访问“Mat"中的矩阵元素OpenCV C++ 中的对象(不是 CvMat 对象)
如何在 OpenCV 2.0 的新Mat"类中按行、列访问元素?文档链接如下，但我无法理解它.http://opencv.willowgarage.com/documentation/cpp/basic_structures.html#mat
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_structures.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，例如它是浮动的，那么你可以使用 at<>() 方法
(...) if you know the matrix element type, e.g. it is float, then you can use at<>() method
也就是说，您可以使用:
That is, you can use:
Mat M(100, 100, CV_64F);
cout << M.at<double>(0,0);
也许使用 Mat_ 类更容易.它是 Mat 的模板包装器.Mat_ 重载了 operator() 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.
相关文章