Capture Image to Disk

grab.cpp

#include <cstdio>
#include <ctime>
#include "cv.h"
#include "highgui.h"

int main(int argc, char** argv) {
	
	// open camera
	cv::VideoCapture cap(0);
	if(!cap.isOpened())
		return -1;

	// capture frame (captures 15 frames to settle)
	cv::Mat frame;
	for(int i=0; i<15; i++)
		cap >> frame;

	// write to disk with timestamp name
	time_t t = time(NULL); 
	char * tstamp = ctime(&t); 
	tstamp[strlen(tstamp)-1] = '\0'; 
	char filename[128];
	sprintf(filename, "%s.jpg", tstamp);
	imwrite(filename, frame);

	return 0;	
}