C ++：为什么我不能使用Opencv访问Node类？

Question

Hi I am writing a C++ program using OpenCV. I make sure to include the necessary files:

#include "opencv2/core/core.hpp"
#include "opencv2/ml/ml.hpp"

Everything using opencv works fine and dandy. But when I refer to Node in the following line:

    std::vector<Node> nodeList = forest->getNodes();

I get the following error:

error: use of undeclared identifier 'Node'

I don't understand why, because it recognizes all the other opencv classes. There is probably a simple explanation for this but I don't see it right now. Any help would be greatly appreciated!

Answer 1

Try the full name of the node class cv::ml::DTrees::Node . and if you want to define a vector with a certain size do this:

std::vector<Node> nodeList(forest->getNodes().size());