I'm currently experimenting with the AugmentedImage support in ARCore. Does anyone know how to check if an image target is currently on screen? I have an image target being recognised and anchoring a gameobject to that position, however I can't figure out how to check if a target is no longer visible and thus destroy it. This use case is different pages of a book, so multiple different targets appearing in the same physical space. I have tried TrackingState.Paused and TrackingState.Stopped but as far as I can tell that seems to be returning the tracking of that anchor point rather than the image target.