Reset origin in ARCore app through Vuforia?

Hello, I'm currently working on an augmented reality app, using ARCore. Everything works fine, except that it's easy to lose tracking (for example, when the camera lens is covered for a brief moment). Also, currently, I need to hold the mobile device in an exact orientation in order for the scene to load all objects in the right place. Is there a way to use Vuforia image tracking to let users focus on an image that will reset the origin and orientation of the scene/camera? Thanks in advance!