Which function should I use to interpolate (boundaries set by fillPolly)

C++
4

hehe, that’s actually, what filters do:

Mat ocv = Mat::zeros(10,10,CV_8U);
ocv(Rect(3,3,4,4)) = 3;
cout << ocv << endl;

blur(ocv,ocv,Size(3,3));
cout << ocv << endl;

[  0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   3,   3,   3,   3,   0,   0,   0;
   0,   0,   0,   3,   3,   3,   3,   0,   0,   0;
   0,   0,   0,   3,   3,   3,   3,   0,   0,   0;
   0,   0,   0,   3,   3,   3,   3,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0]

[  0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   1,   1,   1,   1,   0,   0,   0;
   0,   0,   1,   1,   2,   2,   1,   1,   0,   0;
   0,   0,   1,   2,   3,   3,   2,   1,   0,   0;
   0,   0,   1,   2,   3,   3,   2,   1,   0,   0;
   0,   0,   1,   1,   2,   2,   1,   1,   0,   0;
   0,   0,   0,   1,   1,   1,   1,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0;
   0,   0,   0,   0,   0,   0,   0,   0,   0,   0]

(to get exactly your output above you’d probably have to dilate your square 3 pixels)

(and the blur() is just an example, there are a lot more builtin filters in opencv, you can even use your own kernels)

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