1. AUGMENTED
REALITY
-REALITY REINVENTED
IT-591 Gurpreet Kaur [L-2010-AE-10-MCA]

2. AGENDA
 Augmented Reality
 Augmented Reality System
 How it Works
 Motivation
 Characteristics
 AR vs VR
 Technology
 Applications & Examples

3. AUGMENTED REALITY
 Augmented Reality is a field of
computer research which deals with
combination of reality with computer
generated data.
 AR supplements reality, rather than
completely replacing it.
 It creates the illusion that the
virtual and real objects coexisted in
the same space.
AR can be thought of as the "middle ground“ between completely synthetic and
completely real.

4. AUGMENTED REALITY
SYSTEM
 An Augmented Reality
system generates a
composite view for the
user.
 It’s a combination of
the real scene viewed
by the user and a virtual
scene generated by the
computer that
augments the scene
with additional
information

5. THIS IS HOW AR WORKS.
 Pick A Real World Scene
 Add your Virtual Objects in it.
 Delete Real World Objects
 Not Virtual Reality since Environment Real.

6. MOTIVATION
 AR enhances a user’s perception of
interaction with the real world.
 The virtual objects display
information that the user cannot
directly detect with his own senses.

7. MOTIVATION(cont..)
 The information conveyed by the
virtual objects helps a user perform
real-world tasks.
 AR is a specific example of what is
known as: Intelligence Amplification
(IA):
using the computer as a tool to make a
task easier for a human to perform.

8. CHARACTERISTICS
 Discussion on the characteristics of
AR systems and design issues
encountered when building an AR
system.
 Blending the real and virtual poses
problems with focus and contrast
and some applications require
portable AR systems to be truly
effective.

9. CHARACTERISTICS(cont..)
 Besides a d d ing objects to a real
environment, AR also has the
potential to re m o ve them.
 Graphic overlays might be used to
remove or hide parts of the real
environment from a user. e.g., to
remove a desk in the real
environment, draw a representation
of the real walls and floors behind
the desk and "paint" that over the
real desk, effectively removing it

10. CHARACTERISTICS(cont..)
 AR might apply to all senses, not
just sight.
 AR could be extended to include sound.
 The user would wear headphones
equipped with microphones on the
outside. The headphones would add
synthetic,directional 3D sound, while the
external microphones would detect
incoming sounds from the environment

11. Augmented Reality vs. Virtual
Reality
Augmented Reality Virtual Reality
 System augments  Totally immersive
the real world environment.
scene.  Visual senses are
 User maintains a under control
sense of presence
in real world of system.
(sometimes aural and
 Needs a mechanism
to combine virtual proprioceptive senses
and real worlds too)

12. Technology
 Hardware:
 The main hardware components for augmented
reality are:
 Processor
 Display
 Sensors
 Input devices.
 Software and algorithms

13. DISPLAY
 Head-mounted Display(HMD)
 device paired to a headset such
as a harness or helmet
 Eye Glasses
 eye wear that employs cameras to
intercept the real world view and
re-display it's augmented view
through the eye pieces

14. DISPLAY(cont..)
 Contact Lenses
 Contain the elements for display
embedded into the lens including
integrated circuitry, LEDs and an
antenna for wireless
communication.
 Under development
 Virtual Retina Display
 a personal display device under
development .
 a display is scanned directly
onto the retina of a viewer's eye.

15. DISPLAY(cont..)
 Handheld
 a small display that fits in a user's
hand.
 Portable
 Ubiquitous
 Physical constraints of the user
having to hold the device
 Distorting effect
 Spatial
 makes use of digital projectors to
display graphical information.
 user is not required to carry
equipment or wear the display over
their eyes.
 can be used by multiple people at
the same time without each having
to wear a head-mounted display.

16. Tracking
Modern mobile augmented reality systems
use
one or more of the following tracking
technologies:
 Digital cameras and/or other optical
sensors
 Accelerometers
 Gyroscope
 device for measuring or
maintaining orientation
 RFID
 wireless non-contact system that uses radio-

17. Input devices
 speech recognition systems
 gesture recognition systems
 visual detection or from sensors embedded in a
peripheral device such as a wand, stylus, pointer,
glove or other body wear.

18. Computer
 analyzes the sensed visual and other data to
synthesize and position augmentations.

19. Software and Algorithms
 A key measure of AR systems is how
realistically they integrate augmentations with
the real world.
 The software must derive real world
coordinates, independent from the camera,
from camera images. This is called IMAGE
REGISTRATION.
 those methods consist of two parts.
 First detect points in the camera images.
 Second restores a real world coordinate system
from the data obtained in the first stage.

20. PERFORMANCE ISSUES
Augmented Reality systems are expected:
 To run in real-time so that the user can move
around freely in the environment
 Show a properly rendered augmented image.
Therefore, two performance criteria are placed
on the system:
 Update rate for generating the augmenting image
 Accuracy of the registration of the real and virtual
image

21. LIMITATIONS
Following are the limitations for updating the
generated
images
 Must be at 10 times/second
 More photorealistic graphics rendering

22. Augmented-Reality Application
 Medical
 Entertainment
 Military Training
 Engineering Design
 Robotics and Telerobotics
 Manufacture, Maintenance and
Repair
 Consumer Design

23. Medical

24. Entertainment

25. Defence

27. Education

28. Examples : Wikitude
 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.

29. Examples : ARSoccer (Iphone)
No matter
where you
are,
ARSoccer
draws up a
3D ball on
your floor
that you
can kick
around at
your
discretion.

30.  Google Sky Map
 Layar
 Color Blindness Simulator
 Junaio
 Kafkara Augmented Reality
And many more….

31. Thank You