使用2D数组初始化OpenCV Mat [英] initialize an OpenCV Mat with an 2D array

问题描述

在我的应用程序中，我想创建一个具有某些值的OpenCV Mat A(二维)，然后使用A作为输入将其传递给另一个OpenCV函数.

In my application, I want to create a OpenCV Mat A (2-Dimensions) having some values and then pass it to another OpenCV function using A as input.

当前，我正在尝试:

// float data[2][5] = {{1,2,3,4,5},{7,8,9,10,11}}; 
// OR
float data[10] = {1,2,3,4,5,7,8,9,10,11};

// and then
//  A = Mat(1, 5, CV_32FC1, &data, 2);   // init from float 1D - array
// OR 
    A = Mat(2, 5, CV_32FC1, &data, 2);  

如果是一维数组，则可以传递值.但这不适用于2D阵列，这是更常见的情况.如何在OpenCV中解决此问题?

in case of 1D array, the value passing is OK. But this does not work for 2D array, which is even more a common case. How can I solve this in OpenCV??

推荐答案

通常，我使用了OpenCV在线指南中的助记符:

orginally, I used the mnemonic from OpenCV online guides:

Mat::Mat(Size size, int type, void* data, size_t step=AUTO_STEP)

但是我不明白"size_t step = AUTO_STEP"是什么意思.这意味着我可以省略"step"参数，OpenCV将使用该参数自动选择AUTO_STEP

But I didn't understand what the document means by "size_t step=AUTO_STEP". And this means that I can ommit 'step' argument with which OpenCV will automatically chooses AUTO_STEP

我已经尝试过，并且可以正常工作:

I've tried and this works:

A = Mat(2, 5, CV_32FC1, &data);

用于从数组初始化的2D Mat

for the 2D Mat initialized from array

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