Contents Introduction Augmented reality

Augmented reality system Augmenting our world Example – Wikitude

Implementation Components of AR system

Head mounted display Video see through Optical see through

Tracking & orientation Global positioning system Differential GPS Digital compass

Mobile computing Augmented Reality Vs Virtual reality History Using Augmented reality Limitations Looking into future.. Conclusion references

Introduction Augmented reality will truly change the way we view the world. Picture

yourself walking or driving down the street. With augmented-reality displays, which will eventually look much like a normal pair of glasses, informative graphics will appear in your field of view, and audio will coincide with whatever you see. These enhancements will be refreshed continually to reflect the movements of your head. In this article, we will take a look at this future technology, its components and how it will be used.

An augmented reality system is one that

Combine real n virtual worldIs interactive in real timeIs registered in 3D.

Augmented Reality System

Software based on Augmented Reality …

Wikitude – Wiki attitude

Wikitude –wiki attitude WIKITUDE World Browser

presents the user with data about their surroundings, nearby landmarks, and other points of interest by overlaying information on the real-time camera view of a smart-phone.

Implementation

To implement there are four things that we require to do find user’s locationfind user’s orientation (view)generating informationaugmenting it to user’s view

Find user’s location

Find user’s orientation (view)

Generate data

Augment generated data to user’s view

Here are the three components needed to make an augmented-reality system work: display tracking system mobile computing power

Components

Head-mounted DisplaysJust as monitors allow us to see text

and graphics generated by computers, head-mounted displays (HMDs) will enable us to view graphics and text created by augmented-reality systems

There are two basic types of HMDS:

video see-through optical see-through

Tracking and OrientationThe biggest challenge facing developers of

augmented reality is the need to know where the user is located in reference to his or her surroundings.

There's also the additional problem of tracking the movement of users' eyes and heads.

GPS – Tracking Technology Currently, the best tracking

technology available for large open areas is the Global Positioning System.

However, GPS receivers have an accuracy of about 10 to 30 meters, which is not bad in the grand scheme of things, but isn't good enough for augmented reality, which needs accuracy measured in millimeters or smaller. GPS Network

Digital compassA digital compass consists of

sensors to measure the earth's magnetic field, some conditioning of those sensor signals, and a microcontroller to interpret the data

Components Three magnetic sensors One tilt sensor

Mobile Computing PowerWearable computers

Mobile computing can be accomplished with help of wearable computers

A wearable computer is a battery powered computer system worn on the user’s body(belt, backpack etc).

It is designed for mobile & predominantly hand free operations often incorporating head mounted display & speech input.

Augmented VS Virtual RealityVirtual reality creates

immersive, computer generated environments which replaces real world\

Here the head mounted displays block out all the external world from the viewer and present a view that is under the complete control of the computer.

Virtual reality serves for at totally immersive environment . The senses are under control of the system.

The user is completely immersed is an artificial world and cut off from real world.

Augmented reality is closer to the real world. augmented reality add graphics, sounds & smell to the natural world, as it exists.

Thus it augments the real world scene in such a way that the user can maintain a sense of presence in that world.

That is ,the user can interact with the real world, and at the same time can see, both the real and virtual world co-existing.

User is not cut off from the reality

Using Augmented Reality

Education

In an Augmented Reality interface students can be seated around a table and see each other at the same time as a virtual heart floating in their midst. This results in conversational behavior that is more similar to natural face-to-face collaboration than to screen based collaboration [Kiyokawa 2002].

Once researchers overcome the challenges that face them, augmented reality will likely pervade every corner of our lives. It has the potential to be used in almost every industry, including:

Using Augmented RealityMilitary - The military has been devising uses for augmented

reality for decades. The idea here is that an augmented-reality system could provide troops with vital information about their surroundings, such as showing where entrances are on the opposite end of a building, somewhat like X-ray vision.

Augmented reality displays could also highlight troop movements, and give soldiers the ability to move to where the enemy can't see them.

Using Augmented RealityInstant information -Tourists and students

could use these systems to learn more about a certain historical event.

Imagine walking onto a Civil War battlefield and seeing a re-creation of historical events on a head-mounted, augmented-reality display. It would immerse you in the event, and the view would be panoramic.

Limitations Accurate tracking and orientation

For wearable augmented reality system, there are still enough computing power to create stereo 3D graphics

The size of AR systems is yet another problem.

Looking into future ……Expanding a PC screen to real

environment..program windows & icons appear as virtual devices in real space & are eye or gesture operated, by gazing or pointing.

Enhanced media application ,like pseudo holographic virtual screens, virtual surround cinema.

References …http://www.metalliccloud.com/rob/

future_thinking/http://en.wikipedia.org/wiki/

Augmented_realityhttp://www.howstuffworks.com/augmented-

reality.htmhttp://www.youtube.com/watch?v=tpaJBu4BE

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