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Augmented Reality

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Lakshmi Ramesh

on 5 April 2014

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Transcript of Augmented Reality

Augmented Reality
Lakshmi Ramesh

What is augmented reality?
A range of technologies can be used for augmented realities. Some of them are :
Applications Of AR
Medical Applications
Technologies like GPS do not work very well indoors.

mobile phones are already platforms that are limited greatly by screen size, battery life and processing power.
People may not want to overload their cellular phones with this technology.

There are various privacy concerns involved.

Lastly, all the illustration and instruction based applications of augmented reality ultimately increase your interaction with a machine rather than a human being.
Augmented Reality (AR) is defined as a real-time direct or indirect view of a physical realworld
environment that has been enhanced / augmented by adding virtual computer generated
information to it.
What is the difference between AR and VR?
AR enhances the user’s perception of and
interaction with the real world. While Virtual Reality (VR) technology completely immerses users in a synthetic world without seeing the real world, AR technology augments the sense of reality by
superimposing virtual objects and cues upon the real world in real time.
Visual Displays
Head Mounted
Monitor Based
Optical See Through
Video See Through
Optical see through HMD's work by placing optical Combiners in front of the users eyes. These combiners are partially transmissive, so that the user can look directly through them to see the real world. The combiners are also partially reflective, so that the user sees virtual images bounced off the combiners from head mounted monitors.
Video see through HMD's work by combining an HMD with one or two head mounted video cameras.The video cameras provide the user's view of the real world. These videos are combined with computer generated graphics and the result is displayed on the monitor in front of the user's eyes in the HMD.
One or two video cameras view the environment. Video of the real world and the graphic images generated by a scene generator are combined, just as in the video see-through HMD case and displayed in a monitor in front of the user. User does not wear the display device.
Tracking Sensors
An AR system must be able to sense the environment and track the users movement preferably with six degrees of freedom.
Modeling Environment
User Movement Tracking
Both tracking and registration techniques rely on environmental models, often-3D geometrical models. To annotate for instance windows, entrances, or rooms, an AR system needs to know where they are located with regard to the user’s current position and field of view.
Tracking devices consists of digital cameras and/or other optical sensors, GPS etc.. Registration accuracy depends not only on the geometrical model but also on the distance of the objects to be annotated.
Tracking is usually easier in indoor settings than in outdoor settings as the tracking devices do not have to be completely mobile and wearable or deal with shock, abuse, weather, etc. Instead the indoor environment is easily modeled and prepared, and conditions such as lighting and temperature may be controlled.GPS system, although lacking in precision, provide an easy tracking system for outdoor systems that allows for better estimating the position of the user and its orientation once coupled with some sensors.

AR interfaces
One of the most important aspects of augmented reality is to create appropriate techniques
for interaction between the user and the virtual content of AR applications.
Tangible AR interfaces
Collaborative AR interfaces
Hybrid AR interfaces
Multimodal AR interfaces
Tangible interfaces support direct interaction with the real world
by exploiting the use of real, physical objects and tools. Physical Controllers are used for moving the virtual content.Devices like the mouse are tangible and unidirectional, they communicate from the user to the AR system only. Common 3D equivalents are tangible user interfaces (TUIs) like paddles and wands.

eg : Vomar Application which enables a person to select and rearrange the furniture in an AR living room design application by using a real, physical paddle. Paddle motions are mapped to intuitive gesture based commands, such as“scooping up” an object to select it for movement or hitting an item to make it disappear in
order to provide the user with an intuitive experience.
Collaborative AR interfaces include the use of multiple displays to support remote and collocated
activities.In remote sharing, AR is able to effortlessly integrate multiple devices with
multiple locations to enhance teleconferences.
It involves multiple users who may communicate face to face or maybe present at multiple locations.
Hybrid interfaces are used in those situations when one cannot predict the environment he/she will be working in. They provide
a flexible platform for unplanned, everyday interaction where it is not known in advance which type of interaction display or devices will be used.
Multimodal interfaces combine real objects input with naturally occurring forms of language and behaviors such as speech, touch, natural hand gestures, or gaze. These types of interfaces are more recently emerging. Examples include MIT’s sixth sense wearable gestural interface, called WUW. WUW brings the user with information projected onto surfaces, walls, and physical objects through natural hand gestures, arms movement, and/or interaction with the object itself.
Manufacture and Repair
Advertising and commercial
AR Mobile Applications
Medical Applications of
Augmented Reality are all such that they would be most helpful in the case of non invasive or minimally invasive surgeries. Using Magnetic Resonance Imaging (MRI) or Computer Tomography scans (CT) or ultrasound imaging, the internal structure can be viewed and this can be projected on the top of the human body. This would make it exceedingly simpler to perform minimally invasive surgeries. Also used to give step wise instruction
on how to perform surgery
Instructions of any type would be much easier to follow if they are present in the form of 3 dimensional applications rather than in the form of manuals with pictures and illustrations. This is where augmented reality comes into picture with respect to manufacturing and repair.
eg : BMW’s Augmented Reality Glasses which help a person in car repairs.
Marketers use AR to market their products online. The only device the user needs is a webcam.For example, in December 2008, MINI , the famous car company, ran an augmented reality advertisement in several German automotive magazines . The reader simply had to go to the MINI’s website
show the ad in front of their webcam, and a 3-D MINI appeared on their screen
Magic Mirror and Cisco's retail fitting room are two Applications that use AR to improver a users shopping experience. The eliminate the need of actually trying on the product. The customer stands in front of a screen and selects the item he/she wants to try. The screen displays an AR image of the customer wearing the product be it shoes,clothes,watches etc.
There has been a tremendous boom in the growth of AR mobile apps over the past few years.These apps cover all the areas from games, sports,cars,travel and education to technology in engineering and medicine and more. These apps basically work by capturing an image through the camera of the phone and then adding the virtual content to that image and displaying the result to the users.
A few Mobile Apps
Available on ios,blackberry,android. which is a GPS- like application that allows the user to keep his/her eyes on the road while glancing at the GPS

Augmented reality browser is an amazing 3D navigator to help you reach your location easily. Hold your smartphone upright and look around with your camera to view restaurants, hotels, landmarks, cinemas and others.
Think you go for a trip where you come across new places, landmarks and other things which you want to explore and find the details behind them. Instead of flipping your brochure pages, launch Tagwhat app and with the camera and GPS, it pulls out all the details from the web and social networks about any landmark you encounter.
Augment gets you to visualize 3D objects like furniture, books, characters in your desired rooms, halls and other places with the camera. Try new settings in your room without actually rearranging them.

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.
With the technology, users will be able to feel bumps and ridges, and also figure out which areas are rougher than others.
Image-recognition software coupled with AR will, quite soon, allow us to point our phones at people, even strangers, and instantly see information from their Facebook, Twitter, Amazon, LinkedIn or other online profiles
Augmented Reality in contact lenses.
[1]Julie Carmigniani & Borko Furht & Marco Anisetti &
Paolo Ceravolo & Ernesto Damiani & Misa Ivkovic (14 December 2010 ). Augmented reality technologies, systems and applications.Springer Science+Business Media, LLC 2010
[2] Trupti Lotlikar#1 Divya Mahajan Javid Khan Ritvik Ranadive Soumya Sharma. AUGMENTED REALITY
[3] Deep Know How : http://deepknowhow.com/2013/04/04/top-20-augmented-reality-apps-for-android-and-iphoneipad-users/

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