How to calculate pearson correlation from an MRI image

Please help me in solving my problem. How can be pearson correlation could be calculated from an MRI image.

[Rik]

Have a read here (or here for more general advice). It will greatly improve your chances of getting an answer.

This question has the exact same problem as your previous question. You are trying to do many steps in one go, without explaining what it is you want to do.