在处理图像数据时,常常须要测算性能数据,其中计算耗时是一个关键指标。此处,介绍如何利用opencv来进行计时。具体见代码注释ios
#include<opencv2/core/core.hpp> #include<opencv2/highgui/highgui.hpp> #include<opencv2/imgproc/imgproc.hpp> #include<iostream> using namespace std; using namespace cv; int main() { //getTickCount获取CPU自某个事件以来走过的时钟周期数,例如开机 double start = static_cast<double>(getTickCount()); for (int i = 0; i < 1e9; i++) for (int j = 0; j < 1e9; j++); double end = static_cast<double>(getTickCount()); // getTickFrequency 获取CPU一秒钟走过的时钟周期数 double run_time = (end - start) / getTickFrequency(); cout << "run_time=" << run_time << " seconds" << endl; system("Pause"); }
结果以下:性能