PointCloudLibrary

HarrisKeypoint2D detects Harris corners family points. More...

#include <pcl/keypoints/harris_2d.h>

Public Types
enum	ResponseMethod { HARRIS = 1, NOBLE, LOWE, TOMASI }

using	Ptr = shared_ptr< HarrisKeypoint2D< PointInT, PointOutT, IntensityT > >

using	ConstPtr = shared_ptr< const HarrisKeypoint2D< PointInT, PointOutT, IntensityT > >

using	PointCloudIn = typename Keypoint< PointInT, PointOutT >::PointCloudIn

using	PointCloudOut = typename Keypoint< PointInT, PointOutT >::PointCloudOut

using	KdTree = typename Keypoint< PointInT, PointOutT >::KdTree

using	PointCloudInConstPtr = typename PointCloudIn::ConstPtr

Public Types inherited from pcl::Keypoint< PointInT, PointOutT >
using	Ptr = shared_ptr< Keypoint< PointInT, PointOutT > >

using	ConstPtr = shared_ptr< const Keypoint< PointInT, PointOutT > >

using	BaseClass = PCLBase< PointInT >

using	KdTree = pcl::search::Search< PointInT >

using	KdTreePtr = typename KdTree::Ptr

using	PointCloudIn = pcl::PointCloud< PointInT >

using	PointCloudInPtr = typename PointCloudIn::Ptr

using	PointCloudInConstPtr = typename PointCloudIn::ConstPtr

using	PointCloudOut = pcl::PointCloud< PointOutT >

using	SearchMethod = std::function< int(pcl::index_t, double, pcl::Indices &, std::vector< float > &)>

using	SearchMethodSurface = std::function< int(const PointCloudIn &cloud, pcl::index_t index, double, pcl::Indices &, std::vector< float > &)>

Public Member Functions
	HarrisKeypoint2D (ResponseMethod method=HARRIS, int window_width=3, int window_height=3, int min_distance=5, float threshold=0.0)
	Constructor. More...

void	setMethod (ResponseMethod type)
	set the method of the response to be calculated. More...

void	setWindowWidth (int window_width)
	Set window width. More...

void	setWindowHeight (int window_height)
	Set window height. More...

void	setSkippedPixels (int skipped_pixels)
	Set number of pixels to skip. More...

void	setMinimalDistance (int min_distance)
	Set minimal distance between candidate keypoints. More...

void	setThreshold (float threshold)
	set the threshold value for detecting corners. More...

void	setNonMaxSupression (bool=false)
	whether non maxima suppression should be applied or the response for each point should be returned More...

void	setRefine (bool do_refine)
	whether the detected key points should be refined or not. More...

void	setNumberOfThreads (unsigned int nr_threads=0)
	Initialize the scheduler and set the number of threads to use. More...

Public Member Functions inherited from pcl::Keypoint< PointInT, PointOutT >
	Keypoint ()

	Keypoint ()
	Empty constructor. More...

void	harrisCorner (PointInT &output, PointInT &input, const float sigma_d, const float sigma_i, const float alpha, const float thresh)

void	hessianBlob (PointInT &output, PointInT &input, const float sigma, bool SCALE)

void	hessianBlob (PointInT &output, PointInT &input, const float start_scale, const float scaling_factor, const int num_scales)

void	imageElementMultiply (PointInT &output, PointInT &input1, PointInT &input2)

	~Keypoint ()
	Empty destructor. More...

virtual void	setSearchSurface (const PointCloudInConstPtr &cloud)
	Provide a pointer to the input dataset that we need to estimate features at every point for. More...

PointCloudInConstPtr	getSearchSurface ()
	Get a pointer to the surface point cloud dataset. More...

void	setSearchMethod (const KdTreePtr &tree)
	Provide a pointer to the search object. More...

KdTreePtr	getSearchMethod ()
	Get a pointer to the search method used. More...

double	getSearchParameter ()
	Get the internal search parameter. More...

void	setKSearch (int k)
	Set the number of k nearest neighbors to use for the feature estimation. More...

int	getKSearch ()
	get the number of k nearest neighbors used for the feature estimation. More...

void	setRadiusSearch (double radius)
	Set the sphere radius that is to be used for determining the nearest neighbors used for the key point detection. More...

double	getRadiusSearch ()
	Get the sphere radius used for determining the neighbors. More...

pcl::PointIndicesConstPtr	getKeypointsIndices ()

void	compute (PointCloudOut &output)
	Base method for key point detection for all points given in <setInputCloud (), setIndices ()> using the surface in setSearchSurface () and the spatial locator in setSearchMethod () More...

int	searchForNeighbors (pcl::index_t index, double parameter, pcl::Indices &indices, std::vector< float > &distances) const
	Search for k-nearest neighbors using the spatial locator from setSearchmethod, and the given surface from setSearchSurface. More...

Protected Member Functions
bool	initCompute () override

void	detectKeypoints (PointCloudOut &output) override

void	responseHarris (PointCloudOut &output) const
	gets the corner response for valid input points More...

void	responseNoble (PointCloudOut &output) const

void	responseLowe (PointCloudOut &output) const

void	responseTomasi (PointCloudOut &output) const

void	computeSecondMomentMatrix (std::size_t pos, float *coefficients) const
	calculates the upper triangular part of unnormalized covariance matrix over intensities given by the 2D coordinates and window_width_ and window_height_ More...

Protected Member Functions inherited from pcl::Keypoint< PointInT, PointOutT >
const std::string &	getClassName () const
	Get a string representation of the name of this class. More...

virtual void	detectKeypoints (PointCloudOut &output)=0
	Abstract key point detection method. More...

Protected Attributes
float	threshold_
	threshold for non maxima suppression More...

bool	refine_
	corner refinement More...

bool	nonmax_
	non maximas suppression More...

ResponseMethod	method_
	cornerness computation method More...

unsigned int	threads_
	number of threads to be used More...

Protected Attributes inherited from pcl::Keypoint< PointInT, PointOutT >
std::string	name_
	The key point detection method's name. More...

SearchMethod	search_method_
	The search method template for indices. More...

SearchMethodSurface	search_method_surface_
	The search method template for points. More...

PointCloudInConstPtr	surface_
	An input point cloud describing the surface that is to be used for nearest neighbors estimation. More...

KdTreePtr	tree_
	A pointer to the spatial search object. More...

double	search_parameter_
	The actual search parameter (casted from either search_radius_ or k_). More...

double	search_radius_
	The nearest neighbors search radius for each point. More...

int	k_
	The number of K nearest neighbors to use for each point. More...

pcl::PointIndicesPtr	keypoints_indices_
	Indices of the keypoints in the input cloud. More...

Detailed Description

template<typename PointInT, typename PointOutT, typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>
class pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >

HarrisKeypoint2D detects Harris corners family points.

Author: Nizar Sallem

Definition at line 53 of file harris_2d.h.

Member Typedef Documentation

ConstPtr

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::ConstPtr = shared_ptr<const HarrisKeypoint2D<PointInT, PointOutT, IntensityT> >

Definition at line 57 of file harris_2d.h.

KdTree

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::KdTree = typename Keypoint<PointInT, PointOutT>::KdTree

Definition at line 61 of file harris_2d.h.

PointCloudIn

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::PointCloudIn = typename Keypoint<PointInT, PointOutT>::PointCloudIn

Definition at line 59 of file harris_2d.h.

PointCloudInConstPtr

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::PointCloudInConstPtr = typename PointCloudIn::ConstPtr

Definition at line 62 of file harris_2d.h.

PointCloudOut

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::PointCloudOut = typename Keypoint<PointInT, PointOutT>::PointCloudOut

Definition at line 60 of file harris_2d.h.

Ptr

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

using pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::Ptr = shared_ptr<HarrisKeypoint2D<PointInT, PointOutT, IntensityT> >

Definition at line 56 of file harris_2d.h.

Member Enumeration Documentation

ResponseMethod

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

enum pcl::HarrisKeypoint2D::ResponseMethod

Enumerator
HARRIS
NOBLE
LOWE
TOMASI

Definition at line 69 of file harris_2d.h.

Constructor & Destructor Documentation

HarrisKeypoint2D()

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::HarrisKeypoint2D	(	ResponseMethod	method = `HARRIS`,
		int	window_width = `3`,
		int	window_height = `3`,
		int	min_distance = `5`,
		float	threshold = `0.0`
	)

inline

Constructor.

Parameters

[in]	method	the method to be used to determine the corner responses
	window_width
	window_height
	min_distance
[in]	threshold	the threshold to filter out weak corners

Definition at line 78 of file harris_2d.h.

References pcl::Keypoint< PointInT, PointOutT >::name_.

Member Function Documentation

computeSecondMomentMatrix()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::computeSecondMomentMatrix	(	std::size_t	pos,
		float *	coefficients
	)		const

protected

calculates the upper triangular part of unnormalized covariance matrix over intensities given by the 2D coordinates and window_width_ and window_height_

Definition at line 106 of file harris_2d.hpp.

detectKeypoints()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::detectKeypoints ( PointCloudOut & output )

overrideprotected

!! nsallem 20120220 : we don't test here for density so if one term is nan the result is nan

Definition at line 178 of file harris_2d.hpp.

References pcl::isXYZFinite().

initCompute()

template<typename PointInT , typename PointOutT , typename IntensityT >

bool pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::initCompute

overrideprotectedvirtual

Reimplemented from pcl::Keypoint< PointInT, PointOutT >.

Definition at line 132 of file harris_2d.hpp.

responseHarris()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::responseHarris ( PointCloudOut & output ) const

protected

gets the corner response for valid input points

Definition at line 305 of file harris_2d.hpp.

References pcl::isXYZFinite().

responseLowe()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::responseLowe ( PointCloudOut & output ) const

protected

Definition at line 397 of file harris_2d.hpp.

References pcl::isXYZFinite().

responseNoble()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::responseNoble ( PointCloudOut & output ) const

protected

Definition at line 351 of file harris_2d.hpp.

References pcl::isXYZFinite().

responseTomasi()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::responseTomasi ( PointCloudOut & output ) const

protected

Definition at line 443 of file harris_2d.hpp.

References pcl::isXYZFinite().

setMethod()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setMethod ( ResponseMethod type )

set the method of the response to be calculated.

Parameters

[in] type

Definition at line 50 of file harris_2d.hpp.

setMinimalDistance()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setMinimalDistance ( int min_distance )

Set minimal distance between candidate keypoints.

Definition at line 99 of file harris_2d.hpp.

setNonMaxSupression()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setNonMaxSupression ( bool nonmax = false )

whether non maxima suppression should be applied or the response for each point should be returned

Note: this value needs to be turned on in order to apply thresholding and refinement

Parameters

[in] nonmax default is false

Definition at line 71 of file harris_2d.hpp.

setNumberOfThreads()

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setNumberOfThreads ( unsigned int nr_threads = 0 )

inline

Initialize the scheduler and set the number of threads to use.

Parameters

nr_threads the number of hardware threads to use (0 sets the value back to automatic)

Definition at line 133 of file harris_2d.h.

References pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::threads_.

setRefine()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setRefine ( bool do_refine )

whether the detected key points should be refined or not.

If turned of, the key points are a subset of the original point cloud. Otherwise the key points may be arbitrary.

note non maxima supression needs to be on in order to use this feature.

Parameters

[in] do_refine

Definition at line 64 of file harris_2d.hpp.

setSkippedPixels()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setSkippedPixels ( int skipped_pixels )

Set number of pixels to skip.

Definition at line 92 of file harris_2d.hpp.

setThreshold()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setThreshold ( float threshold )

set the threshold value for detecting corners.

This is only evaluated if non maxima suppression is turned on.

note non maxima suppression needs to be activated in order to use this feature.

Parameters

[in] threshold

Definition at line 57 of file harris_2d.hpp.

setWindowHeight()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setWindowHeight ( int window_height )

Set window height.

Definition at line 85 of file harris_2d.hpp.

setWindowWidth()

template<typename PointInT , typename PointOutT , typename IntensityT >

void pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setWindowWidth ( int window_width )

Set window width.

Definition at line 78 of file harris_2d.hpp.

Member Data Documentation

method_

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

ResponseMethod pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::method_

protected

cornerness computation method

Definition at line 163 of file harris_2d.h.

nonmax_

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

bool pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::nonmax_

protected

non maximas suppression

Definition at line 161 of file harris_2d.h.

refine_

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

bool pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::refine_

protected

corner refinement

Definition at line 159 of file harris_2d.h.

threads_

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

unsigned int pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::threads_

protected

number of threads to be used

Definition at line 165 of file harris_2d.h.

Referenced by pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::setNumberOfThreads().

threshold_

template<typename PointInT , typename PointOutT , typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>

float pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >::threshold_

protected

threshold for non maxima suppression

Definition at line 157 of file harris_2d.h.

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

pcl/keypoints/harris_2d.h
pcl/keypoints/impl/harris_2d.hpp

© 2009–2012, Willow Garage, Inc.
© 2012–, Open Perception, Inc.
Licensed under the BSD License.
https://pointclouds.org/documentation/classpcl_1_1_harris_keypoint2_d.html

Name	PointCloudLibrary
Version
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Last Updated	2021-12-29T19:25:09Z

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<typename PointInT, typename PointOutT, typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>> class pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >

Member Typedef Documentation

ConstPtr

KdTree

PointCloudIn

PointCloudInConstPtr

PointCloudOut

Ptr

Member Enumeration Documentation

ResponseMethod

Constructor & Destructor Documentation

HarrisKeypoint2D()

Member Function Documentation

computeSecondMomentMatrix()

detectKeypoints()

initCompute()

responseHarris()

responseLowe()

responseNoble()

responseTomasi()

setMethod()

setMinimalDistance()

setNonMaxSupression()

setNumberOfThreads()

setRefine()

setSkippedPixels()

setThreshold()

setWindowHeight()

setWindowWidth()

Member Data Documentation

method_

nonmax_

refine_

threads_

threshold_

template<typename PointInT, typename PointOutT, typename IntensityT = pcl::common::IntensityFieldAccessor<PointInT>>
class pcl::HarrisKeypoint2D< PointInT, PointOutT, IntensityT >