< Type >::getHeight(), vpMe::getPointsToTrack(), vpMe::getRange(), vpMe::getSampleStep(), vpMeSite::getState(), vpImage< Type >::getWidth(), vpMeSite::init(), vpMeSite::m_ifloat, vpMeSite::m_jfloat, vpMeTracker::m_me, vpMeTracker::m_meList, vpMeTracker::m_selectDisplay, vpMath::maximum(), vpMeSite::NO_SUPPRESSION, vpMeTracker::numberOfSignal(), nurbs, vpMeTracker::outOfImage(), vpMeSite::setDisplay(), vpMe::setRange(), vpMath::sqr(), vpImagePoint::sqrDistance(), vpMeSite::sqrDistance(), and vpMeSite::track().

Referenced by track().

numberOfSignal()

unsigned int vpMeTracker::numberOfSignal ( )

inherited

Return number of moving-edges that are tracked.

Definition at line 95 of file vpMeTracker.cpp.

References vpMeTracker::m_meList.

Referenced by vpMeLine::leastSquare(), vpMeEllipse::leastSquareRobust(), localReSample(), vpMeLine::reSample(), and reSample().

outOfImage() [1/2]

bool vpMeTracker::outOfImage ( const vpImagePoint &  iP, int  border, int  nrows, int  ncols  )

inherited

Check if a pixel i,j is out of the image.

Parameters

[in]	iP	: Pixel coordinates.
[in]	border	: Number of pixels along the image border to exclude. When border is set to 0, consider the complete image.
[in]	nrows,ncols	: Size of the image.

Returns

true when the pixel is inside the image minus the border size, false otherwise.

Definition at line 175 of file vpMeTracker.cpp.

References vpImagePoint::get_i(), vpImagePoint::get_j(), and vpMath::round().

outOfImage() [2/2]

bool vpMeTracker::outOfImage ( int  i, int  j, int  border, int  nrows, int  ncols  )

inherited

Check if a pixel i,j is out of the image.

Parameters

[in]	i,j	: Pixel coordinates.
[in]	border	: Number of pixels along the image border to exclude. When border is set to 0, consider the complete image.
[in]	nrows,ncols	: Size of the image.

Returns

true when the pixel is inside the image minus the border size, false otherwise.

Definition at line 167 of file vpMeTracker.cpp.

Referenced by localReSample(), vpMeEllipse::plugHoles(), sample(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), and seekExtremities().

reSample()

void vpMeNurbs::reSample

(

const vpImage< unsigned char > &

I

)

Resample the edge if the number of sample is less than 70% of the expected value.

Note

The expected value is computed thanks to the length of the nurbs and the parameter which indicates the number of pixel between two points (vpMe::sample_step).

Parameters

I	: Image in which the edge appears.

Definition at line 689 of file vpMeNurbs.cpp.

References vpMe::getSampleStep(), vpMeTracker::initTracking(), vpMeTracker::m_me, vpMeTracker::numberOfSignal(), and sample().

Referenced by track().

reset()

void vpMeTracker::reset ( )

inherited

Reset the tracker by removing all the moving edges.

Definition at line 75 of file vpMeTracker.cpp.

References vpMeTracker::m_meList, and vpMeTracker::m_nGoodElement.

Referenced by vpMeTracker::~vpMeTracker().

sample()

void vpMeNurbs::sample ( const vpImage< unsigned char > &  I, bool  doNotTrack = false  )

virtual

Construct a list of vpMeSite moving edges at a particular sampling step between the two extremities of the nurbs.

Parameters

I	: Image in which the edge appears.
doNotTrack	: Inherited parameter, not used.

Implements vpMeTracker.

Definition at line 233 of file vpMeNurbs.cpp.

References vpNurbs::computeCurveDersPoint(), vpImage< Type >::getHeight(), vpMe::getPointsToTrack(), vpMe::getSampleStep(), vpImage< Type >::getWidth(), vpMeSite::init(), vpMeTracker::m_me, vpMeTracker::m_meList, vpMeTracker::m_selectDisplay, nurbs, vpMeTracker::outOfImage(), vpMeSite::setDisplay(), vpMath::sqr(), and vpImagePoint::sqrDistance().

Referenced by initTracking(), and reSample().

seekExtremities()

void vpMeNurbs::seekExtremities

(

const vpImage< unsigned char > &

I

)

Seek along the edge defined by the nurbs, the two extremities of the edge. This function is useful in case of translation of the edge.

Parameters

I	: Image in which the edge appears.

Definition at line 318 of file vpMeNurbs.cpp.

References vpMath::abs(), vpColor::blue, vpNurbs::computeCurveDersPoint(), vpDisplay::displayCross(), vpImagePoint::distance(), vpMeSite::get_i(), vpMeSite::get_j(), vpImage< Type >::getHeight(), vpMe::getRange(), vpMe::getSampleStep(), vpMeSite::getState(), vpImage< Type >::getWidth(), vpMeSite::init(), vpMeSite::m_i, vpMeSite::m_ifloat, vpMeSite::m_j, vpMeSite::m_jfloat, vpMeTracker::m_me, vpMeTracker::m_meList, vpMeTracker::m_selectDisplay, vpMeSite::NO_SUPPRESSION, nurbs, vpMeTracker::outOfImage(), vpImagePoint::set_ij(), vpMeSite::setDisplay(), vpMe::setRange(), vpMath::sign(), vpMeSite::track(), and vpDEBUG_ENABLE.

Referenced by track().

seekExtremitiesCanny()

void vpMeNurbs::seekExtremitiesCanny

(

const vpImage< unsigned char > &

I

)

Seek the extremities of the edge thanks to a canny edge detection. The edge detection enable to find the points belonging to the edge. The any vpMeSite are initialized at this points.

This method is useful when the edge is not smooth.

Note

To use the canny detection, OpenCV has to be installed.

Parameters

I	: Image in which the edge appears.

Definition at line 428 of file vpMeNurbs.cpp.

References vpImageFilter::canny(), vpNurbs::computeCurveDersPoint(), vpNurbs::computeCurvePoint(), vpImageTools::crop(), vpDisplay::displayPoint(), vpDisplay::displayRectangle(), vpImagePoint::get_i(), vpImagePoint::get_j(), vpImage< Type >::getHeight(), vpMe::getRange(), vpMe::getSampleStep(), vpImage< Type >::getWidth(), vpColor::green, vpMeSite::init(), vpMeSite::m_ifloat, vpMeSite::m_jfloat, vpMeTracker::m_me, vpMeTracker::m_meList, vpMeTracker::m_selectDisplay, vpMath::maximum(), nurbs, vpColor::orange, vpMeSite::setDisplay(), vpMe::setRange(), vpMath::sqr(), vpMeSite::sqrDistance(), and vpMeSite::track().

Referenced by track().

setCannyThreshold()

void vpMeNurbs::setCannyThreshold ( float  th1, float  th2  )

inline

Enables to set the two thresholds use by the canny detection.

Parameters

th1	: The first threshold;
th2	: The second threshold;

Definition at line 188 of file vpMeNurbs.h.

setDisplay()

void vpMeTracker::setDisplay ( vpMeSite::vpMeSiteDisplayType  select )

inlineinherited

Set type of moving-edges display.

Parameters

select

: Display type selector.

Examples

servoAfma6Cylinder2DCamVelocity.cpp, servoAfma6Cylinder2DCamVelocitySecondaryTask.cpp, servoAfma6Line2DCamVelocity.cpp, servoAfma6SquareLines2DCamVelocity.cpp, servoAfma6TwoLines2DCamVelocity.cpp, trackMeCircle.cpp, trackMeEllipse.cpp, trackMeLine.cpp, trackMeNurbs.cpp, tutorial-me-ellipse-tracker.cpp, and tutorial-me-line-tracker.cpp.

Definition at line 250 of file vpMeTracker.h.

setEnableCannyDetection()

void vpMeNurbs::setEnableCannyDetection ( const bool  enable_canny )

inline

Enables or disables the canny detection used during the extremities search.

Parameters

enable_canny

: if true it enables the canny detection.

Definition at line 180 of file vpMeNurbs.h.

setInitRange()

void vpMeTracker::setInitRange ( const unsigned int &  r )

inlineinherited

Set the initial range.

Parameters

r	: initial range.

Definition at line 257 of file vpMeTracker.h.

setMask()

virtual void vpMeTracker::setMask ( const vpImage< bool > &  mask )

inlinevirtualinherited

Set the mask.

Parameters

mask

: Mask.

Definition at line 264 of file vpMeTracker.h.

setMaskCandidates()

virtual void vpMeTracker::setMaskCandidates ( const vpImage< bool > *  maskCandidates )

inlinevirtualinherited

Set the mask of candidates points for initialization.

Parameters

maskCandidates

: Pointer towards the mask of candidates points for initialization.

Definition at line 271 of file vpMeTracker.h.

setMe()

void vpMeTracker::setMe ( vpMe *  me )

inlineinherited

Set the moving edges initialisation parameters.

Parameters

me	: Moving Edges.

Examples

servoAfma62DhalfCamVelocity.cpp, servoAfma6Cylinder2DCamVelocity.cpp, servoAfma6Cylinder2DCamVelocitySecondaryTask.cpp, servoAfma6Line2DCamVelocity.cpp, servoAfma6SquareLines2DCamVelocity.cpp, servoAfma6TwoLines2DCamVelocity.cpp, trackMeCircle.cpp, trackMeEllipse.cpp, trackMeLine.cpp, trackMeNurbs.cpp, tutorial-me-ellipse-tracker.cpp, and tutorial-me-line-tracker.cpp.

Definition at line 278 of file vpMeTracker.h.

setMeList()

void vpMeTracker::setMeList ( const std::list< vpMeSite > &  meList )

inlineinherited

Set the list of moving edges.

Parameters

meList

: List of Moving Edges.

Definition at line 285 of file vpMeTracker.h.

setNbControlPoints()

void vpMeNurbs::setNbControlPoints ( unsigned int  nb_point )

inline

Sets the number of control points used to compute the Nurbs.

Parameters

nb_point

: The number of control points used to compute the Nurbs.

Examples

trackMeNurbs.cpp.

Definition at line 172 of file vpMeNurbs.h.

suppressPoints()

void vpMeNurbs::suppressPoints

(

)

Suppression of the points which:

• belong no more to the edge.
• which are to closed to another point.

Definition at line 268 of file vpMeNurbs.cpp.

References vpMeSite::getState(), vpMeTracker::m_meList, and vpMeSite::NO_SUPPRESSION.

Referenced by track().

supressNearPoints()

void vpMeNurbs::supressNearPoints

(

)

Suppress vpMeSites if they are too close to each other.

The goal is to keep the order of the vpMeSites in the list.

Definition at line 784 of file vpMeNurbs.cpp.

References vpMe::getSampleStep(), vpMeTracker::m_me, vpMeTracker::m_meList, vpMeSite::setState(), vpMath::sqr(), vpMeSite::sqrDistance(), and vpMeSite::TOO_NEAR.

Referenced by track().

totalNumberOfSignal()

unsigned int vpMeTracker::totalNumberOfSignal ( )

inherited

Return the total number of moving-edges.

Definition at line 104 of file vpMeTracker.cpp.

References vpMeTracker::m_meList.

track()

void vpMeNurbs::track

(

const vpImage< unsigned char > &

I

)

Track the edge in the image I.

Parameters

I	: Image in which the edge appears.

Examples

trackMeNurbs.cpp.

Definition at line 811 of file vpMeNurbs.cpp.

References vpNurbs::computeCurvePoint(), vpImagePoint::distance(), vpNurbs::globalCurveApprox(), localReSample(), vpMeTracker::m_meList, vpTrackingException::notEnoughPointError, nurbs, reSample(), seekExtremities(), seekExtremitiesCanny(), suppressPoints(), supressNearPoints(), vpMeTracker::track(), and updateDelta().

Referenced by initTracking().

updateDelta()

void vpMeNurbs::updateDelta

(

)

Set the alpha value (normal to the edge at this point) of the different vpMeSite to a value computed thanks to the nurbs.

Definition at line 281 of file vpMeNurbs.cpp.

References vpNurbs::computeCurveDersPoint(), vpNurbs::computeCurvePoint(), vpImagePoint::distance(), vpMeSite::get_i(), vpMeSite::get_j(), vpMeTracker::m_meList, nurbs, and vpMeSite::setAlpha().

Referenced by track().

Member Data Documentation

cP

vpColVector vpTracker::cP

inherited

Feature coordinates expressed in the camera frame cP.

Definition at line 71 of file vpTracker.h.

Referenced by vpFeaturePoint3D::buildFrom(), vpCircle::changeFrame(), vpCylinder::changeFrame(), vpLine::changeFrame(), vpPoint::changeFrame(), vpSphere::changeFrame(), vpFeatureBuilder::create(), vpPoint::get_W(), vpPoint::get_X(), vpPoint::get_Y(), vpPoint::get_Z(), vpCircle::init(), vpCylinder::init(), vpLine::init(), vpPoint::init(), vpSphere::init(), vpMbtPolygon::isVisible(), vpTracker::operator=(), vpForwardProjection::print(), vpPose::printPoint(), vpForwardProjection::project(), vpCircle::projection(), vpCylinder::projection(), vpLine::projection(), vpPoint::projection(), vpSphere::projection(), vpPoint::set_W(), vpPoint::set_X(), vpPoint::set_Y(), and vpPoint::set_Z().

cPAvailable

bool vpTracker::cPAvailable

inherited

Flag used to indicate if the feature parameters cP expressed in the camera frame are available.

Definition at line 77 of file vpTracker.h.

Referenced by vpTracker::init(), and vpTracker::operator=().

m_init_range

unsigned int vpMeTracker::m_init_range

protectedinherited

Initial range.

Definition at line 70 of file vpMeTracker.h.

Referenced by vpMeTracker::initTracking(), vpMeTracker::operator=(), and vpMeTracker::vpMeTracker().

m_mask

const vpImage<bool>* vpMeTracker::m_mask

protectedinherited

Mask used to disable tracking on a part of image.

Definition at line 74 of file vpMeTracker.h.

Referenced by vpMeEllipse::plugHoles(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), and vpMeTracker::track().

m_maskCandidates

const vpImage<bool>* vpMeTracker::m_maskCandidates

protectedinherited

Mask used to determine candidate points for initialization in an image.

Definition at line 76 of file vpMeTracker.h.

Referenced by vpMeEllipse::sample(), vpMeLine::sample(), and vpMeLine::seekExtremities().

m_me

vpMe* vpMeTracker::m_me

protectedinherited

Moving edges initialisation parameters.

Definition at line 68 of file vpMeTracker.h.

Referenced by vpMeTracker::initTracking(), vpMeEllipse::leastSquareRobust(), localReSample(), vpMeTracker::operator=(), vpMeEllipse::plugHoles(), vpMeLine::reSample(), reSample(), sample(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), seekExtremities(), seekExtremitiesCanny(), supressNearPoints(), vpMeTracker::track(), and vpMeTracker::vpMeTracker().

m_meList

std::list<vpMeSite> vpMeTracker::m_meList

protectedinherited

Tracking dependent variables/functions List of tracked moving edges points.

Definition at line 66 of file vpMeTracker.h.

Referenced by vpMeTracker::display(), vpMeLine::display(), vpMeTracker::initTracking(), vpMeLine::leastSquare(), vpMeEllipse::leastSquareRobust(), localReSample(), vpMeTracker::numberOfSignal(), vpMeTracker::operator=(), vpMeEllipse::plugHoles(), vpMeTracker::reset(), sample(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), seekExtremities(), seekExtremitiesCanny(), vpMeLine::setExtremities(), vpMeLine::suppressPoints(), suppressPoints(), supressNearPoints(), vpMeTracker::totalNumberOfSignal(), track(), vpMeTracker::track(), vpMeLine::updateDelta(), updateDelta(), vpMeEllipse::updateTheta(), vpMeTracker::vpMeTracker(), vpMeEllipse::~vpMeEllipse(), and vpMeLine::~vpMeLine().

m_nGoodElement

int vpMeTracker::m_nGoodElement

protectedinherited

Number of good moving-edges that are tracked.

Definition at line 72 of file vpMeTracker.h.

Referenced by vpMeTracker::initTracking(), vpMeTracker::operator=(), vpMeTracker::reset(), vpMeTracker::track(), and vpMeTracker::vpMeTracker().

m_selectDisplay

vpMeSite::vpMeSiteDisplayType vpMeTracker::m_selectDisplay

protectedinherited

Moving-edges display type.

Definition at line 78 of file vpMeTracker.h.

Referenced by vpMeTracker::init(), localReSample(), vpMeTracker::operator=(), vpMeEllipse::plugHoles(), sample(), vpMeEllipse::sample(), vpMeLine::sample(), vpMeLine::seekExtremities(), seekExtremities(), seekExtremitiesCanny(), and vpMeTracker::vpMeTracker().

nurbs

vpNurbs vpMeNurbs::nurbs

The Nurbs which represents the tracked edge.

Definition at line 135 of file vpMeNurbs.h.

Referenced by display(), initTracking(), localReSample(), sample(), seekExtremities(), seekExtremitiesCanny(), track(), and updateDelta().

p

vpColVector vpTracker::p

inherited

Feature coordinates expressed in the image plane p. They correspond to 2D normalized coordinates expressed in meters.

Definition at line 67 of file vpTracker.h.

Referenced by vpMbtDistanceCircle::computeInteractionMatrixError(), vpCircle::computeIntersectionPoint(), vpMeterPixelConversion::convertEllipse(), vpFeatureBuilder::create(), vpCircle::display(), vpCylinder::display(), vpLine::display(), vpPoint::display(), vpSphere::display(), vpProjectionDisplay::display(), vpProjectionDisplay::displayCamera(), vpFeatureDisplay::displayEllipse(), vpPose::displayModel(), vpImageDraw::drawFrame(), vpPoint::get_w(), vpPoint::get_x(), vpPoint::get_y(), vpMeTracker::init(), vpCircle::init(), vpCylinder::init(), vpLine::init(), vpPoint::init(), vpSphere::init(), vpTracker::operator=(), vpForwardProjection::print(), vpPose::printPoint(), vpForwardProjection::project(), vpCircle::projection(), vpCylinder::projection(), vpLine::projection(), vpPoint::projection(), vpSphere::projection(), vpPoint::set_w(), vpPoint::set_x(), and vpPoint::set_y().