How to see UI image (static) only trough specific UI element of the Scroll Rect? (Scroll View)

I wonder is there some way to set static image to be visible only trough another ScrollRect UI element? (Trough Button in my case)

I would like to put some pictures under my ScrollRect of buttons and i want different picture to be visible only trough specific button in ScrollRect while i scrolling.

I know this is hard, but please help. I have tried with masking, different materials, i've shoveled whole internet , but i haven't found solution yet. This feature will mean very much to my application.

I'm using Unity 5.5.0f3