elec virtual reality ppt

8/17/2019 Elec Virtual Reality PPT

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Seminar

OnVirtual Reality


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Content

Introduction History Principle Components Types Architecture of VR System

Application Advantages Disadvantages

Conclusion


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INTRODUCTION

What is Virtual Reality(VR)?

Virtual Reality refers to a high-end user interface that involves real-time simulation and interactions through multiple sensorial channels.

.Why VR?

VR is able to immerse you in a computer-generated world of your

own making: a room, a city, the interior of human body. With VR, youcan explore any uncharted territory of the human imagination.


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Brief History

n !"#$s, flight simulators were built by %& 'ir(orce to train student pilots.

n !")#, a research program for computer

graphics called *+he %ltimate isplay was laidout. n !", commercial development of VR began. n !""!, first commercial entertainment VR

system /Virtuality/ was released


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Principle

The Virtual Reality System !or"s on thefollo!ing principle # It trac"s the physicalmovements in the real !orld$ then arendering computer redra!s the virtual

!orld to re%ects those movements The updated virtual !orld is sent to the

output &to the user in the real !orld' In this case$ the output is sent (ac" to a

head mounted display Hence$ The user feels )immersed) in the

virtual !orld # as if she !as in the virtual!orld itself as all she can see is herrendered movements in the virtual !orld


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mponents of virtual reality systems

REALITY ENGINE HEAD OUNTED DI!"LAY #HD$ AUDIO UNIT! GLO%E!


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Reality engines Reality engines are (ased largely on the same components that

ma"e up a personal computer &PC'$ although much morecomputing po!er is re*uired for the reality engine than is availa(lein a standard PC

Virtual reality images are made !ith tiny dot li"e segments of a

picture "no!n as pi+els$ or picture elements ,ach pi+el itself is made up of hundreds of thousands of dots

Realistic images can (e either opa*ue$ in !hich all the vie!er seesis the virtual !orld$ or see#through$ in !hich the virtual image ispro-ected or superimposed onto the outer !orld


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EAD OUNTED DI!"LAY Head#mounted display &H.D' units use a small screen or screens

&one for each eye' that are !orn in a helmet or a pair glasses/nli"e a movie$ !here the director controls !hat the vie!er sees$the H.D allo!s vie!ers to loo" at an image from various angles orchange their 0eld of vie! (y simply moving their heads H.D units

usually employ cathode#ray tu(e &CRT' or li*uid crystal display&1CD' technology

CRTs incorporate optic systems that re%ect an image onto thevie!er2s eye Although more (ul"y and heavy than 1CD displays$CRT systems create images that have e+tremely high resolutions$ma"ing a scene seem that much more realistic

civilian3commercial &medicine$ video gaming$ sports$ etc'


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AUDIO UNIT! The audio portion of virtual reality is transmitted through small

spea"ers placed over each ear Audio cues may include voices$singing$ thud li"e noises of colliding o(-ects4in short$ any soundthat can (e recorded

Sounds that seem to come from a(ove$ (elo!$ or either side

provide audio cues that mimic ho! sounds are heard in the real!orld Three#dimensional &or omnidirectional' sound furtherenhances the virtual reality e+perience


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GLO%E! 5loves in virtual reality allo! the user to interact !ith the virtual

!orld 6or e+ample$ the user may pic" up a virtual (loc"$ turn itover in a virtual hand$ and set it on a virtual ta(le

7ired !ith thin 0(eroptic ca(les$ some gloves use light#emittingdiodes &1,Ds' to detect the amount of light passing through theca(le in relation to the movement of the hand or -oint

The computer then analy8es the corresponding information andpro-ects this moving hand into the virtual reality .agnetic trac"ingsystems also are used to determine !here the hand is in space inrelation to the virtual scene


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Types of %irtual Reality

Har&'are

Primary user input interfaces Trac"ing interfaces Visual interfaces Auditory interfaces Haptic interfaces

9lfactory interfaces

!oft'are

Input Process Simulation Process Rendering Process

7orld Data(ase


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Architecture of VR System

nput 0rocessor, &imulation 0rocessor,Rendering 0rocessor and World

atabase.

li i f i l


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Applications of %irtualReality

Entertainment • 1ore vivid

• 1ove exciting• 1ore attractive

Medicine − 0ractice performing surgery.

− 0erform surgery on a remote patient.

− +each new skills in a safe, controlled environment.


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Applications of %irtual Reality

1anufacturing• 2asy to modify

• 3ow cost

• 4igh efficient 2ducation 5 +raining

• riving simulators.

•

(light simulators.• &hip simulators.

• +ank simulators.


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A&vanta(es

.any di:erent 0elds can use VR as a !ay to train students!ithout actually putting anyone in harm2s !ay This includesthe 0elds of medicine$ la! enforcement$ architecture andaviation VR also helps those that can2t get out of the housee+perience a much fuller life

These patients can e+plore the !orld through virtual

environments li"e Second 1ife$ a VR community on theInternet$ e+ploring virtual cities as !ell as more fancifulenvironments li"e ;RR Tol"ien2s .iddle ,arth

VR also helps patients recover from stro"e and otherin-uries Doctors are using VR to help reteach musclemovement such as !al"ing and gra((ing as !ell as smaller

physical movements such as pointing The doctors use themallea(le computeri8ed environments to increase ordecrease the motion needed to gra( or move an o(-ect

This also helps record e+actly ho! *uic"ly a patient islearning and recovering


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Disa&vanta(es

The hard!are needed to create a fully immersed VRe+perience is still cost prohi(itive The total cost of themachinery to create a VR system is still the same price as ane! car$ around $>>>

The technology for such an e+perience is still ne! ande+perimental VR is (ecoming much more commonplace (ut

programmers are still grappling !ith ho! to interact !ithvirtual environments

The idea of escapism is common place among those thatuse VR environments and people often live in the virtual!orld instead of dealing !ith the real one

This happens even in the lo! *uality and fairly hard to use

VR environments that are online right no! 9ne !orry is thatas VR environments (ecome much higher *uality andimmersive$ they !ill (ecome attractive to those !ishing toescape real life Another concern is VR training

Training !ith a VR environment does not have the sameconse*uences as training and !or"ing in the real !orld Thismeans that even if someone does !ell !ith simulated tas"s

in a VR environment$ that person might not do !ell in thereal !orld


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6urrent problems 5 (uture work

6ybersickness 7 simulator sickness 3ow-fidelity 2xpensive 3ack of integration between application packages

4igh-fidelity system 6ost-saving 6ollaborative

4igh-level contact between participants in distributed VR


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Conclusion

VR introduces a ne! !ay of interacting !ith computers The (est of VR is yet to come 7e( is very suita(le for VR applications$ (ut the proper

technology is not yet there


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References

Roof calculator#soft!are$calculates ? trac"s materials$ estimatesPut a roo0ng estimate together in under = minutes and get acomplete roof material list @

d Animation / Studios creating Virtual Reality Pictures/ D Animation company has a Computer 5raphics portfolio that

includes / Architectural Rendering$ / Product Visualisation$ DVirtual Tours

Aar"id d presentationsVirtual tours to highlight your products2 uni*ue features

CAD Drafting Services!!!dp#draftingservicescom speciali8es in cad drafting servicesand raster to vector &R=V' conversions for all types of HVAC$architectural$ mechanical and engineering pro-ects

CadCellscom # Cells and Custom /ser Interfaces 6or .icrostation ;$v and AutoCAD /sersProvides .icrostation cell li(raries for ; and v$ AutoCAD$ cadli(raries


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Than"s@@@@

elec virtual reality ppt

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