Tracker-by-Matching algorithm interface. More...

#include <opencv2/tracking/tracking_by_matching.hpp>

Public Types
using	Descriptor = std::shared_ptr< IImageDescriptor >

using	Distance = std::shared_ptr< IDescriptorDistance >

Public Member Functions
virtual	~ITrackerByMatching ()
	Destructor for the tracker. More...

virtual size_t	count () const =0
	Returns number of counted people. More...

virtual const Descriptor &	descriptorFast () const =0
	Fast descriptor getter. More...

virtual const Descriptor &	descriptorStrong () const =0
	Strong descriptor getter. More...

virtual const Distance &	distanceFast () const =0
	Fast distance getter. More...

virtual const Distance &	distanceStrong () const =0
	Strong distance getter. More...

virtual cv::Mat	drawActiveTracks (const cv::Mat &frame)=0
	Draws active tracks on a given frame. More...

virtual void	dropForgottenTrack (size_t track_id)=0
	dropForgottenTrack Check that the track was lost too many frames ago and removes it frm memory. More...

virtual void	dropForgottenTracks ()=0
	dropForgottenTracks Removes tracks from memory that were lost too many frames ago. More...

virtual std::unordered_map< size_t, std::vector< cv::Point > >	getActiveTracks () const =0
	Get active tracks to draw. More...

virtual bool	isTrackForgotten (size_t id) const =0
	isTrackForgotten returns true if track is forgotten. More...

virtual bool	isTrackValid (size_t track_id) const =0
	isTrackValid Checks whether track is valid (duration > threshold). More...

virtual const TrackerParams &	params () const =0
	Pipeline parameters getter. More...

virtual void	process (const cv::Mat &frame, const TrackedObjects &detections, uint64_t timestamp)=0
	Process given frame. More...

virtual void	setDescriptorFast (const Descriptor &val)=0
	Fast descriptor setter. More...

virtual void	setDescriptorStrong (const Descriptor &val)=0
	Strong descriptor setter. More...

virtual void	setDistanceFast (const Distance &val)=0
	Fast distance setter. More...

virtual void	setDistanceStrong (const Distance &val)=0
	Strong distance setter. More...

virtual void	setParams (const TrackerParams &params)=0
	Pipeline parameters setter. More...

virtual TrackedObjects	trackedDetections () const =0
	Get tracked detections. More...

virtual const std::unordered_map< size_t, Track > &	tracks () const =0
	tracks Returns all tracks including forgotten (lost too many frames ago). More...

Detailed Description

Tracker-by-Matching algorithm interface.

This class is implementation of tracking-by-matching system. It uses two different appearance measures to compute affinity between bounding boxes: some fast descriptor and some strong descriptor. Each time the assignment problem is solved. The assignment problem in our case is how to establish correspondence between existing tracklets and recently detected objects. First step is to compute an affinity matrix between tracklets and detections. The affinity equals to appearance_affinity * motion_affinity * shape_affinity. Where appearance is 1 - distance(tracklet_fast_dscr, detection_fast_dscr). Second step is to solve the assignment problem using Kuhn-Munkres algorithm. If correspondence between some tracklet and detection is established with low confidence (affinity) then the strong descriptor is used to determine if there is correspondence between tracklet and detection.

Member Typedef Documentation

◆ Descriptor

using cv::detail::tracking::tbm::ITrackerByMatching::Descriptor = std::shared_ptr<IImageDescriptor>

◆ Distance

using cv::detail::tracking::tbm::ITrackerByMatching::Distance = std::shared_ptr<IDescriptorDistance>

Constructor & Destructor Documentation

◆ ~ITrackerByMatching()

virtual cv::detail::tracking::tbm::ITrackerByMatching::~ITrackerByMatching ( )

inlinevirtual

Destructor for the tracker.

Member Function Documentation

◆ count()

virtual size_t cv::detail::tracking::tbm::ITrackerByMatching::count ( ) const

pure virtual

Returns number of counted people.

Returns: a number of counted people.

◆ descriptorFast()

virtual const Descriptor& cv::detail::tracking::tbm::ITrackerByMatching::descriptorFast ( ) const

pure virtual

Fast descriptor getter.

Returns: Fast descriptor used in pipeline.

◆ descriptorStrong()

virtual const Descriptor& cv::detail::tracking::tbm::ITrackerByMatching::descriptorStrong ( ) const

pure virtual

Strong descriptor getter.

Returns: Strong descriptor used in pipeline.

◆ distanceFast()

virtual const Distance& cv::detail::tracking::tbm::ITrackerByMatching::distanceFast ( ) const

pure virtual

Fast distance getter.

Returns: Fast distance used in pipeline.

◆ distanceStrong()

virtual const Distance& cv::detail::tracking::tbm::ITrackerByMatching::distanceStrong ( ) const

pure virtual

Strong distance getter.

Returns: Strong distance used in pipeline.

◆ drawActiveTracks()

virtual cv::Mat cv::detail::tracking::tbm::ITrackerByMatching::drawActiveTracks ( const cv::Mat & frame )

pure virtual

Draws active tracks on a given frame.

Parameters

[in] frame Colored image (CV_8UC3).

Returns: Colored image with drawn active tracks.

◆ dropForgottenTrack()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::dropForgottenTrack ( size_t track_id )

pure virtual

dropForgottenTrack Check that the track was lost too many frames ago and removes it frm memory.

◆ dropForgottenTracks()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::dropForgottenTracks ( )

pure virtual

dropForgottenTracks Removes tracks from memory that were lost too many frames ago.

◆ getActiveTracks()

virtual std::unordered_map<size_t, std::vector<cv::Point> > cv::detail::tracking::tbm::ITrackerByMatching::getActiveTracks ( ) const

pure virtual

Get active tracks to draw.

Returns: Active tracks.

◆ isTrackForgotten()

virtual bool cv::detail::tracking::tbm::ITrackerByMatching::isTrackForgotten ( size_t id ) const

pure virtual

isTrackForgotten returns true if track is forgotten.

Parameters

id Track ID.

Returns: true if track is forgotten.

◆ isTrackValid()

virtual bool cv::detail::tracking::tbm::ITrackerByMatching::isTrackValid ( size_t track_id ) const

pure virtual

isTrackValid Checks whether track is valid (duration > threshold).

Parameters

track_id Index of checked track.

Returns: True if track duration exceeds some predefined value.

◆ params()

virtual const TrackerParams& cv::detail::tracking::tbm::ITrackerByMatching::params ( ) const

pure virtual

Pipeline parameters getter.

Returns: Parameters of pipeline.

◆ process()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::process	(	const cv::Mat &	frame,
		const TrackedObjects &	detections,
		uint64_t	timestamp
	)

pure virtual

Process given frame.

Parameters

[in]	frame	Colored image (CV_8UC3).
[in]	detections	Detected objects on the frame.
[in]	timestamp	Timestamp must be positive and measured in milliseconds

◆ setDescriptorFast()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::setDescriptorFast ( const Descriptor & val )

pure virtual

Fast descriptor setter.

Parameters

[in] val Fast descriptor used in pipeline.

◆ setDescriptorStrong()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::setDescriptorStrong ( const Descriptor & val )

pure virtual

Strong descriptor setter.

Parameters

[in] val Strong descriptor used in pipeline.

◆ setDistanceFast()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::setDistanceFast ( const Distance & val )

pure virtual

Fast distance setter.

Parameters

[in] val Fast distance used in pipeline.

◆ setDistanceStrong()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::setDistanceStrong ( const Distance & val )

pure virtual

Strong distance setter.

Parameters

[in] val Strong distance used in pipeline.

◆ setParams()

virtual void cv::detail::tracking::tbm::ITrackerByMatching::setParams ( const TrackerParams & params )

pure virtual

Pipeline parameters setter.

Parameters

[in] params Parameters of pipeline.

◆ trackedDetections()

virtual TrackedObjects cv::detail::tracking::tbm::ITrackerByMatching::trackedDetections ( ) const

pure virtual

Get tracked detections.

Returns: Tracked detections.

◆ tracks()

virtual const std::unordered_map<size_t, Track>& cv::detail::tracking::tbm::ITrackerByMatching::tracks ( ) const

pure virtual

tracks Returns all tracks including forgotten (lost too many frames ago).

Returns: Set of tracks {id, track}.

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

opencv2/tracking/tracking_by_matching.hpp

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ Descriptor

◆ Distance

Constructor & Destructor Documentation

◆ ~ITrackerByMatching()

Member Function Documentation

◆ count()

◆ descriptorFast()

◆ descriptorStrong()

◆ distanceFast()

◆ distanceStrong()

◆ drawActiveTracks()

◆ dropForgottenTrack()

◆ dropForgottenTracks()

◆ getActiveTracks()

◆ isTrackForgotten()

◆ isTrackValid()

◆ params()

◆ process()

◆ setDescriptorFast()

◆ setDescriptorStrong()

◆ setDistanceFast()

◆ setDistanceStrong()

◆ setParams()

◆ trackedDetections()

◆ tracks()