/*
  Demo program to open and display an image file in OpenCV.
  J.K. Johnstone
 */

#include <cv.h>      // these two OpenCV libraries should be included 
#include <highgui.h> // in any OpenCV program
#include <iostream>
using namespace std;

int main (int argc, char **argv)
{
  if (argc != 2) 
    { cout << "Need an image parameter (jpg or ppm/pgm)" << endl; exit(-1); }
  IplImage *img = cvLoadImage (argv[1]);
  cvNamedWindow ("OpenCV demo", 1);
  cvShowImage   ("OpenCV demo", img); // 1st parameter is the window
  cvWaitKey (0);          // wait for a keystroke before releasing image/window
  cvDestroyWindow("foo"); // what is this parameter for?
  cvReleaseImage (&img);
  return 0;
}