This document discusses augmented reality (AR) and its components. AR combines real and virtual worlds using real-time interactive systems registered in 3D. Key components of an AR system include head-mounted displays, tracking systems using GPS, digital compasses and orientation sensors, and mobile computing devices. The document explores examples of AR applications in education, military, tourism and more. Limitations include challenges with accurate tracking, orientation and computing power. The future of AR is predicted to include expanding computer interfaces into the real world through virtual screens, holograms and enhanced media.

1. 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

2. 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.

3. An augmented reality system is one that
Combine real n virtual world
Is interactive in real time
Is registered in 3D.
Augmented Reality System

4. Software based on
Augmented Reality …
Wikitude – Wiki attitude

5. 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.

6. 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

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

8. Head-mounted Displays
Just 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

9. Tracking and Orientation
The 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.

10. 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

11. Digital compass
A 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

12. Mobile Computing Power
Wearable 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.

13. Augmented VS Virtual Reality
Virtual 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

14. 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:

15. Using Augmented Reality
Military - 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.

16. Using Augmented Reality
Instant 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.

17. 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.

18. 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.

19. References …
http://www.metalliccloud.com/rob/future_thinking/
http://en.wikipedia.org/wiki/Augmented_reality
http://www.howstuffworks.com/augmented-
reality.htm
http://www.youtube.com/watch?v=tpaJBu4BEuA