This document discusses augmented reality, including what it is, how it works, and its applications. Augmented reality (AR) overlays computer-generated sensory input such as sound, video, graphics or GPS data over a live direct or indirect real-world environment. AR systems add virtual objects to the real world in real-time by using head-mounted displays, smartphones or other devices. Some key applications of AR discussed include use in medical, entertainment, military training, engineering, manufacturing and education. The ultimate goal of AR is to create a system where users cannot distinguish between real and virtual elements.

1. 1
Augmented Reality
Prepared by:
Khyati Ganatra
(12CE082)

2. Topics discussed
AugmentedReality
AugmentedRealitySystem
HowitWorks
Displaytechniques
AR vsVR
Technology
Applications&Examples
Feb4, Spring 2002 CS 7497 2

3. What is Augmented
Reality?
Acombinationofareal
sceneviewedbyauser
andavirtualscene
generatedbyacomputer
thataugmentsthescene
withadditional
information.
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4. 4
AnAR systemadds
virtualcomputer-
generatedobjects,
audioandother
senseenhancements
toareal-world
enviornmentinreal
time.

5. 5
What is the Goal of AR?
Toenhanceaperson’sperformance
andperceptionof theworld
But,whatistheultimategoal????

6. 6
The Ultimate Goal of AR
Createasystemsuchthatauser
CANNOTtellthedifferencebetween
therealworldandthevirtual
augmentationof it.

7. 7
Augmented Reality vs.
Virtual Reality
AugmentedReality
Systemaugmentsthe
realworld scene
Usermaintainsa
senseof presencein
real world
Needsamechanism
tocombinevirtual
andreal worlds
VirtualReality:
Totallyimmersive
environment
Visualsensesare
undercontrolof
system(sometimes
auraland
proprioceptivesenses
too)

8. Miligram’s Reality-
Virtuality Continuum
MixedReality (MR)
Real
Environmen
t
Virtual
Environment
Augmented
Reality(AR)
Augmented
Virtuality(AV)
Miligramcoinedtheterm“AugmentedVirtuality”toidentify
systemswhicharemostlysyntheticwithsomerealworld
imageryaddedsuchastexturemappingvideoontovirtual
objects.
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9. This is how AR works
PickARealWorldScene
AddyourVirtualObjectsinit.
DeleteRealWorld Objects
NotVirtualRealitysince
Environment Real.
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10. DISPLAY
Head-mounted
Display(HMD)
– device paired to
a headset
such as a
harnessor helmet
Eye Glasses
– eyewearthatemploys
cameras to intercept
the real world view and
re-display it's
augmented
vie
w through the eye
pieces 10

11. DISPLAY(cont..)
Contact Lenses
– Contain the elements for display
embedded into the lens including
integratedcircuitry
,LEDs andan
antenna for
w
ireless
communication.
– Under development
Virtual Retina Display
– a personal display device under
development .
– a display is scanneddirectly onto
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12. DISPLAY(cont..)
Handheld
asmalldisplaythatfitsinauser'shand.
Portable
Ubiquitous
Physicalconstraintsof theuserhavingtoholdthedevice
Distorting effect
Spatial
makes use of digital projectors to display
graphical information.
userisnotrequiredtocarryequipmentorwearthe display
overtheir eyes.
canbeusedbymultiplepeopleatthesametimewithout
eachhavingtowearahead-mounteddisplay
.
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13. 13
Display Technologies
Monitor Based
HeadMounted Displays:
– Video see-through
– Optical see-through

14. Monitor Based Augmented
Reality
Simplest available
Littlefeelingof beingimmersedin
environment
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15. Optical see-through HMD
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16. Video see-through HMD
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Feb4, Spring 2002 CS 7497

17. 17
Video Composition
for Video see-through HMD
Chroma-keying
– Usedforspecial effects
– Backgroundof computergraphicsimagesis
settoaspecificcolor
– Combiningstepreplacesallcoloredareas
withcorrespondingpartsfrom video
Depth Information
– Combinerealandvirtualimagesbyapixel-
by-pixeldepth comparison

18. 18
Advantages of
Video see-through HMD
Flexibilityincompositionstrategies
Widefieldof view
Realandvirtualviewdelayscanbe
matched

19. 19
Advantages of
Optical see-through HMD
Simplicity
Resolution
Noeye offset

20. 20
Applications
Medical
Entertainment
MilitaryTraining
Engineerin
g Design
Roboticsand
Telerobotics
Manufacturing,
Maintenance,and
Repair
Consumer Design
Hazard Detection
Audio

21. Medical
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22. Entertainment
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23. Defence
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24. Education
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25. THANK YOU
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