opencv C++ Mat构造函数

   cv::Scalar scalar1(v);  
    cv::Mat mat3(size,CV_8UC1,scalar1);
    std::cout<<mat3<<std::endl;
    std::cout<<std::endl;

    int a[2][3][3]={
        {{0,0,0},{0,0,0},{0,0,0}},
        {{0,0,0},{0,0,0},{0,0,0}}
    };
    cv::Mat mat4(2,a[0][0],CV_8UC1);
    std::cout<<mat4<<std::endl;
    std::cout<<std::endl;

    std::vector<std::vector<int>> arr2(2,std::vector<int>(3,20));  // 创建二维数组
    //std::vector<int>arr2(2);
    cv::Mat mat5(arr2,CV_8UC1);
    std::cout<<mat5<<std::endl;
    std::cout<<std::endl;

    cv::Mat mat6=(cv::Mat_<double>(2,3)<<1.2,1.3,0.1,0.5,9.3,8.6);
    std::cout<<mat6<<std::endl;
    std::cout<<std::endl;
    return 0;
}