Reality Technologies - The Conceptual Framework by Sudhir Warier

Author:Sudhir Warier [Warier, Sudhir]
Language: eng
Format: azw3
Publisher: Cognitio
Published: 2017-08-16T04:00:00+00:00

3.1Augmented Reality Categories

Augmented Reality (AR) technologies can be categorized based on the application context. The four primary categories include:

Marker Based Augmented Reality

Marker-based augmented reality employs visual markers to provide additional inputs to a user. Marker based AR systems provide the augmented view of the environment only when triggered by the user (manual and/or automatic). The simplest method uses a visual marker in the form of a QR/2D code that provides additional information when sensed by the reader (Example – Camera). QR codes provide a means of easy recognition and the advantage of low processing power for detection. The detection of the marker by the sensing mechanism will provided the augmented information.

Marker based AR applications are hard coded and hence simpler than the other categories of AR systems. The AR system also does not require positional sensors, accelerometers or compass.

Example 5

Google Goggles (provides information about a real image – if available in the Google database)

Natural Feature Tracking (NFT) is a special case of marker based AR that uses the real view as a marker. A feature detection mechanism embedded within the application identifies a unique, reproducible feature or point in the real environment, which can be used as a marker (fiducial marker).

Markerless Augmented Reality

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