Virtual Reality

Virtual Reality

By.Viral V. Patel

TOPICES•Definition•Introduction•History•Type of virtual reality•Technology•Steps to Developing Virtual reality•Application•Merit•Demerit•Summary

Define : Virtual Reality (VR), sometimes referred

to as”immersive multimedia”, Is a computersimulated environment that can simulate

physicalpresence in places in the non-physical

world orimagined world. Virtual reality can recreate

sensoryexperiences, which include virtual

taste, sight,smell, sound, and touch.

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.

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, you can explore any uncharted territory of the human imagination.

History of VR

•In mid 1950s visionary cinematographer Morton H Eilig built a single user console called Sensorama that included a stereoscopic display, fans, or emitters, stereo speakers and a moving chair. This enabled the user watch television in three dimensional ways.

Sensorama•3d•Wide vision•Motion•Colour•Stereo sound•Aromas•Wind •vibration

History of VR•In 1961, Philco Corporation engineers developed the first HMD known as

the Headsight. The helmet consisted of a video screen along with a tracking system. Then they linked to a closed circuit camera system.

History of VR•In 1965, a computer scientist named Ivan

Sutherland envisioned what he called the “Ultimate Display.” After using this display a person imagines the virtual world very similar to the real world.

Types of VR1. Window on World Systems (WoW)2. Video Mapping3. Immersive Systems4. Telepresence5. Mixed Reality

Window on World Systems (WoW)•Some systems use a conventional computer

monitor to display the visual world.•called Desktop VR or a Window on a World

(WoW).

Video Mapping•A variation of the WoW approach merges

a video input of the user's silhouette with a 2D computer graphic.

•The user watches a monitor that shows his body's interaction with the world.

Immersive Systems•The ultimate VR systems completely

immerse the user's personal viewpoint inside the virtual world.

• These "immersive" VR systems are often equipped with a

Head Mounted Display (HMD)

Telepresence•Telepresence is a variation on visualizing

complete computer generated worlds.•This a technology links remote sensors in

the real world with the senses of a human operator.

Mixed Reality•Merging the Telepresence and Virtual

Reality systems gives the Mixed Reality•or Seamless Simulation systems.

Technology(hardware)

•Virtual Sphere• Locomotion platform• A allows users

to be completely immersed into their interactive virtual experience

• Allowing them to walk through the virtual environment.


•Head mounted display• A helmet or a face mask providing the visual and

auditory displays.• Use LCD or CRT to display stereo images.• May include built-in head-tracker and stereo

headphones


•Data Gloves• Outfitted with sensors on the fingers as well as an

overall position/orientation tracking equipment.• Enables natural interaction with virtual objects by hand

gesture recognition.


•(BOOM)Binocular Omni-Orientation Monitor.

• It is a head-coupled stereoscopic display device.• Screens & optical system are housed in a box

that is attached to a multi-link arm.• The user looks into the box, sees the virtual

world, and can guide the box to any position.


•The CAVE (Cave Automatic Virtual Environment)

• provides the illusion of immersion by projecting stereo images on the walls and floor of a room-sized cube.

• A head tracking system continuously adjust the stereo projection to the current position of the leading viewer.

http://um3d.dc.umich.edu/hardware/CAVE/

Technology(software)

•VR Software exits in many forms and for many VR applications. These include: Three Dimensional Modelling

Software Two-Dimensional Graphics Software Digital Sound Editing Software Simulation Software


• Three Dimensional Modelling Software• Since virtual reality is a three-dimensional medium, all

the objects in a virtual world must be 3D. • The actual geometry of the objects must be specified

using 3D modelling software, and then imported into the virtual environment.

• Few examples of 3d software▫VRML- virtual reality modelling language▫X3D▫Java 3D▫AC3D▫Alice, etc


• Two-Dimensional Graphics Software• Since there is a limit to the geometric complexity of

the objects in a virtual world, it is often useful to be able to "paint" the surfaces of the objects with additional detail.

• This process is called texture mapping and requires two-dimensional graphics software often called "paint programs".

• A few examples of 2D graphics software:▫ Adobe Photoshop▫ Adobe Illustrator▫ Fractal Design Painter


• Digital Sound Editing Software• Sound is a very important, yet often neglected

aspect of virtual reality.• A virtual environment is low resolution, looks

like computer graphics, and is not likely to be mistaken for the real thing.

• Digital sound is nearly as high resolution as human hearing. Digital editing software allows you to cut, splice, mix, and loop the sounds of your virtual environment.


• Simulation Software• Virtual Reality requires sophisticated software in order to provide a

compelling experience.• Software must be able to process the inputs coming from trackers and

input devices, and then update the displays each second. • The software creates and maintains an internal database of all the

objects in the virtual world, continually monitors changes to the database, and distributes this information to all the computers participating in the virtual world.

• Examples of VR Simulation Software:Sense-8DivisionSuperscapeCosmoVRML

Ten Steps to Developing Virtual Reality ApplicationsStep 0: Plan for the future; Never

underestimate how fast technology will change

during your development process.Step 1: Understand the strengths and

weakness of educational VR. Step 2: Identify the intended audience and

the end users probable equipment.Step 3: Identify an application that is

suitable for VR.

Ten Steps to Developing Virtual Reality ApplicationsStep 4: Choose an appropriate development platform (computer hardware & software)Step 5: Consider carefully the trade-offs of simulation realism versus performance, and plan out the simulation carefully.Step 6: Start with a simple framework, and then gradually add details.Step 7: Provide for student evaluation early and often; Develop the simulation based upon

user feedback.

Ten Steps to Developing Virtual Reality ApplicationsStep 8: Prepare instructions suitable for

students, faculty, and systems

administrators. Step 9: Incorporate the simulation into the curriculum. Step 10:Share your results far and wide.

Where is virtual reality used

•MILITARYFlight simulators.Ship simulators.Tank simulators.

Where is virtual reality used•HEALTHCARE

Practice performing surgery.Perform surgery on a remote patient.Teach new skills in a safe, controlled environment

Where is virtual reality used•ENTERTAINMENT

More vividMove excitingMore attractive

Where is virtual reality used•EDUCATION

Better learningBetter understandingFun and education

MERIT•Using 3D and virtual reality environments

as part of your training methodology allows your students or workforce to experience an entirely new side of training.

•Theory and practical•Real-life situations•Save on cost•Complex situations made easy•A safe environment

DEMERIT•Costly •Problematic to use•Repair or maintain•Cause a lack of understanding of the

effects of some actions when performed outside the virtual environment.

ABSTRACT Visualization of complicated, large data is helpful

for understanding and analysis. VR offers us a new way to interact with

computer. VR enables us to experience the virtual world

that is impossible in real world. VR is changing our life, eventually VR will

increasingly become a part of our life.

THANK YOU

Virtual Reality

Devices & Hardware

Transcript of Virtual Reality