cv::TickMeter Class Reference

a Class to measure passing time. More...

#include <opencv2/core/utility.hpp>

Public Member Functions
	TickMeter ()
	the default constructor More...
int64	getCounter () const
	returns internal counter value. More...
double	getTimeMicro () const
	returns passed time in microseconds. More...
double	getTimeMilli () const
	returns passed time in milliseconds. More...
double	getTimeSec () const
	returns passed time in seconds. More...
int64	getTimeTicks () const
	returns counted ticks. More...
void	reset ()
	resets internal values. More...
void	start ()
	starts counting ticks. More...
void	stop ()
	stops counting ticks. More...

Detailed Description

a Class to measure passing time.

The class computes passing time by counting the number of ticks per second. That is, the following code computes the execution time in seconds:

TickMeter tm;
tm.start();
// do something ...
tm.stop();
std::cout << tm.getTimeSec();

It is also possible to compute the average time over multiple runs:

TickMeter tm;
for (int i = 0; i < 100; i++)
{
    tm.start();
    // do something ...
    tm.stop();
}
double average_time = tm.getTimeSec() / tm.getCounter();
std::cout << "Average time in second per iteration is: " << average_time << std::endl;

See also

getTickCount, getTickFrequency

Examples:

samples/dnn/object_detection.cpp.

Constructor & Destructor Documentation

TickMeter()

cv::TickMeter::TickMeter ( )

inline

the default constructor

Member Function Documentation

getCounter()

int64 cv::TickMeter::getCounter ( ) const

inline

returns internal counter value.

getTimeMicro()

double cv::TickMeter::getTimeMicro ( ) const

inline

returns passed time in microseconds.

getTimeMilli()

double cv::TickMeter::getTimeMilli ( ) const

inline

returns passed time in milliseconds.

getTimeSec()

double cv::TickMeter::getTimeSec ( ) const

inline

returns passed time in seconds.

References cv::getTickFrequency().

Referenced by cv::operator<<().

Here is the call graph for this function:

Here is the caller graph for this function:

getTimeTicks()

int64 cv::TickMeter::getTimeTicks ( ) const

inline

returns counted ticks.

reset()

void cv::TickMeter::reset ( )

inline

resets internal values.

start()

void cv::TickMeter::start ( )

inline

starts counting ticks.

References cv::getTickCount().

Here is the call graph for this function:

stop()

void cv::TickMeter::stop ( )

inline

stops counting ticks.

References cv::getTickCount().

Here is the call graph for this function:

---

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

• opencv2/core/utility.hpp