Augmented reality (Access virtual world)

Augmented reality (Access virtual world)

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  Augmented Reality (AR) Chirag Thakkar(MCA-1ST SEM-41)
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  INDEX • WHAT ISAUGMENTED 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
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  WHAT IS AUGMENTEDREALITY? • 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
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  J.A.R.V.I.S. CONCEPT OFAR
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  AUGMENTED REALITY VS. VIRTUALREALITY 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
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  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 REALAND 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 modelsof 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: • Objectsto behave in physically plausible manners when manipulated • Occlusion • Collision detection • Shadows
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  FAILURES IN REGISTRATION Failuresin 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 • MonitorBased • 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 AUGMENTEDREALITY •Interactive in real-time •Real time processing •Data can be generated in real time
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  Con.. •Registered in threedimensions •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…
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  THANK YOU