Thank you Tom. I researched a little after your answer .
i found more info and a graduation project in this blog >> http://www.recepboydak.com/2014/04/pin-pon-topu-yakalayan-robot.html
You are right, this project has an image processing via pc . i want to use Processing for image processing part it's doing red object tracking for finding ping pong ball , i can do it. But i havent idea for servo control with arduino i need your help?