Tracking Methods in Augmented Reality – Explore the Usage of Marker-Based Tracking

Abstract

The advancement in technology has created new challenges using different techniques. Augmented Reality (AR) is the amalgamation of a true object viewed by a user which is augmented by the virtual scene generated by a computer with additional information. In AR, the system augments with the help of a mechanism to combine virtual and real-world but the user maintains a sense of presence in real-world. It is one of the emerging technologies that has attracted researchers in the field of enhancing information for education and training, product visualization, and virtual try in the field of marketing, finding a way for tourism and many more applications to a very great extent. A lot of factors influence an effective AR experience. A discussion is carried on about the important factors like Graphical rendering, Tracking, Calibration, display that contributes to an effective AR experience depending on the AR application. This article highlights different tracking techniques that can be classified as Sensor-based and Vision-based tracking. Sensor-based tracking can additionally be divided into other tracking such as Optical, Magnetic, Acoustic, and Inertial. Vision-based tracking is further categorized into Marker-based and Markerless Tracking. The usage of the tracking technique depends on the AR application. This paper projects the advantages and disadvantages of each of these tracking techniques which are listed out. Finally, the article deals with the requirements of marker based application and its usage in detail.

Keywords: Augmented Reality (AR) Virtual Reality (VR) Degrees of Freedom (DOF) Real-time Attitude Position-Determination (RAPiD)