c++ opencv 打印输出矩阵

fstream outFile1;
outFile1.open("test1.csv", ios::out);
outFile1 << "==Numpy风格==n" << cv::format(plane[0], cv::Formatter::FMT_NUMPY) << std::endl;

打印格式可选：

    enum { FMT_DEFAULT = 0,
           FMT_MATLAB  = 1,
           FMT_CSV     = 2,
           FMT_PYTHON  = 3,
           FMT_NUMPY   = 4,
           FMT_C       = 5
         };

结果将保存在test1.csv文件夹下。