1 int64 st1,et1; 2 st1 = cvGetTickCount(); 3 const char* imagename = "lenaBG.jpg"; 4 //从文件中读入图像 5 Mat img = imread(imagename); 6 et1 = cvGetTickCount(); 8 printf("cost: %f milliseconds\n\n", (et1-st1)/(double)cvGetTickFrequency()/1000.0);
原文：http://www.cnblogs.com/onwayo/p/3604890.html