cvSet2D_benchmark.cpp

#include <stdio.h>
#include <time.h>

#include <cv.h>
#include <highgui.h>

int main()
{
	IplImage *img = cvCreateImage(cvSize(5000, 5000), IPL_DEPTH_8U, 1);
	cvZero(img);

	clock_t begin, end;
	int time1, time2;

	begin = clock();
	for (int i = 0; i < 5000; i++)
	{
		for (int j = 0; j < 5000; j++)
		{
			*(uchar *)(img->imageData + (i)* img->widthStep + (j)* img->nChannels) = 100;
		}
	}
	end = clock();
	time1 = end - begin;

	CvScalar in;
	in.val[0] = 100;
	begin = clock();
	for (int i = 0; i < 5000; i++)
	{
		for (int j = 0; j < 5000; j++)
		{
			cvSet2D(img, i, j, in);
		}
	}
	end = clock();
	time2 = end - begin;

	printf("Time 1: %d clocks\n", time1);
	printf("Time 2: %d clocks \n", time2);

	cvReleaseImage(&img);
	return 0;
}