Question Revealing Image with AR – Hovering over image

Hello, I need help urgently.
I am currently trying to make a poster with AR integration, where the viewer can move the smartphone over the poster and then the image section underneath becomes visible - like when you move a magnifying glass over an image.
The AR content should also only be visible when the smartphone is close to the image.
Is there a solution for this, or at least a partial solution?
I would be extremely grateful!
Thanks a lot!
Blah

 

You can use image detection to detect the image, and then if the distance between the image anchor and camera is under a treshhold spawn the object (or enable the renderer)

 

Maybe this gives you some inspiration in your case: AR Portal.
I believe this can be combined with Image Tracking as well.

There is also a kind of AR Visiting Card example.