Background activity filter for event noise removal. More...

#include <filtering.hpp>

Public Member Functions
	BackgroundActivityFilter (const cv::Size &size, ev::TimeType dt, int radius=1)
	BackgroundActivityFilter (const BackgroundActivityFilter &)=default
	BackgroundActivityFilter (BackgroundActivityFilter &&) noexcept=default
BackgroundActivityFilter &	operator= (const BackgroundActivityFilter &)=default
BackgroundActivityFilter &	operator= (BackgroundActivityFilter &&) noexcept=default
bool	operator() (const ev::Event &e)

Detailed Description

Background activity filter for event noise removal.

Discards isolated events that have no correlated neighbor within a spatial radius and time window. An event passes if at least one pixel in its neighborhood fired within the last dt time units.

Note: T. Delbruck, "Frame-free dynamic digital vision"

Constructor & Destructor Documentation

◆ BackgroundActivityFilter()

ev::BackgroundActivityFilter::BackgroundActivityFilter	(	const cv::Size &	size,
		ev::TimeType	dt,
		int	radius = 1 )

Constructor.

Parameters

size	Sensor resolution (width × height)
dt	Time threshold; events with no neighbor firing within this window are discarded
radius	Spatial neighborhood half-size (default 1 → 3×3 / 8-connected)

Member Function Documentation

◆ operator()()

bool ev::BackgroundActivityFilter::operator() ( const ev::Event & e )

nodiscard

Test and record a single event.