在“Mat”中加入矩阵元素，对象（不是CvMat对象）在OpenCV C ++ [英] Accesing a matrix element in the "Mat" object (not the CvMat object) in OpenCV C++

问题描述

有没有人有任何想法如何访问元素的row，col在OpenCV 2.0的新的Mat类？文档链接如下，但我没有能够对它有任何意义。
http://opencv.willowgarage.com/documentation/cpp/basic%5Fstructures。 html＃mat

Does anyone have any idea how to access elements by row, col in OpenCV 2.0's new "Mat" class? The documentation is linked below, but I have not been able to make any sense of it. http://opencv.willowgarage.com/documentation/cpp/basic%5Fstructures.html#mat

推荐答案

关于文档：

http://docs.opencv.org/2.4/modules/ core / doc / basic_structures.html＃mat

它说：

（...）如果你知道矩阵元素
类型，例如它是float，那么你可以在<>（）方法中使用

(...) if you know the matrix element type, e.g. it is float, then you can use at<>() method

也就是说， p>

That is, you can use:

Mat M(100, 100, CV_64F);
cout << M.at<double>(0,0);

也许更容易使用 Mat _ 类。它是 Mat 的模板包装器。
Mat _ 具有运算符（）重载以访问元素。

Maybe it is easier to use the Mat_ class. It is a template wrapper for Mat. Mat_ has the operator() overloaded in order to access the elements.

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