SampleConsensusModelEllipse3D defines a model for 3D ellipse segmentation. More...

#include <pcl/sample_consensus/sac_model_ellipse3d.h>

Inheritance diagram for pcl::SampleConsensusModelEllipse3D< PointT >:

Collaboration diagram for pcl::SampleConsensusModelEllipse3D< PointT >:

Public Types
using	PointCloud = typename SampleConsensusModel< PointT >::PointCloud

using	PointCloudPtr = typename SampleConsensusModel< PointT >::PointCloudPtr

using	PointCloudConstPtr = typename SampleConsensusModel< PointT >::PointCloudConstPtr

using	Ptr = shared_ptr< SampleConsensusModelEllipse3D< PointT > >

using	ConstPtr = shared_ptr< const SampleConsensusModelEllipse3D< PointT > >

Public Types inherited from pcl::SampleConsensusModel< PointT >
using	PointCloud = pcl::PointCloud< PointT >

using	PointCloudConstPtr = typename PointCloud::ConstPtr

using	PointCloudPtr = typename PointCloud::Ptr

using	SearchPtr = typename pcl::search::Search< PointT >::Ptr

using	Ptr = shared_ptr< SampleConsensusModel< PointT > >

using	ConstPtr = shared_ptr< const SampleConsensusModel< PointT > >

Public Member Functions
	SampleConsensusModelEllipse3D (const PointCloudConstPtr &cloud, bool random=false)
	Constructor for base SampleConsensusModelEllipse3D. More...

	SampleConsensusModelEllipse3D (const PointCloudConstPtr &cloud, const Indices &indices, bool random=false)
	Constructor for base SampleConsensusModelEllipse3D. More...

	~SampleConsensusModelEllipse3D () override=default
	Empty destructor. More...

	SampleConsensusModelEllipse3D (const SampleConsensusModelEllipse3D &source)
	Copy constructor. More...

SampleConsensusModelEllipse3D &	operator= (const SampleConsensusModelEllipse3D &source)
	Copy constructor. More...

bool	computeModelCoefficients (const Indices &samples, Eigen::VectorXf &model_coefficients) const override
	Check whether the given index samples can form a valid 3D ellipse model, compute the model coefficients from these samples and store them in model_coefficients. More...

void	getDistancesToModel (const Eigen::VectorXf &model_coefficients, std::vector< double > &distances) const override
	Compute all distances from the cloud data to a given 3D ellipse model. More...

void	selectWithinDistance (const Eigen::VectorXf &model_coefficients, const double threshold, Indices &inliers) override
	Compute all distances from the cloud data to a given 3D ellipse model. More...

std::size_t	countWithinDistance (const Eigen::VectorXf &model_coefficients, const double threshold) const override
	Count all the points which respect the given model coefficients as inliers. More...

void	optimizeModelCoefficients (const Indices &inliers, const Eigen::VectorXf &model_coefficients, Eigen::VectorXf &optimized_coefficients) const override
	Recompute the 3d ellipse coefficients using the given inlier set and return them to the user. More...

void	projectPoints (const Indices &inliers, const Eigen::VectorXf &model_coefficients, PointCloud &projected_points, bool copy_data_fields=true) const override
	Create a new point cloud with inliers projected onto the 3d ellipse model. More...

bool	doSamplesVerifyModel (const std::set< index_t > &indices, const Eigen::VectorXf &model_coefficients, const double threshold) const override
	Verify whether a subset of indices verifies the given 3d ellipse model coefficients. More...

pcl::SacModel	getModelType () const override
	Return a unique id for this model (SACMODEL_ELLIPSE3D). More...

Public Member Functions inherited from pcl::SampleConsensusModel< PointT >
	SampleConsensusModel (const PointCloudConstPtr &cloud, bool random=false)
	Constructor for base SampleConsensusModel. More...

	SampleConsensusModel (const PointCloudConstPtr &cloud, const Indices &indices, bool random=false)
	Constructor for base SampleConsensusModel. More...

virtual	~SampleConsensusModel ()=default
	Destructor for base SampleConsensusModel. More...

virtual void	getSamples (int &iterations, Indices &samples)
	Get a set of random data samples and return them as point indices. More...

virtual void	setInputCloud (const PointCloudConstPtr &cloud)
	Provide a pointer to the input dataset. More...

PointCloudConstPtr	getInputCloud () const
	Get a pointer to the input point cloud dataset. More...

void	setIndices (const IndicesPtr &indices)
	Provide a pointer to the vector of indices that represents the input data. More...

void	setIndices (const Indices &indices)
	Provide the vector of indices that represents the input data. More...

IndicesPtr	getIndices () const
	Get a pointer to the vector of indices used. More...

const std::string &	getClassName () const
	Get a string representation of the name of this class. More...

unsigned int	getSampleSize () const
	Return the size of a sample from which the model is computed. More...

unsigned int	getModelSize () const
	Return the number of coefficients in the model. More...

void	setRadiusLimits (const double &min_radius, const double &max_radius)
	Set the minimum and maximum allowable radius limits for the model (applicable to models that estimate a radius) More...

void	getRadiusLimits (double &min_radius, double &max_radius) const
	Get the minimum and maximum allowable radius limits for the model as set by the user. More...

void	setModelConstraints (std::function< bool(const Eigen::VectorXf &)> function)
	This can be used to impose any kind of constraint on the model, e.g. More...

void	setSamplesMaxDist (const double &radius, SearchPtr search)
	Set the maximum distance allowed when drawing random samples. More...

void	getSamplesMaxDist (double &radius) const
	Get maximum distance allowed when drawing random samples. More...

double	computeVariance (const std::vector< double > &error_sqr_dists) const
	Compute the variance of the errors to the model. More...

double	computeVariance () const
	Compute the variance of the errors to the model from the internally estimated vector of distances. More...

Protected Member Functions
bool	isModelValid (const Eigen::VectorXf &model_coefficients) const override
	Check whether a model is valid given the user constraints. More...

bool	isSampleGood (const Indices &samples) const override
	Check if a sample of indices results in a good sample of points indices. More...

Protected Member Functions inherited from pcl::SampleConsensusModel< PointT >
	SampleConsensusModel (bool random=false)
	Empty constructor for base SampleConsensusModel. More...

void	drawIndexSample (Indices &sample)
	Fills a sample array with random samples from the indices_ vector. More...

void	drawIndexSampleRadius (Indices &sample)
	Fills a sample array with one random sample from the indices_ vector and other random samples that are closer than samples_radius_. More...

int	rnd ()
	Boost-based random number generator. More...

Additional Inherited Members
Protected Attributes inherited from pcl::SampleConsensusModel< PointT >
std::string	model_name_
	The model name. More...

PointCloudConstPtr	input_
	A boost shared pointer to the point cloud data array. More...

IndicesPtr	indices_
	A pointer to the vector of point indices to use. More...

double	radius_min_
	The minimum and maximum radius limits for the model. More...

double	radius_max_

double	samples_radius_
	The maximum distance of subsequent samples from the first (radius search) More...

SearchPtr	samples_radius_search_
	The search object for picking subsequent samples using radius search. More...

Indices	shuffled_indices_
	Data containing a shuffled version of the indices. More...

boost::mt19937	rng_alg_
	Boost-based random number generator algorithm. More...

std::shared_ptr< boost::uniform_int<> >	rng_dist_
	Boost-based random number generator distribution. More...

std::shared_ptr< boost::variate_generator< boost::mt19937 &, boost::uniform_int<> > >	rng_gen_
	Boost-based random number generator. More...

std::vector< double >	error_sqr_dists_
	A vector holding the distances to the computed model. More...

unsigned int	sample_size_
	The size of a sample from which the model is computed. More...

unsigned int	model_size_
	The number of coefficients in the model. More...

std::function< bool(const Eigen::VectorXf &)>	custom_model_constraints_
	A user defined function that takes model coefficients and returns whether the model is acceptable or not. More...

Static Protected Attributes inherited from pcl::SampleConsensusModel< PointT >
static const unsigned int	max_sample_checks_ = 1000
	The maximum number of samples to try until we get a good one. More...

Detailed Description

template<typename PointT>
class pcl::SampleConsensusModelEllipse3D< PointT >

SampleConsensusModelEllipse3D defines a model for 3D ellipse segmentation.

The model coefficients are defined as:

center.x : the X coordinate of the ellipse's center
center.y : the Y coordinate of the ellipse's center
center.z : the Z coordinate of the ellipse's center
semi_axis.u : semi-major axis length along the local u-axis of the ellipse
semi_axis.v : semi-minor axis length along the local v-axis of the ellipse
normal.x : the X coordinate of the normal's direction
normal.y : the Y coordinate of the normal's direction
normal.z : the Z coordinate of the normal's direction
u.x : the X coordinate of the local u-axis of the ellipse
u.y : the Y coordinate of the local u-axis of the ellipse
u.z : the Z coordinate of the local u-axis of the ellipse

For more details please refer to the following manuscript: "Semi-autonomous Prosthesis Control Using Minimal Depth Information and Vibrotactile Feedback", Miguel N. Castro & Strahinja Dosen. IEEE Transactions on Human-Machine Systems [under review]. arXiv:2210.00541. (@ github.com/mnobrecastro/pcl-ellipse-fitting)

Author: Miguel Nobre Castro (mnobr.nosp@m.ecas.nosp@m.tro@g.nosp@m.mail.nosp@m..com)

Definition at line 41 of file sac_model_ellipse3d.h.

Member Typedef Documentation

◆ ConstPtr

template<typename PointT >

using pcl::SampleConsensusModelEllipse3D< PointT >::ConstPtr = shared_ptr<const SampleConsensusModelEllipse3D<PointT> >

Definition at line 56 of file sac_model_ellipse3d.h.

◆ PointCloud

template<typename PointT >

using pcl::SampleConsensusModelEllipse3D< PointT >::PointCloud = typename SampleConsensusModel<PointT>::PointCloud

Definition at line 51 of file sac_model_ellipse3d.h.

◆ PointCloudConstPtr

template<typename PointT >

using pcl::SampleConsensusModelEllipse3D< PointT >::PointCloudConstPtr = typename SampleConsensusModel<PointT>::PointCloudConstPtr

Definition at line 53 of file sac_model_ellipse3d.h.

◆ PointCloudPtr

template<typename PointT >

using pcl::SampleConsensusModelEllipse3D< PointT >::PointCloudPtr = typename SampleConsensusModel<PointT>::PointCloudPtr

Definition at line 52 of file sac_model_ellipse3d.h.

◆ Ptr

template<typename PointT >

using pcl::SampleConsensusModelEllipse3D< PointT >::Ptr = shared_ptr<SampleConsensusModelEllipse3D<PointT> >

Definition at line 55 of file sac_model_ellipse3d.h.

Constructor & Destructor Documentation

◆ SampleConsensusModelEllipse3D() [1/3]

template<typename PointT >

pcl::SampleConsensusModelEllipse3D< PointT >::SampleConsensusModelEllipse3D	(	const PointCloudConstPtr &	cloud,
		bool	random = `false`
	)

inline

Constructor for base SampleConsensusModelEllipse3D.

Parameters

[in]	cloud	the input point cloud dataset
[in]	random	if true set the random seed to the current time, else set to 12345 (default: false)

Definition at line 62 of file sac_model_ellipse3d.h.

References pcl::SampleConsensusModel< PointT >::model_name_, pcl::SampleConsensusModel< PointT >::model_size_, and pcl::SampleConsensusModel< PointT >::sample_size_.

◆ SampleConsensusModelEllipse3D() [2/3]

template<typename PointT >

pcl::SampleConsensusModelEllipse3D< PointT >::SampleConsensusModelEllipse3D	(	const PointCloudConstPtr &	cloud,
		const Indices &	indices,
		bool	random = `false`
	)

inline

Constructor for base SampleConsensusModelEllipse3D.

Parameters

[in]	cloud	the input point cloud dataset
[in]	indices	a vector of point indices to be used from cloud
[in]	random	if true set the random seed to the current time, else set to 12345 (default: false)

Definition at line 75 of file sac_model_ellipse3d.h.

References pcl::SampleConsensusModel< PointT >::model_name_, pcl::SampleConsensusModel< PointT >::model_size_, and pcl::SampleConsensusModel< PointT >::sample_size_.

◆ ~SampleConsensusModelEllipse3D()

template<typename PointT >

pcl::SampleConsensusModelEllipse3D< PointT >::~SampleConsensusModelEllipse3D ( )

overridedefault

Empty destructor.

◆ SampleConsensusModelEllipse3D() [3/3]

template<typename PointT >

pcl::SampleConsensusModelEllipse3D< PointT >::SampleConsensusModelEllipse3D ( const SampleConsensusModelEllipse3D< PointT > & source )

inline

Copy constructor.

Parameters

[in] source the model to copy into this

Definition at line 91 of file sac_model_ellipse3d.h.

References pcl::SampleConsensusModel< PointT >::model_name_.

Member Function Documentation

◆ computeModelCoefficients()

template<typename PointT >

bool pcl::SampleConsensusModelEllipse3D< PointT >::computeModelCoefficients	(	const Indices &	samples,
		Eigen::VectorXf &	model_coefficients
	)		const

overridevirtual

Check whether the given index samples can form a valid 3D ellipse model, compute the model coefficients from these samples and store them in model_coefficients.

The ellipse coefficients are: x, y, R.

Parameters

[in]	samples	the point indices found as possible good candidates for creating a valid model
[out]	model_coefficients	the resultant model coefficients

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 52 of file sac_model_ellipse3d.hpp.

◆ countWithinDistance()

template<typename PointT >

std::size_t pcl::SampleConsensusModelEllipse3D< PointT >::countWithinDistance	(	const Eigen::VectorXf &	model_coefficients,
		const double	threshold
	)		const

overridevirtual

Count all the points which respect the given model coefficients as inliers.

Parameters

[in]	model_coefficients	the coefficients of a model that we need to compute distances to
[in]	threshold	maximum admissible distance threshold for determining the inliers from the outliers

Returns: the resultant number of inliers

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 375 of file sac_model_ellipse3d.hpp.

◆ doSamplesVerifyModel()

template<typename PointT >

bool pcl::SampleConsensusModelEllipse3D< PointT >::doSamplesVerifyModel	(	const std::set< index_t > &	indices,
		const Eigen::VectorXf &	model_coefficients,
		const double	threshold
	)		const

overridevirtual

Verify whether a subset of indices verifies the given 3d ellipse model coefficients.

Parameters

[in]	indices	the data indices that need to be tested against the 3d ellipse model
[in]	model_coefficients	the 3d ellipse model coefficients
[in]	threshold	a maximum admissible distance threshold for determining the inliers from the outliers

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 636 of file sac_model_ellipse3d.hpp.

◆ getDistancesToModel()

template<typename PointT >

void pcl::SampleConsensusModelEllipse3D< PointT >::getDistancesToModel	(	const Eigen::VectorXf &	model_coefficients,
		std::vector< double > &	distances
	)		const

overridevirtual

Compute all distances from the cloud data to a given 3D ellipse model.

Parameters

[in]	model_coefficients	the coefficients of a 3D ellipse model that we need to compute distances to
[out]	distances	the resultant estimated distances

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 248 of file sac_model_ellipse3d.hpp.

◆ getModelType()

template<typename PointT >

pcl::SacModel pcl::SampleConsensusModelEllipse3D< PointT >::getModelType ( ) const

inlineoverridevirtual

Return a unique id for this model (SACMODEL_ELLIPSE3D).

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 180 of file sac_model_ellipse3d.h.

References pcl::SACMODEL_ELLIPSE3D.

◆ isModelValid()

template<typename PointT >

bool pcl::SampleConsensusModelEllipse3D< PointT >::isModelValid ( const Eigen::VectorXf & model_coefficients ) const

overrideprotectedvirtual

Check whether a model is valid given the user constraints.

Parameters

[in] model_coefficients the set of model coefficients

Reimplemented from pcl::SampleConsensusModel< PointT >.

Definition at line 694 of file sac_model_ellipse3d.hpp.

◆ isSampleGood()

template<typename PointT >

bool pcl::SampleConsensusModelEllipse3D< PointT >::isSampleGood ( const Indices & samples ) const

overrideprotectedvirtual

Check if a sample of indices results in a good sample of points indices.

Parameters

[in] samples the resultant index samples

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 24 of file sac_model_ellipse3d.hpp.

◆ operator=()

template<typename PointT >

SampleConsensusModelEllipse3D& pcl::SampleConsensusModelEllipse3D< PointT >::operator= ( const SampleConsensusModelEllipse3D< PointT > & source )

inline

Copy constructor.

Parameters

[in] source the model to copy into this

Definition at line 102 of file sac_model_ellipse3d.h.

◆ optimizeModelCoefficients()

template<typename PointT >

void pcl::SampleConsensusModelEllipse3D< PointT >::optimizeModelCoefficients	(	const Indices &	inliers,
		const Eigen::VectorXf &	model_coefficients,
		Eigen::VectorXf &	optimized_coefficients
	)		const

overridevirtual

Recompute the 3d ellipse coefficients using the given inlier set and return them to the user.

Note: : these are the coefficients of the 3d ellipse model after refinement (e.g. after SVD)

Parameters

[in]	inliers	the data inliers found as supporting the model
[in]	model_coefficients	the initial guess for the optimization
[out]	optimized_coefficients	the resultant recomputed coefficients after non-linear optimization

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 430 of file sac_model_ellipse3d.hpp.

◆ projectPoints()

template<typename PointT >

void pcl::SampleConsensusModelEllipse3D< PointT >::projectPoints	(	const Indices &	inliers,
		const Eigen::VectorXf &	model_coefficients,
		PointCloud &	projected_points,
		bool	copy_data_fields = `true`
	)		const

overridevirtual

Create a new point cloud with inliers projected onto the 3d ellipse model.

Parameters

[in]	inliers	the data inliers that we want to project on the 3d ellipse model
[in]	model_coefficients	the coefficients of a 3d ellipse model
[out]	projected_points	the resultant projected points
[in]	copy_data_fields	set to true if we need to copy the other data fields

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 490 of file sac_model_ellipse3d.hpp.

References pcl::PointCloud< PointT >::header, pcl::PointCloud< PointT >::height, pcl::PointCloud< PointT >::is_dense, pcl::PointCloud< PointT >::resize(), pcl::PointCloud< PointT >::size(), and pcl::PointCloud< PointT >::width.

◆ selectWithinDistance()

template<typename PointT >

void pcl::SampleConsensusModelEllipse3D< PointT >::selectWithinDistance	(	const Eigen::VectorXf &	model_coefficients,
		const double	threshold,
		Indices &	inliers
	)

overridevirtual

Compute all distances from the cloud data to a given 3D ellipse model.

Parameters

[in]	model_coefficients	the coefficients of a 3D ellipse model that we need to compute distances to
[in]	threshold	a maximum admissible distance threshold for determining the inliers from the outliers
[out]	inliers	the resultant model inliers

Implements pcl::SampleConsensusModel< PointT >.

Definition at line 310 of file sac_model_ellipse3d.hpp.

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

pcl/sample_consensus/sac_model_ellipse3d.h
pcl/sample_consensus/impl/sac_model_ellipse3d.hpp

Public Types

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

template<typename PointT> class pcl::SampleConsensusModelEllipse3D< PointT >

Member Typedef Documentation

◆ ConstPtr

◆ PointCloud

◆ PointCloudConstPtr

◆ PointCloudPtr

◆ Ptr

Constructor & Destructor Documentation

◆ SampleConsensusModelEllipse3D() [1/3]

◆ SampleConsensusModelEllipse3D() [2/3]

◆ ~SampleConsensusModelEllipse3D()

◆ SampleConsensusModelEllipse3D() [3/3]

Member Function Documentation

◆ computeModelCoefficients()

◆ countWithinDistance()

◆ doSamplesVerifyModel()

◆ getDistancesToModel()

◆ getModelType()

◆ isModelValid()

◆ isSampleGood()

◆ operator=()

◆ optimizeModelCoefficients()

◆ projectPoints()

◆ selectWithinDistance()

template<typename PointT>
class pcl::SampleConsensusModelEllipse3D< PointT >