Example 3 for OpenCV Tutorial

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

int main(int argc, char *argv[])
{
    IplImage *img;
    img = cvLoadImage(argv[1], 0);
    cvSmooth(img, img, CV_GAUSSIAN, 7, 7, 0, 0);
    cvSaveImage("result.png", img);
    cvNamedWindow("Smoothing", 1);
    cvShowImage("Smoothing", img);
    cvWaitKey(-1); // wait forever for a key
    return 0;
}