How can i find the center of one particle (only blue color) in a image?

In my code, I visualized the motion of one particle using cross-correlation. Now I want to find the center of each particle (on the individual images). My idea is to determine the maximum and minimum of the rows and columns and then average these values. Unfortunately, I don't have much experience in Matlab and I don't know how to implement this. Therefore, it would make me very happy if someone could help me.

Answer 1

[Image Analyst]

See attached demo where I track the motion of a green Sharpie marker.