ev::StatsContainer_< T > Class Template Reference

This class keeps the ingredients of the statistics of Stats_ up to date without storing the events. More...

#include <stats_container.hpp>

Inheritance diagram for ev::StatsContainer_< T >:

Public Types
using	value_type = Event_<T>
Public Types inherited from ev::Stats_< StatsContainer_< T > >
using	ResultType

Public Member Functions
void	push (const Event_< T > &e)
	Account for an event.
std::size_t	size () const
	Number of events accounted for.
bool	empty () const
	Check whether no event was accounted for.
TimeType	firstTimestamp () const
TimeType	lastTimestamp () const
cv::Point2d	sum () const
double	sumT () const
double	sumP () const
cv::Vec3d	squares () const
cv::Rect	bounds () const
std::size_t	activeCount () const
std::size_t	peakCount () const
double	sumCLogC () const
void	clear ()
	Forget every event. The per-pixel count keeps its extent, so accounting for a similar stream again does not grow it.
Public Member Functions inherited from ev::Stats_< StatsContainer_< T > >
ResultType	duration () const
	Time difference between the last and the first event.
ResultType	rate () const
	Compute event rate as the ratio between the number of events and the time difference between the last and the first event.
ResultType	density (const cv::Size size) const
	Compute event density as the ratio between the number of events and the number of pixels.
std::size_t	activePixels () const
	Count the pixels with at least one event.
ResultType	fillRatio (const cv::Size size) const
	Compute fill ratio as the fraction of pixels with at least one event.
ResultType	polarityRatio (const PolarityType p) const
	Compute polarity ratio as the fraction of events with the given polarity.
Event_< ResultType >	mean () const
	Compute the mean of the events.
cv::Point_< ResultType >	meanPoint () const
	Compute the mean x,y point of the events.
cv::Matx< ResultType, 2, 2 >	covariance () const
	Compute the covariance of the x,y coordinates of the events around meanPoint().
cv::Rect	boundingBox () const
	Compute the smallest rectangle of pixels containing the events.
ResultType	meanTime () const
	Compute the mean time of the events.
ResultType	midTime () const
	Calculate the midpoint time between the oldest and the newest event.
std::size_t	peak () const
	Find the largest number of events on a single pixel.
ResultType	entropy () const
	Compute the Shannon entropy of the spatial distribution of the events.

Detailed Description

template<typename T>
class ev::StatsContainer_< T >

This class keeps the ingredients of the statistics of Stats_ up to date without storing the events.

Analogously to OpenCV library, the following aliases are defined for convenience:

using StatsContaineri = StatsContainer_<int>;
using StatsContainerl = StatsContainer_<long>;
using StatsContainerf = StatsContainer_<float>;
using StatsContainerd = StatsContainer_<double>;
using StatsContainer  = StatsContaineri;

Member Function Documentation

activeCount()

template<typename T>

std::size_t ev::StatsContainer_< T >::activeCount ( ) const

inlinenodiscard

Number of pixels with events

bounds()

template<typename T>

cv::Rect ev::StatsContainer_< T >::bounds ( ) const

inlinenodiscard

Smallest rectangle of pixels holding the events

empty()

template<typename T>

bool ev::StatsContainer_< T >::empty ( ) const

inlinenodiscard

Check whether no event was accounted for.

Returns

True if empty

firstTimestamp()

template<typename T>

TimeType ev::StatsContainer_< T >::firstTimestamp ( ) const

inlinenodiscard

Timestamp of the first event

lastTimestamp()

template<typename T>

TimeType ev::StatsContainer_< T >::lastTimestamp ( ) const

inlinenodiscard

Timestamp of the last event

peakCount()

template<typename T>

std::size_t ev::StatsContainer_< T >::peakCount ( ) const

inlinenodiscard

Largest number of events on a pixel

push()

template<typename T>

void ev::StatsContainer_< T >::push ( const Event_< T > & e )

inline

Account for an event.

Parameters

e

Event

size()

template<typename T>

std::size_t ev::StatsContainer_< T >::size ( ) const

inlinenodiscard

Number of events accounted for.

Returns

Event count

squares()

template<typename T>

cv::Vec3d ev::StatsContainer_< T >::squares ( ) const

inlinenodiscard

Sums of x^2, y^2 and x*y

sum()

template<typename T>

cv::Point2d ev::StatsContainer_< T >::sum ( ) const

inlinenodiscard

Sum of x and y

sumCLogC()

template<typename T>

double ev::StatsContainer_< T >::sumCLogC ( ) const

inlinenodiscard

Sum of c*log2(c) over the pixel counts c

sumP()

template<typename T>

double ev::StatsContainer_< T >::sumP ( ) const

inlinenodiscard

Sum of p

sumT()

template<typename T>

double ev::StatsContainer_< T >::sumT ( ) const

inlinenodiscard

Sum of t

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

• modules/containers/include/openev/containers/stats_container.hpp