Finding the center of a contour using opencv and visual c++

Question

I want to find the center of a contour without doing so much calculations. Is there a built in function for that in opencv?

Answer 1

Either you haven't done any research, or these questions already asked and answered here are not what you are asking:

centroid of contour/object in opencv in c?

OpenCV 2 Centroid

If latter is the case, please elaborate the question in more detail.

Answer 2

To answer your question:

There is no built in function. Checkout berak for copypasta code that solves your problem.

Answer 3

for the 'geometric center', get the boundingRect() of the contour, then:

   cx = br.x+br.width/2; cy = br.y+br.height/2; 

for the 'center of mass' get the moments() of the contour, then:

   cx = m.m10 / m.m00;   cy = m.m01 / m.m00;