OpenCV C++计时
getTickCount()返回操作系统启动到当前所经过的计时周期
getTickFrequency()返回每秒的计时周期(即Tick Per Second)
int64_t start = cv::getTickCount();
// type your code here
int64_t end = cv::getTickCount();
double runtime = double(end - start) / double(cv::getTickFrequency()); // 计时单位: μs
getTickCount()函数在core.hpp中定义,返回值类型为int64,占用8个字节。
代码中我们使用了int64_t数据类型,之前出现过这样的情况:计时结果为负,将int改为int64_t后解决了此问题
Python计时
import time
start_t = time.time()
# type your code here
print("Runtime: {} seconds".format(time.time() - start_t))