/*this creates a yaml or xml list of files from the command line args */#include "opencv2/core/core.hpp"#include "opencv2/imgcodecs.hpp"#include "opencv2/highgui/highgui.hpp"#include <string>#include <iostream>using std::string;using std::cout;using std::endl;using namespace cv;static void help(char** av){    cout << "\nThis creates a yaml or xml list of files from the command line args\n"            "usage:\n./" << av[0] << " imagelist.yaml *.png\n"         << "Try using different extensions.(e.g. yaml yml xml xml.gz etc...)\n"         << "This will serialize this list of images or whatever with opencv‘s FileStorage framework" << endl;}int main(int ac, char** av){    cv::CommandLineParser parser(ac, av, "{help h||}{@output||}");    if (parser.has("help"))    {        help(av);        return 0;    }    string outputname = parser.get<string>("@output");    cout << "{yaml} outputname = " << outputname << endl;    if (outputname.empty())    {        help(av);        return 1;    }    Mat m = imread(outputname); //check if the output is an image - prevent overwrites!    if(!m.empty()){        std::cerr << "fail! Please specify an output file, don‘t want to overwrite you images!" << endl;        help(av);        return 1;    }    //Jeff --> write into outputname.    FileStorage fs(outputname, FileStorage::WRITE);    fs << "images" << "[";    for(int i = 2; i < ac; i++){        //Jeff --> write by "<<", redirection to file stream.        fs << string(av[i]);    }    fs << "]";    return 0;}