用二维数组初始化 OpenCV Mat [英] initialize an OpenCV Mat with an 2D array

问题描述

在我的应用程序中，我想创建一个具有一些值的 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.

目前，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);  

对于一维数组，值传递是可以的.但这不适用于二维数组，这是更常见的情况.我如何在 OpenCV 中解决这个问题?

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

最初，我使用了 OpenCV 在线指南中的助记符:

Originally, I used the mnemonic from OpenCV online guides:

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

但我不明白文档中size_t step=AUTO_STEP 的含义.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 meant by size_t step=AUTO_STEP. And this means that I can omit the step argument with which OpenCV will automatically choose AUTO_STEP

我试过了，这很有效:

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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