How do i use this image tracking code for augmented reality?

Hello I have a code that I am using to track any red objects by placing a box around them and showing the pixel coordinated of this box. How would I substitute a picture in place approximately in the center of these red objects? For example, let’s say I held a red eraser, how would I place a football where the red eraser is? Thank you for all your help with my beginner knowledge of Matlab.

[Alexander Killam]

I actually meant to attach this matlab program. Thank you.