What are the different types of Augmented Reality technologies?
There are mainly three types of Augmented Reality (AR) technologies - marker-based AR, markerless AR, and projection-based AR. Marker-based AR relies on markers or visual cues to superimpose virtual content onto the real world. Markerless AR uses computer vision algorithms to track and augment objects in the environment without the need for markers. Projection-based AR projects virtual images onto real-world surfaces, creating an augmented experience.
Long answer
Augmented Reality technologies encompass a variety of techniques that enhance our perception of the real world by overlaying digital content onto it. Three major types of AR technologies can be distinguished: marker-based AR, markerless AR, and projection-based AR.
Marker-based AR relies on visual cues, such as markers or fiducial markers, which are recognized by a camera or sensor-equipped device. These markers act as triggers for projecting corresponding digital content onto the physical world. By tracking these markers’ positions and orientations, virtual objects can be precisely superimposed over printed images, objects with specialized markings, or even body landmarks.
Markerless AR moves beyond the reliance on markers by utilizing computer vision algorithms to understand and interpret the real-world environment. It analyzes features like edges, corners, textures, or patterns in the captured video feed to recognize objects or scenes accurately. Markerless AR systems leverage techniques such as Simultaneous Localization and Mapping (SLAM) to track camera movements in relation to the surroundings while augmenting digital content onto appropriate locations.
Projection-based AR utilizes projectors to display virtual imagery directly onto surfaces in the physical world around us. By mapping virtual content onto specific points on scene surfaces using advanced calibration techniques, users can interact with projected information as if it were part of their immediate physical environment. Projection-based AR is often used for immersive experiences in gaming, interactive marketing installations, or architectural visualization.
These different types of Augmented Reality technologies have unique advantages and applications depending on user requirements, device capabilities, and the desired user experience. While marker-based AR offers precise tracking and registration, markerless AR provides a more seamless and natural integration with the real world. Projection-based AR creates dynamic interactive environments by combining digital projections with physical elements, offering immersive experiences in various domains.