AR must have three characteristics, otherwise it cannot be true
First, the combination of virtual and real.
This feature is the easiest to understand and the easiest to implement. Early mobile AR apps could use the screen to display enhanced images, and popular AR headsets or glasses are easier to do.
Second, real-time interaction.
Real-time means precise point in time. Real and virtual information should be aligned at precise point in time. Otherwise, the experience will be very poor, which is difficult to realize, especially the tracking and recognition of the real scene around the user and the user’s eye and body movements.
Interaction means control, the user has to control the device, we can also see the picture of AR in the movie, but the movie is lack of interaction. If it is used in reality, the user walks around for a while, the system behind will be ready, whether the user wants to control the AR display of new content.
Third, three-dimensional registration.
Registration here means the process of locating a virtual scene into a real environment. Specific implementation has simple methods and difficulties, simple way such as prepare a two-dimensional code in advance, scan the two-dimensional code and then display the corresponding virtual scene, this way can be used in specific occasions, but it is relatively low level. The current approach is to scan a marker, such as Microsoft’s HoloLens glasses, which use the camera to identify the surface of a table and then drop a virtual sand table onto the actual surface.