cv::TickMeter Class Reference

a Class to measure passing time. More...

#include <opencv2/core/utility.hpp>

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

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();
        cout << "Total time: " << tm.getTimeSec() << endl;

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

        TickMeter tm;
        for (int i = 0; i < COUNT; i++)
        {
            tm.start();
            // do something ...
            tm.stop();
        }
        cout << "Average time per iteration in seconds: " << tm.getAvgTimeSec() << endl;
        cout << "Average FPS: " << tm.getFPS() << endl;

See also

getTickCount, getTickFrequency

Examples

samples/dnn/classification.cpp, and samples/dnn/object_detection.cpp.

Constructor & Destructor Documentation

TickMeter()

cv::TickMeter::TickMeter ( )

inline

the default constructor

Member Function Documentation

getAvgTimeMilli()

double cv::TickMeter::getAvgTimeMilli ( ) const

inline

returns average time in milliseconds

getAvgTimeSec()

double cv::TickMeter::getAvgTimeSec ( ) const

inline

returns average time in seconds

getCounter()

int64 cv::TickMeter::getCounter ( ) const

inline

returns internal counter value.

getFPS()

double cv::TickMeter::getFPS ( ) const

inline

returns average FPS (frames per second) 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.

Examples

samples/dnn/classification.cpp.

getTimeSec()

double cv::TickMeter::getTimeSec ( ) const

inline

returns passed time in seconds.

getTimeTicks()

int64 cv::TickMeter::getTimeTicks ( ) const

inline

returns counted ticks.

reset()

void cv::TickMeter::reset ( )

inline

resets internal values.

Examples

samples/dnn/classification.cpp.

start()

void cv::TickMeter::start ( )

inline

starts counting ticks.

Examples

samples/dnn/classification.cpp.

stop()

void cv::TickMeter::stop ( )

inline

stops counting ticks.

Examples

samples/dnn/classification.cpp.

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

• opencv2/core/utility.hpp