Save OpenCV mat as CSV format

writeCSV.cpp

    #include <fstream>
    
    void writeCSV(string filename, Mat m)
    {
       ofstream myfile;
       myfile.open(filename.c_str());
       myfile<< cv::format(m, cv::Formatter::FMT_CSV) << std::endl;
       myfile.close();
    }

Great! Simple and efficient. Thanks!