Moving a servo with Open Mv camera

hi, we are 4 people in a scientific class. We have a school project to construct.
It's a sort of trolley that follow a people.
in order to move the trolley from left to right, We have to detect the position of the person using a camera, connected in I2C through an arduino uno board.
We don't know how to set the connection between open Mv cam and arduino (Pull up needed?)
So We need help in order to programm the link between the cam and the board.
we have put a little schematic to explain briefly the project.
thanks for the help!

we have put a little schematic to explain briefly the project.

On the back wall of the closet in your bedroom?

You'll likely need a faster processor to process video and determine what's changed to indicate movement.