augmented reality (access virtual world)

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Augmented Reality (AR) Chirag Thakkar (MCA-1 ST SEM- 41)

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Page 1: Augmented reality (Access virtual world)

Augmented Reality (AR)Chirag Thakkar (MCA-1ST SEM-41)

Page 2: Augmented reality (Access virtual world)

INDEX

• WHAT IS AUGMENTED REALITY?• AUGMENTED REALITY VS. VIRTUAL REALITY• MILGRAM’S REALITY-VIRTUALITY CONTINUUM• COMBINING THE REAL AND VIRTUAL WORLDS• REALISTIC MERGING• FAILURES IN REGISTRATION• DISPLAY TECHNOLOGIES• USES OF AUGMENTED REALITY

Page 3: Augmented reality (Access virtual world)

WHAT IS AUGMENTED REALITY?

• A combination of a real scene viewed by a user and a virtual scene generated by a computer that augments the scene with additional information.• ARToolkit demo movie• T-immersion 2004 video

Page 4: Augmented reality (Access virtual world)

J.A.R.V.I.S. CONCEPT OF AR

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AUGMENTED REALITY VS. VIRTUAL REALITY

Augmented Reality• System augments the

real world scene• User maintains a sense

of presence in real world• Needs a mechanism to

combine virtual and real worlds

• Hard to register real and virtual

Virtual Reality• Totally immersive

environment• Senses are under control

of system• Need a mechanism to

feed virtual world to user

• Hard to make VR world interesting

Page 6: Augmented reality (Access virtual world)

MILGRAM’S REALITY-VIRTUALITY CONTINUUM

Mixed Reality (MR)

Real Environment

Virtual Environment

Augmented Reality (AR)

Augmented Virtuality (AV)

Milgram coined the term “Augmented Virtuality ” to identify systems which are mostly synthetic with some real world imagery added such as texture mapping video onto virtual objects.

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COMBINING THE REAL AND VIRTUAL WORLDS

We need:• Precise models• Locations and optical properties of the viewer (or camera)

and the display• Calibration of all devices• To combine all local coordinate systems centered on the

devices and the objects in the scene in a global coordinate system

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Con..

• Register models of all 3D objects of interest with their counterparts in the scene• Track the objects over time when the user moves and

interacts with the scene

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REALISTIC MERGING

Requires:• Objects to behave in physically plausible manners

when manipulated• Occlusion• Collision detection• Shadows

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FAILURES IN REGISTRATION

Failures in registration due to:• Noise• Position and pose of camera with respect to the real

scene• Image distortions• Time delays• In calculating the camera position

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DISPLAY TECHNOLOGIES

• Monitor Based• Laptops• Cell phones• Projectors (more Ubiquitous Computing)

• Head Mounted Displays:• Video see-through• Optical see-through

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MONITOR BASED AUGMENTED REALITY

• Simplest available• Treat laptop/PDA/cell phone as a window through

which you can see AR world.• Sunglasses demo

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MONITOR BASED AR

• Successful commercialization• Yellow line in football broadcasts• Glowing hockey puck• Baseball cards• Ad campaigns

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OPTICAL SEE-THROUGH HMD

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VIDEO SEE-THROUGH HMD

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USES OF AUGMENTED REALITY

•Interactive in real-time • Real time processing• Data can be generated in real time

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Con..

•Registered in three dimensions • Imagery is in 3D• Graphics and Models are created by

Designers

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Con..

• Video Games• Physical interactions with 3D models

• Presentations• Can now be more interactive

• Television• You will be able to watch TV in 3D any where

• Theme Park• Rides can now be even more realistic

• Simulations• Driving, Flying, Etc…

Page 19: Augmented reality (Access virtual world)

THANK YOU