Hey will the 3d object stays there itself if goes out of field of view ? I mean if you rotate your camera to another direction place one more object there and if you focus back on your laptop mouse pad. Will you find this 3d object staying there ?
This is most likely based on the user defined marker. This is actually a sample example from Vuforia. Basically, take a picture and convert it to marker at runtime. It works but is limited.