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Introduction
Augmented Reality or AR is a view of the physical, real world environment that is augmented or enhanced by synthetic computer generated elements.
There are different types of Augmented Reality depending on the types of applications and use cases.
1. Marker based AR
These types of markers make use of specific visual markers like Aruco marker, QR code marker, Image marker etc.
2. Marker-less AR
Marker-less AR application recognises things that were not directly provided to the application beforehand. This scenario makes use of some colours, location, accelerometer and gyroscope values or features in the image to place the augmented object.
3. Projection based AR
This technology makes use of projectors or lights to artificially project items on a surface.
4. Superimposition based AR
Superimposition based augmented reality either partially or fully replaces the original view of an object with a newly augmented view of that same object.
Games such as Pokemon Go made use of marker-less AR and location services to place game characters with which the player can interact.
Superimposition and Projection based AR techniques are used to guide and help the doctors during the surgery.
AR can help enhance the shopping experience by making it more interactive with the customer. IKEA makes use of AR in its application.
AR is being used in CAD
https://www.realitytechnologies.com/augmented-reality/
https://stackoverflow.com/questions/27229465/difference-between-marker-based-and-markerless-augmented-reality
https://dev.to/theninehertz/what-is-augmented-reality--types-of-ar-and-future-of-augmented-reality--1en0