How do I extract the coordinates of 2 white points of a USB camera?

I have an USB camera connected to the computer. It shows the image of a circle and 2 points.One of them is fixed, and the other moves continuously. The idea is to centralize the 2nd point, in order for both to be concentric.

I would like to extract the coordinates of both points and, with that, I will control a motor that acts on the position of the 2nd point. This iteration will only stop when the coordinates match.

I would really appreciate some help, since I am very new to image processing method. Thank you

[Philip G]

If the object you are looking for is very bright compared to the background, I would just use an intensity threshold to find spots (if you have a color camera - consider converting the image to black and white by just summing up all three color channels) like

img_binary=img>threshold;

After that you can easily find the positions where your bright spots are. Consider the functions bwlabel (that will group all connected "ones" in your binary matrix img_binary). Now you could just take the mean position of the identified groups by bwlabel to get the positions of your two spots. If your image is too noisy - consider imdilate before running bwlabel.

[David Pereira]

I see! Thank you, that was extremely helpful!