Opencv学习笔记1(Mat The basic image container)

Posted 2021-04-25 军军的测试集

过去几个月因为毕业的事情一团糟，同时由于担心延期而七上八下的，因此学习计划一再被打乱。现在的空余时间稍微多了那么一点，尽量保持更新吧！

此外，经我和师弟们讨论认为：未来比较适合机械学生的方向大概是会点机械设计，会点编程。而我大概也会沿着这些模糊的路摸索，尽量向这些方向前进！

最近大概会学习OpenCV：参考资料主要就是官网的资料，以及毛星云的《OpenCV3》。本来是打算在Ubuntu系统跑这些程序的，现在的笔记本在Ubuntu上存在一些系统，而我的新笔记本暂时还没有买，暂时也不讨论安装的事情，就闲用VS先凑合着吧！

Mat

Mat A, C;                          // creates just the header parts

A = imread(argv[1], IMREAD_COLOR); // here we'll know the method used (allocate matrix)

Mat B(A);                                 // Use the copy constructor

C = A;                                    // Assignment operato

当需要连带矩阵数据也复制的时候，则采用以下函数：

cv :: Mat :: clone（）和cv :: Mat :: copyTo（）

Storing methods

Creating a Mat object explicitly 

1.  

    Mat M(2,2, CV_8UC3, Scalar(0,0,255));

2.  

     int sz[3] = {2,2,2};

     Mat L(3,sz, CV_8UC(1), Scalar::all(0));

3.

    M.create(4,4, CV_8UC(2));

    out << "M = "<< endl << " "  << M << endl << endl;

4.

    Mat E = Mat::eye(4, 4, CV_64F);

    cout << "E = " << endl << " " << E << endl << endl;

    Mat O = Mat::ones(2, 2, CV_32F);

    cout << "O = " << endl << " " << O << endl << endl;

    Mat Z = Mat::zeros(3,3, CV_8UC1);

   cout << "Z = " << endl << " " << Z << endl << endl;

5.

    Mat C = (Mat_<double>(3,3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);

    cout << "C = " << endl << " " << C << endl << endl;

    C = (Mat_<double>({0, -1, 0, -1, 5, -1, 0, -1, 0})).reshape(3);

    cout << "C = " << endl << " " << C << endl << endl;

6.

    Mat RowClone = C.row(1).clone();

    cout << "RowClone = " << endl << " " << RowClone << endl << endl;

Output formatting

Output of other common items