Program running time

Sleep should be used instead of wait(). Because wait takes too much CPU usage.


Measure Time in OpenCV

two simple functions to achieve this getTickCount() and getTickFrequency(). The first returns the number of ticks of your systems CPU from a certain event (like since you booted your system). The second returns how many times your CPU emits a tick during a second. So to measure in seconds the number of time elapsed between two operations is easy as:

double t = (double)getTickCount();
// do something ...
t = ((double)getTickCount() - t)/getTickFrequency();
cout << "Times passed in seconds: " << t << endl;