virtual reality barkha manral seminar on augmented reality.ppt

Reality Reinvented

Name :Barkha ManralEnroll Roll no. 110210116062Semester :5th

Department : Information Technology

Introduction Augmented reality

Augmented reality system Augmenting our world Example – Wikitude

Implementation Components of AR system

Head mounted display Video see through Optical see through

Tracking & orientation Global positioning system Differential GPS Digital compass

Mobile computing Augmented Reality Vs Virtual reality History Using Augmented reality Limitations Looking into future.. Conclusion references

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 augmented-reality system

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.

Wikitude –Wiki attitude

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.

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)

Generate data

Augment generated

data to user’s view

Here are the three components needed to make an augmented-reality system work :displaytracking systemmobile computing power

Head mounted view

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 augmented-reality systems

There are two basic types of HMDS:

video see-through optical see-through

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.

Tracking & Orientation

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 and heads.

1.Where the user is located?

2.Where he/she is looking?

Currently, the best tracking technology available for large open areas is the Global Positioning System.

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.

GPS Network

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 achieve centimeter-level accuracy.

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

Components Three magnetic sensors One tilt sensor

Wearable computersMobile 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, backpack etc).

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 system.

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 users.

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 world.”

Education

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].

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:

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 vision.

Augmented reality displayscould also highlight troopmovements, and give soldiersthe 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 problem.

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 pointing.

Enhanced media application ,like pseudo holographic virtual screens, virtual surround cinema.

Replacement of cell phones: eye dialing,

insertion of information directly into

environment.

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.

http://www.metalliccloud.com/rob/future_thinking/

http://en.wikipedia.org/wiki/Augmented_reality

http://www.howstuffworks.com/augmented-reality.htm

http://www.youtube.com/watch?v=tpaJBu4BEuA