Acces Matrix value without knowing the type opencv

Question

I am writing a function in which I need to access to a element of a Mat, but this function can receive Mat of differents types. So, if I have:

Answer 1

If it is a possibility, make the function receiving the openCV Mat a template function:

void f(const Mat& m)
{
    (void) m.at(0, 0);
}

use it like that:

Mat m1/* ... */;
m1.at(0, 0) = 0;
f(m);