如何访问一个3D矩阵切片的OpenCV [英] How to access slices of a 3d matrix in OpenCV

问题描述

我想592 47x47阵列存储到一个47x47x592矩阵。我创建的3D矩阵如下：

I would like to store 592 47x47 arrays into a 47x47x592 Matrix. I created the 3d Matrix as follows:

int sizes[] = {47,47,592};
Mat 3dmat(3, sizes, CV_32FC1);

然后我想我可以通过使用一组范围如以下访问它。

I then thought I could access it by using a set of ranges as in the following.

Range ranges[3];
ranges[0] = Range::all();
ranges[1] = Range::all();
ranges[2] = Range(x,x+1) //within a for loop.
Mat 2dmat = 3dmat(ranges);

然而，当我尝试使用copyTo功能输入现有的数据集，这是行不通的。

However, when I try to use the copyTo function to input an existing data set, it does not work.

data.copyTo(2dmat); //data is my 47x47 matrix

的3D矩阵，当我这样做没有得到更新。

The 3d matrix does not get updated when I do this.

任何信息AP preciated！谢谢！

Any information is appreciated! Thanks!

编辑：我的592的矩阵存储在此3D矩阵，这样我可以稍后再访问另一个循环每一个单独的47x47矩阵。所以，我以后会做这样的事吧。

edit: I store the 592 matrices in this 3d matrix so that I can then later access each of the individual 47x47 matrices in another loop. So I would later do something of this sort:

2dmat = 3dmat(ranges);
2dmat.copyTo(data);

所以，我会再进行使用此数据矩阵的一些操作。并在循环的下一次迭代中，我会使用下一个存储的数据矩阵

So I would then perform some operations using this data matrix. And in the next iteration of the loop, I would use the next stored data matrix.

推荐答案

这是另类的，基于矢量的解决方案：

An alternative, vector-based solution:

std::vector<cv::Mat> mat(592, cv::Mat(47, 47, CV_32FC1)); // allocates 592 matrices sized 47 by 47
for(auto &m: mat) {
    // do your processsing here
    data.copyTo(m);
}

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