Horizontal Grays S2

// Name        : OpenCVTest3.cpp

// Author      : jslee

// Version     :

// Copyright   : Your copyright notice

// Description : Hello World in C++, Ansi-style

//============================================================================

#include <iostream>

#include <stdio.h>

#include <sys/time.h>

#include "opencv2/opencv.hpp"

struct timeval start_time;

struct timeval end_time;

double elapsed_time;

float fps;

double total_fps = 0.0,average_fps = 0.0;

long cnt=1;

using namespace std;

int main() {

IplImage* img = 0;

int key;

CvCapture* capture = cvCaptureFromCAM(0);

cvSetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH, 640);

cvSetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT, 480);

cvSetCaptureProperty( capture, CV_CAP_PROP_FPS, 30);

while(1)

{

gettimeofday(&start_time,NULL);

cvGrabFrame(capture);

img = cvRetrieveFrame(capture);

cvNamedWindow( "PreviewImage", 1 );

cvShowImage( "PreviewImage", img );

key = cvWaitKey(1);

if(key > 10) break;

//end_time = clock();

gettimeofday(&end_time, NULL);

// elapsed_time = (double)(end_time-start_time) / CLOCKS_PER_SEC;

elapsed_time = (double)(end_time.tv_sec) + (double)(end_time.tv_usec)/1000000.0 - (double)(start_time.tv_sec) - (double)(start_time.tv_usec)/1000000.0;

fps = 1.0 / elapsed_time;

total_fps += fps;

average_fps = total_fps / (double)(cnt);

cnt++;

elapsed_time *= 1000.0;

printf("Elapsed Time = %2.3f ms, Frame Rate = %2.3f (fps), Average Frame Rate = %2.3f \n",elapsed_time,fps,average_fps);

} //end of while(1)

cvReleaseCapture( &capture );

//cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!

return 0;

}