AR (augmented reality), is a technology that combines two-dimensional and / or three-dimensional virtual objects into a real environment and then projects these virtual objects in reality in real time. Augmented reality can be applied to all senses, including hearing, touch, and smell. Apart from being used in fields such as health, military, manufacturing and education. This AR technology can insert certain information into cyberspace and display it in the real world with the help of equipment such as webcams, computers, Android phones, and special glasses.
The method developed in Augmented Reality is currently divided into two methods, namely Marker Based Tracking and Markless Augmented Reality.
Marker Augmented Reality (Marker Based Tracking)
Marker is usually a black and white illustration of a square with a bold black border and white background. The computer will recognize the position and orientation of the marker and create a 3D virtual world, namely a point (0,0,0) and three axes namely X, Y, and Z.
Markerless Augmented Reality
One of the currently developing Augmented Reality methods is the “Markerless Augmented Reality” method, with this method users no longer need to use a marker to display digital elements, with tools provided by Qualcomm for the development of mobile device-based Augmented Reality, making it easier for developers. to create markerless applications (Qualcomm, 2012).
Algorithms on computers continue to be developed, this allows computers to recognize human faces in general by recognizing the position of human eyes, nose and mouth, then ignoring other objects around them such as trees, houses, and others.
3D Object Tracking
Unlike Face Tracking which only recognizes human faces in general, the 3D Object Tracking technique can recognize all forms of objects that are around, such as cars, tables, televisions, and others.
Computers can capture motion, Motion Tracking has begun to be used extensively to produce films that attempt to simulate motion.
GPS Based Tracking
The GPS Based Tracking technique is currently gaining popularity and is being developed in smartphone applications (iPhone and Android), by utilizing the GPS and compass features in the smartphone, the application will retrieve data from the GPS and compass then display it in the direction we want in real time there are even some applications displaying it in 3D.