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virtual reality Barkha manral seminar on augmented reality.ppt
Name :Barkha Manral
Enroll Roll no.
Augmented reality system
Augmenting our world
Example – Wikitude
Components of AR system
Head mounted display
Video see through
Optical see through
Tracking & orientation
Global positioning system
Augmented Reality Vs Virtual reality
Using Augmented reality
Looking into future..
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.
Augmented Reality is a field of
computer research which deals
with combination of reality with
computer generated data.
It is still in an early stage of
research and development.
possibly by the end of this decade,
we will see the first mass-marketed
An augmented reality system is one that
Combine real n virtual world
Is interactive in real time
Is registered in 3D.
The basic idea of augmented reality is to
superimpose graphics, audio and other
sense enhancements over a real-world
environment in real-time.
Sounds pretty simple. Besides, haven't
television networks been doing that with
graphics for decades?
These systems display graphics for only one
point of view. Next-generation augmented-reality
systems will display graphics for
each viewer's perspective.
Browser presents the user
with data about their
landmarks, and other
points of interest by
on the real-time camera
view of a smart-phone.
Mobile travel guide for the
Android platform (open
source OS for cell phones).
Plan a trip or find about
current surroundings in real-time.
To implement there are four things that we
require to do find user’s location find user’s
orientation (view)generating information
augmenting it to user’s view
Find user’s location
Find user’s orientation (view)
data to user’s view
Here are the three components needed to make an
augmented-reality system work :
mobile computing power
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
There are two basic types of HMDS:
They block out the wearer's surrounding environment, using small
video cameras attached to the outside of the goggles to capture images.
On the inside of the display, the video image is played in real-time and
the graphics are superimposed on the video. One problem with the use
of video cameras is that there is more lag, meaning that there is a delay
in image-adjustment when the viewer moves his or her head.
Optical see through is not fully realized yet .It is
supposed to consist of ordinary looking pair of glasses
that will have light source on the side to project images
onto the retina.
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
1.Where the user is located?
2.Where he/she is
Currently, the best tracking
technology available for large open
areas is the Global Positioning
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.
There are ways to increase
tracking accuracy. For instance,
the military uses multiple GPS
signals. There is also differential
GPS, which involves using an
area that has already been
surveyed. A more accurate
system being developed, known
as real-time kinematic GPS, can
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
Three magnetic sensors
One tilt sensor
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,
It is designed for mobile & predominantly hand
free operations often incorporating head
mounted display & speech input.
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
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
One of the identifying marks of a virtual reality
system is the head mounted display worn by
These displays block out all the external world
and present to the wearer a view that is under
the complete control of the computer.
In Augmented Reality, the user must still be
aware that he or she is present in the “real
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:
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].
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
Augmented reality displays
could also highlight troop
movements , and give soldiers
the ability to move to where
the enemy can't see them.
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.
Gaming - How cool would it be to take video
games outside? The game could be projected
onto the real world around you, and you
could, literally, be in it as one of the
characters. One Australian researcher has
created a prototype game that combines
Quake, a popular video game, with
augmented reality. He put a model of a
university campus into the game's software.
Now, when he uses this system, the game
surrounds him as he walks across campus.
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
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
Enhanced media application ,like
pseudo holographic virtual screens,
virtual surround cinema.
Replacement of cell phones: eye dialing,
insertion of information directly into
Virtual conferences in "holodeck" style .
Examples might be a virtual wall clock, a to-do
list for the day docked by your bed for
you to look at first thing in the morning, etc.
Enhanced media applications, like pseudo
holographic virtual screens, virtual surround
cinema, virtual 'holodecks' (allowing
computer-generated imagery to interact with
live entertainers and audience)
And the list goes on as your imagination….
Augmented reality will further blur the line
between what's real and what's computer-generated
by enhancing what we see, hear,
feel and smell.