OpenCV的TickMeter计时类

1. TickMeter是一个计时的类

https://docs.opencv.org/4.x/d9/d6f/classcv_1_1TickMeter.html#details

1.1 计算耗时

        TickMeter tm;
        tm.start();
        // do something ...
        tm.stop();
        cout << "Total time: " << tm.getTimeSec() << endl;

1.2 计算循环的平均耗时和FPS

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

1.3 function

index	function
1	getAvgTimeMilli
2	getAvgTimeSec
3	getCounter
4	getFPS
5	getTimeMicro
6	getTimeMilli
7	getTimeSec
8	getTimeTicks
9	reset
10	start
11	stop

2. 案例

import time

import cv2

tm = cv2.TickMeter()
index = 0
print(f"|index|function|")
print(