如何在opencv中将3个矩阵合并为1个? [英] How to merge 3 matrices into 1 in opencv?

问题描述

我有三个矩阵，每个矩阵的大小为4x1.我想将所有这些矩阵复制到另一个大小为4x3的矩阵，并将其命名为R.有什么聪明的方法吗?

I have three matrices, each of size 4x1. I want to copy all of these matrices to another matrix of size 4x3 and call it R. Is there a smart way to do it?

推荐答案

您可以仅使用hconcat进行水平串联.您可以按矩阵使用它，例如hconcat(mat1，mat2，R)，或将其直接应用于向量或矩阵数组.

You can just use hconcat for horizontal concatenation. You can use it per matrix, e.g. hconcat( mat1, mat2, R ), or apply it directly on a vector or array of matrices.

这是示例代码:

vector<Mat> matrices = {
    Mat(4, 1, CV_8UC1, Scalar(1)),
    Mat(4, 1, CV_8UC1, Scalar(2)),
    Mat(4, 1, CV_8UC1, Scalar(3)),
};
Mat R;
hconcat( matrices, R );
cout << R << endl;

结果如下:

[1, 2, 3;
  1, 2, 3;
  1, 2, 3;
  1, 2, 3]
Program ended with exit code: 1

类似地，如果您想垂直进行(按行堆叠)，请使用vconcat.

Similarly, if you want to do it vertically (stack by rows), use vconcat.

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