Augmented reality system basics | How Augmented Reality works

This page covers Augmented reality System basics and mentions how Augmented Reality works. It mentions working of Augmented reality System including its various components.

The concept of Augmented Reality (AR) was unnoticed till people started playing online game "Pokemon Go". Now many android and iOS applications have been developed based on AR concept.

The AR is basically combination of real environment and virtual object. This is depicted in the figure-1. The physical or real environment surrounding us is superimposed and enhanced with some virtual elements as shown in the figure.

Augmented Reality System

Following are key characteristics of Augmented Reality System:
➨Overlapping of real world and digital world
➨Registration and alignment in 3D
➨Real time interaction

Examples of Augmented Reality:
• Virtual Dressing Rooms: The proposed buyer can select the clothes and accessories and try on self without buying the product. They need not have to try the same physically.
• In military, the concept helps soldiers to have battlefield data in real time on their AR compliant goggles. This will help them overcome potentially dangerous situations.
• Online games and apps such a Pokemon Go etc.

How Augmented Reality works | Augmented Reality Components

The figure-2 depicts main components of augmented reality system. As shown it consists of sensors/tracking, user input devices, CPU and display/output devices.

Augmented Reality System Components

It includes accelerators, optical sensors (captures visual image of users environment in field of view), GPS receiver (to keep track of users geographical location and movements) , compass (determines geographical orientation of the user ) and gyroscope (determines rotational movement along with roll, yaw and pitch.

User input devices:
It includes microphone, touch screen and gesture devices.

The different types of CPU are available to be used in AR system.

Display/output devices:
It includes various wearable devices to have outputs in the form such as visual, audible and haptic.

Following are the types of Augmented Reality systems. The working of each of these methods is different but basic components are same as listed.
➨Marker based Augmented Reality: Utilizes QR code scanning using mobile camera. The QR code pattern is recognized by software. It superimposes digital image on mobile screen and provides 3D image.
➨Location based Augmented Reality: Utilizes smartphone and GPS app. GPS software recognises locaion of the device in the app. The digital information data is matched with real scene which is captured through camera of smartphone. Navigation is one of the application used here as per this method.
➨Superimposition based Augmented Reality: In this type, augmented view is being superimposed on real view of the object.
➨Projection based Augmented Reality: In this type, virtual images are projected onto physical objects. In this type, one can touch and feel the virtual image with the hands.

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