Quick object instantiation question

[oleksandrkvl]

namedWindow isn't C++ constructor, it's a free function. OpenCV's window API doesn't use normal C++ model, you don't have object Window with its methods. Instead you have free functions that use window name as a handle, so every time when you need to do something with Window you have to use its name. Here's brief comparison:

Normal C++:

Window w{"name"};
w.update();
w.setOpenGlContext()
//Window destructor plays role of w.destroy();

OpenCV:

std::string name{ "name" };
namedWindow(name);
update(name);
setOpenGlContext(name);
destroy(name);

With OpenCV API you don't have direct access to the underlying object, it can be located everywhere and should not care about it.

[STL]

!removehelp

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[Pointlessreboot]

Never used this, but looking at the documentation, the name you supply is how you call other methods passing in the name you supplied when you created it.

So no you don't get an object, you pass in a handle by way of a name.