As described above, AR devices use several techniques for data projection and depiction. In the mentioned
marker system one easy-to-read and stable marker is used to serve as an identifier for the point where the augmented
reality object will be placed. With a video output device and a video camera, the user can see an augmented reality
object on the object in a real environment. 3D models can be identified using RFID. The technology identifies the
object itself and the associated 3D model. After identification the system can display the 3D model on the marker.
This solution also has its weaknesses.