I downloaded ARCore SDK to 1.3.0 and the latest update from the Play Store.
In previews version the Image Tracker worked fine.
But in the current version even if it recognize the image, the next frame there’s already large drift, even if the phone stays in place, and after a few frames there’s a need to locate the marker again…
Yes it’s not so stable as for example Vuforia, but I’m not sure if that’s intended. I did notice that using normal photo’s track better then for example AR marker like shapes or patterns. The earth image in the example does a pretty good job compared to just black and white patterns as well it’s added faster to the imag library than a black/white simple marker.