ARCore augmented Images not tracking outside

Question

I'm working on an app with Unity, in which I want to use ARCore's augemented Images to track Images outside, specifically Images of streetart. I took the pictures and when testing them at home on my Monitor they are easily found, but when I'm trying it in the real world, it does not work. Somehow the pictures are not recognized. I've tried about 20 different pictures of different designs and none of them worked outside. I also ran all of them through the arcoreimg tool and they all performed at 85-100, which is considered good. I'm stumped on how that could be and would appreciate any ideas on how to fix it.