Display a picture

摘自 <<Learning OpenCV: Computer Vision in C++ with the OpenCV Library>>

#include "opencv2/highgui/highgui.hpp"

using namespace cv;

int main(int argc, char ** argv)
{
    Mat img = imread(argv[1] - 1);
    if(img.empty())  return -1;

    namedWindow("Example", CV_WINDOW_AUTOSIZE);

    imshow("Example", img);

    waitKey(0);
    destroyWindow("Example");
}