Hello all,

I have an image with white background and a single blackdot on it. I was wondering if there is any function to read the pixels of an image to find the blackdots position by calculating the centroid of the black dot.

I am new to opengl and c++ programming, i would appreciate if anyone can help me with identifying the blackdot.

Thanks for your time

Check out glReadPixel !
Put that word on Google and see

One more things if u have an "image" then dont need OpenGl funtion. Loop through the image check if its Color is 0,0,0 then that is the black dot