How to prroperly manage ROIs witth ARM NEON Compute Library

hello,

I’m using the ARM Compute Library for a project where i have to make operations on images (add, sub, copy…)
I need to manage full images or ROIs(so making operations only on small part of the input images).
I could make it work for the full images, but I’m having troubles in working with ROIs.

Do you have any sample code or hint how to manage ROIs in images?
Are there specific methods to manage them ?

Thanks a lot!