Augmented reality

Samsung SARI AR SDK markerless tracker used in the AR EdiBear game (Android OS)
Virtual Fixtures - first A.R. system 1992, U.S. Air Force, WPAFB
NASA X-38 display showing video map overlays including runways and obstacles during flight test in 2000.

Augmented reality (AR) is a live direct or indirect view of a physical, real-world environment whose elements are "augmented" by computer-generated sensory input such as sound, video, graphics or GPS data. It is related to a more general concept called computer-mediated reality, in which a view of reality is modified (possibly even diminished rather than augmented) by a computer. Augmented reality enhances one’s current perception of reality, whereas in contrast, virtual reality replaces the real world with a simulated one.[1][2] Augmentation techniques are typically performed in real time and in semantic context with environmental elements, such as overlaying supplemental information like scores over a live video feed of a sporting event.

With the help of advanced AR technology (e.g. adding computer vision and object recognition) the information about the surrounding real world of the user becomes interactive and digitally manipulable. Information about the environment and its objects is overlaid on the real world. This information can be virtual[3][4][5][6][7][8] or real, e.g. seeing other real sensed or measured information such as electromagnetic radio waves overlaid in exact alignment with where they actually are in space.[9][10] Augmented reality brings out the components of the digital world into a person's perceived real world. One example is an AR Helmet for construction workers which display information about the construction sites. The first functional AR systems that provided immersive mixed reality experiences for users were invented in the early 1990s, starting with the Virtual Fixtures system developed at the U.S. Air Force's Armstrong Labs in 1992.[11][12][13] Augmented Reality is also transforming the world of education, where content may be accessed by scanning or viewing an image with a mobile device. [14]

Technology

Hardware

Hardware components for augmented reality are: processor, display, sensors and input devices. Modern mobile computing devices like smartphones and tablet computers contain these elements which often include a camera and MEMS sensors such as accelerometer, GPS, and solid state compass, making them suitable AR platforms.[15]

Display

Various technologies are used in Augmented Reality rendering including optical projection systems, monitors, hand held devices, and display systems worn on the human body.

A head-mounted display (HMD) is a display device paired to the forehead such as a harness or helmet. HMDs place images of both the physical world and virtual objects over the user's field of view. Modern HMDs often employ sensors for six degrees of freedom monitoring that allow the system to align virtual information to the physical world and adjust accordingly with the user's head movements.[16][17][18] HMDs can provide VR users mobile and collaborative experiences.[19] Specific providers, such as uSens and Gestigon, are even including gesture controls for full virtual immersion.[20][21]

In January 2015, Meta launched a project led by Horizons Ventures, Tim Draper, Alexis Ohanian, BOE Optoelectronics and Garry Tan.[22][23][24] On February 17, 2016, Meta announced their second-generation product at TED, Meta 2. The Meta 2 head-mounted display headset uses a sensory array for hand interactions and positional tracking, visual field view of 90 degrees (diagonal), and resolution display of 2560 x 1440 (20 pixels per degree), which is considered the largest field of view (FOV) currently available.[25][26][27][28]

Eyeglasses
Vuzix AR3000 AugmentedReality SmartGlasses

AR displays can be rendered on devices resembling eyeglasses. Versions include eyewear that employs cameras to intercept the real world view and re-display its augmented view through the eye pieces[29] and devices in which the AR imagery is projected through or reflected off the surfaces of the eyewear lens pieces.[30][31][32]

HUD
Headset computer

A head-up display, also known as a HUD, is a transparent display that presents data without requiring users to look away from their usual viewpoints. A precursor technology to augmented reality, heads-up displays were first developed for pilots in the 1950s, projecting simple flight data into their line of sight thereby enabling them to keep their "heads up" and not look down at the instruments. Near eye augmented reality devices can be used as portable head-up displays as they can show data, information, and images while the user views the real world. Many definitions of augmented reality only define it as overlaying the information.[33][34] This is basically what a head-up display does; however, practically speaking, augmented reality is expected to include registration and tracking between the superimposed perceptions, sensations, information, data, and images and some portion of the real world.[35]

CrowdOptic, an existing app for smartphones, applies algorithms and triangulation techniques to photo metadata including GPS position, compass heading, and a time stamp to arrive at a relative significance value for photo objects.[36] CrowdOptic technology can be used by Google Glass users to learn where to look at a given point in time.[37]

A number of smartglasses have been launched for augmented reality. Due to encumbered control, smartglasses are primarily designed for micro-interaction like reading a text message but still far from the well-rounded applications for augmented reality. [38] In January 2015, Microsoft introduced HoloLens, which is an independent smartglasses unit. Brian Blau, Research Director of Consumer Technology and Markets at Gartner, said that "Out of all the head-mounted displays that I've tried in the past couple of decades, the HoloLens was the best in its class.".[39] First impressions and opinions have been generally that HoloLens is a superior device to the Google Glass, and manages to do several things "right" in which Glass failed.[39][40]

Contact lenses

Contact lenses that display AR imaging are in development. These bionic contact lenses might contain the elements for display embedded into the lens including integrated circuitry, LEDs and an antenna for wireless communication. The first contact lens display was reported in 1999[41] and subsequently, 11 years later in 2010/2011[42][43][44][45] Another version of contact lenses, in development for the U.S. Military, is designed to function with AR spectacles, allowing soldiers to focus on close-to-the-eye AR images on the spectacles and distant real world objects at the same time.[46][47] The futuristic short film Sight features contact lens-like augmented reality devices.[48][49]

Virtual retinal display

A virtual retinal display (VRD) is a personal display device under development at the University of Washington's Human Interface Technology Laboratory. With this technology, a display is scanned directly onto the retina of a viewer's eye. The viewer sees what appears to be a conventional display floating in space in front of them.[50]

EyeTap

The EyeTap (also known as Generation-2 Glass[51]) captures rays of light that would otherwise pass through the center of a lens of an eye of the wearer, and substitutes synthetic computer-controlled light for each ray of real light. The Generation-4 Glass[51] (Laser EyeTap) is similar to the VRD (i.e. it uses a computer-controlled laser light source) except that it also has infinite depth of focus and causes the eye itself to, in effect, function as both a camera and a display, by way of exact alignment with the eye, and resynthesis (in laser light) of rays of light entering the eye.[52]

Handheld

Handheld displays employ a small display that fits in a user's hand. All handheld AR solutions to date opt for video see-through. Initially handheld AR employed fiducial markers,[53] and later GPS units and MEMS sensors such as digital compasses and six degrees of freedom accelerometer–gyroscope. Today SLAM markerless trackers such as PTAM are starting to come into use. Handheld display AR promises to be the first commercial success for AR technologies. The two main advantages of handheld AR is the portable nature of handheld devices and ubiquitous nature of camera phones. The disadvantages are the physical constraints of the user having to hold the handheld device out in front of them at all times as well as distorting effect of classically wide-angled mobile phone cameras when compared to the real world as viewed through the eye.[54] Such examples as Pokémon Go and Ingress utilize an Image Linked Map (ILM) interface, where approved geotagged locations appear on a stylized map for the user to interact with.[55]

Spatial

Spatial Augmented Reality (SAR) augments real-world objects and scenes without the use of special displays such as monitors, head mounted displays or hand-held devices. SAR makes use of digital projectors to display graphical information onto physical objects. The key difference in SAR is that the display is separated from the users of the system. Because the displays are not associated with each user, SAR scales naturally up to groups of users, thus allowing for collocated collaboration between users.

Examples include shader lamps, mobile projectors, virtual tables, and smart projectors. Shader lamps mimic and augment reality by projecting imagery onto neutral objects, providing the opportunity to enhance the object’s appearance with materials of a simple unit- a projector, camera, and sensor.

Other applications include table and wall projections. One innovation, the Extended Virtual Table, separates the virtual from the real by including beam-splitter mirrors attached to the ceiling at an adjustable angle.[56] Virtual showcases, which employ beam-splitter mirrors together with multiple graphics displays, provide an interactive means of simultaneously engaging with the virtual and the real. Many more implementations and configurations make spatial augmented reality display an increasingly attractive interactive alternative.

An SAR system can display on any number of surfaces of an indoor setting at once. SAR supports both a graphical visualization and passive haptic sensation for the end users. Users are able to touch physical objects in a process that provides passive haptic sensation.[6][57][58][59]

Tracking

Modern mobile augmented-reality systems use one or more of the following tracking technologies: digital cameras and/or other optical sensors, accelerometers, GPS, gyroscopes, solid state compasses, RFID and wireless sensors. These technologies offer varying levels of accuracy and precision. Most important is the position and orientation of the user's head. Tracking the user's hand(s) or a handheld input device can provide a 6DOF interaction technique.[60][61]

Networking

Mobile augmented reality applications are gaining popularity due to the wide adoption of mobile and especially wearable devices. However, they often rely on computationally intensive computer vision algorithms with extreme latency requirements. To compensate for the lack of computing power, offloading data processing to a distant machine is often desired. Computation Offloading introduces new constraints in applications, especially in terms of latency and bandwidth. Although there are a plethora of real-time multimedia transport protocols there is a need for support from network infrastructure as well.[62]

Input devices

Techniques include speech recognition systems that translate a user's spoken words into computer instructions and gesture recognition systems that can interpret a user's body movements by visual detection or from sensors embedded in a peripheral device such as a wand, stylus, pointer, glove or other body wear.[63][64][65][66] Some of the products which are trying to serve as a controller of AR Headsets include Wave by Seebright Inc. and Nimble by Intugine Technologies.

Computer

The computer analyzes the sensed visual and other data to synthesize and position augmentations.

Software and algorithms

A key measure of AR systems is how realistically they integrate augmentations with the real world. The software must derive real world coordinates, independent from the camera, from camera images. That process is called image registration which uses different methods of computer vision, mostly related to video tracking.[67][68] Many computer vision methods of augmented reality are inherited from visual odometry.

Usually those methods consist of two parts. The first stage is to detect interest points, fiducial markers or optical flow in the camera images. This step can use feature detection methods like corner detection, blob detection, edge detection or thresholding and/or other image processing methods.[69][70] The second stage restores a real world coordinate system from the data obtained in the first stage. Some methods assume objects with known geometry (or fiducial markers) are present in the scene. In some of those cases the scene 3D structure should be precalculated beforehand. If part of the scene is unknown simultaneous localization and mapping (SLAM) can map relative positions. If no information about scene geometry is available, structure from motion methods like bundle adjustment are used. Mathematical methods used in the second stage include projective (epipolar) geometry, geometric algebra, rotation representation with exponential map, kalman and particle filters, nonlinear optimization, robust statistics.

Augmented Reality Markup Language (ARML) is a data standard developed within the Open Geospatial Consortium (OGC),[71] which consists of XML grammar to describe the location and appearance of virtual objects in the scene, as well as ECMAScript bindings to allow dynamic access to properties of virtual objects.

To enable rapid development of Augmented Reality Applications, some software development kits (SDKs) have emerged.[72][73] A few SDKs such as CloudRidAR[74] leverage cloud computing for performance improvement. Some of the well known AR SDKs are offered by Vuforia,[75] ARToolKit, Catchoom CraftAR[76] Mobinett AR,[77] Wikitude,[78] Blippar[79] Layar,[80] Meta.[81][82] and ARLab[83]

Applications

Augmented reality has many applications. First used for military, industrial, and medical applications, by 2012 its use expanded into entertainment and other commercial industries.[84] By 2016, powerful mobile devices allowed AR to become a useful learning aid even in primary schools.

Since the 1970s and early 1980s, Steve Mann has developed technologies meant for everyday use i.e. "horizontal" across all applications rather than a specific "vertical" market. Examples include Mann's "EyeTap Digital Eye Glass", a general-purpose seeing aid that does dynamic-range management (HDR vision) and overlays, underlays, simultaneous augmentation and diminishment (e.g. diminishing the electric arc while looking at a welding torch).[85]

Literature

An example of an AR code containing a QR code.

The first description of AR as we know it today was in Virtual Light, the 1994 novel by William Gibson. In 2011, AR was blended with poetry by ni ka from Sekai Camera in Japan, Tokyo. The prose of these AR poems come from Paul Celan, "Die Niemandsrose", expressing the mourning of "3.11," March 2011 Tōhoku earthquake and tsunami.[86][87][88][89]

Archaeology

AR was applied to aid archaeological research. By augmenting archaeological features onto the modern landscape, AR allowed archaeologists to formulate possible site configurations from extant structures.[90]

Computer generated models of ruins, buildings, landscapes or even ancient people have been recycled into early archaeological AR applications.[91][92][93]

Architecture

AR can aid in visualizing building projects. Computer-generated images of a structure can be superimposed into a real life local view of a property before the physical building is constructed there; this was demonstrated publicly by Trimble Navigation in 2004. AR can also be employed within an architect's workspace, rendering into their view animated 3D visualizations of their 2D drawings. Architecture sight-seeing can be enhanced with AR applications allowing users viewing a building's exterior to virtually see through its walls, viewing its interior objects and layout.[94][95][96]

With the continual improvements to GPS accuracy, businesses are able to use augmented reality to visualize georeferenced models of construction sites, underground structures, cables and pipes using mobile devices.[97] Augmented reality is applied to present new projects, to solve on-site construction challenges, and to enhance promotional materials.[98] Examples include the Daqri Smart Helmet, an Android-powered hard hat used to create augmented reality for the industrial worker, including visual instructions, real time alerts, and 3D mapping.[99]

Following the Christchurch earthquake, the University of Canterbury released CityViewAR, which enabled city planners and engineers to visualize buildings that had been destroyed.[100] Not only did this provide planners with tools to reference the previous cityscape, but it also served as a reminder to the magnitude of the devastation caused, as entire buildings had been demolished.

Visual art

AR applied in the visual arts allows objects or places to trigger artistic multidimensional experiences and interpretations of reality.

AR technology aided the development of eye tracking technology to translate a disabled person's eye movements into drawings on a screen.[101]

By 2011, augmenting people, objects, and landscapes had become a recognized art style. For example, in 2011, artist Amir Bardaran's work, "Frenchising the Mona Lisa" overlaid video on Da Vinci's painting using an AR mobile application called Junaio.[102] The AR app allowed the user to train his or her smartphone on Da Vinci's Mona Lisa and watch the lady loosen her hair and wrap a French flag around her visage in the form an Islamic hijab. The wearing of a hijab was controversial in France at the time.[103]

Commerce

The AR-Icon can be used as a marker on print as well as on online media. It signals the viewer that digital content is behind it. The content can be viewed with a smartphone or tablet.

AR is used to integrate print and video marketing. Printed marketing material can be designed with certain "trigger" images that, when scanned by an AR-enabled device using image recognition, activate a video version of the promotional material. A major difference between Augmented Reality and straight forward image recognition is that you can overlay multiple media at the same time in the view screen, such as social media share buttons, the in-page video even audio and 3D objects. Traditional print-only publications are using Augmented Reality to connect many different types of media.[104][105][106][107][108]

AR can enhance product previews such as allowing a customer to view what's inside a product's packaging without opening it.[109] AR can also be used as an aid in selecting products from a catalog or through a kiosk. Scanned images of products can activate views of additional content such as customization options and additional images of the product in its use.[110][111]

By 2010, Virtual dressing rooms were developed for e-commerce.[112]

Augment SDK
Augment SDK offers brands and retailers the capability to personalize their customer’s shopping experience by embedding AR product visualization into their eCommerce platforms.

In 2012, a mint used AR techniques to market a commemorative coin for Aruba. Using the coin itself as an AR trigger, when held in front of an AR-enabled device it revealed additional objects and layers of information that were not visible without the device.[113][114]

In 2013, L'Oreal used CrowdOptic technology to create an augmented reality experience at the seventh annual Luminato Festival in Toronto, Canada.[37]

In 2014, L'Oreal Paris brought the AR experience to a personal level with their "Makeup Genius" app. It allowed users to try out make-up and beauty styles utilizing a mobile device.[115]

In 2015, the Bulgarian startup iGreet developed its own AR technology and used it to make the first premade “live” greeting card. A traditional paper card was augmented with digital content which is revealed by using the iGreet app.[116][117]

In late 2015, the Luxembourg startup itondo.com launched an AR app for the art market that lets art buyers accurately visualize 2D artworks to scale on their own walls to scale before they buy. The app has two AR-enabled functionalities: 1. Live Preview for viewing to scale as the user moves around their room; 2. Backgrounds Preview where the user previews artwork to scale on their pre-saved wall photos. The app allows for searching of the entire marketplace catalog or their saved Favorites while in AR mode, so the user can jump between artworks without having to return to the Home screen. Virtually installed works can be photographed and then shared through native channels.

Education

App iWow,[118] a mobile device-based augmented reality enhanced world globe

In educational settings, AR has been used to complement a standard curriculum. Text, graphics, video, and audio were superimposed into a student’s real time environment. Textbooks, flashcards and other educational reading material contained embedded “markers” or triggers that, when scanned by an AR device, produced supplementary information to the student rendered in a multimedia format.[119][120][121]

As AR evolved students could participate interactively. Computer-generated simulations of historical events, exploring and learning details of each significant area of the event site could come alive.[122] On higher education, there are some applications that can be used. Construct3D, a Studierstube system, allowed students to learn mechanical engineering concepts, math or geometry.[123] Chemistry AR apps allowed students to visualize and interact with the spatial structure of a molecule using a marker object held in a hand.[124] Anatomy students could visualize different systems of the human body in three dimensions.[125]

Augmented reality technology enhanced remote collaboration, allowing students and instructors in different locales to interact by sharing a common virtual learning environment populated by virtual objects and learning materials.[126]

Primary school children learn easily from interactive experiences. For instance, astronomical constellations and the movements of objects in the solar system were orient in 3D and overlaid in the direction the device was held and expanded with supplemental video information. Paper-based science book illustrations could seem to come alive as video without requiring the child to navigate to web-based materials.
For teaching anatomy, teachers could use devices to superimpose hidden anatomical structures like bones and organs on any person in the classroom.

While some educational apps are available for AR in 2016, it is not broadly used. Apps that leverage augmented reality to aid learning, included SkyView for studying astronomy,[127] AR Circuits for building simple electric circuits[128] and SketchAr for drawing.[129]

Emergency management/search and rescue

Augmented reality systems are used in public safety situations – from super storms to suspects at large.

As early as 2009, two articles from Emergency Management magazine discussed the power of the technology for emergency management. The first was "Augmented Reality--Emerging Technology for Emergency Management" by Gerald Baron.[130] Per Adam Crowe: "Technologies like augmented reality (ex: Google Glass) and the growing expectation of the public will continue to force professional emergency managers to radically shift when, where, and how technology is deployed before, during, and after disasters."[131]

Another early example was a search aircraft is looking for a lost hiker in rugged mountain terrain. Augmented reality systems provided aerial camera operators with a geographic awareness of forest road names and locations blended with the camera video. As a result, the camera operator was better able to search for the hiker knowing the geographic context of the camera image. Once located, the operator could more efficiently direct rescuers to the hiker's location because the geographic position and reference landmarks were clearly labeled.[132]

Video games

Merchlar's mobile game Get On Target uses a trigger image as fiducial marker

The gaming industry embraced AR technology. A number of games were developed for prepared indoor environments, such as AR air hockey, Titans of Space, collaborative combat against virtual enemies, and AR-enhanced pool table games.[133][134][135]

Augmented reality allowed video game players to experience digital game play in a real world environment. Companies and platforms like Niantic and LyteShot emerged as major augmented reality gaming creators.[136][137] Niantic is notable for releasing the record-breaking Pokémon Go game.[138]

Industrial design

AR allowed industrial designers to experience a product's design and operation before completion. Volkswagen used AR for comparing calculated and actual crash test imagery.[139] AR was used to visualize and modify car body structure and engine layout. AR was also used to compare digital mock-ups with physical mock-ups for finding discrepancies between them.[140][141]

Medical

Since 2005, a device that films subcutaneous veins, processes and projects the image of the veins onto the skin has been used to locate veins. This device is called a near-infrared vein finder.[142][143]

AR provided surgeons with patient monitoring data in the style of a fighter pilot's heads up display or allowed patient imaging records, including functional videos, to be accessed and overlaid. Examples include a virtual X-ray view based on prior tomography or on real time images from ultrasound and confocal microscopy probes,[144] visualizing the position of a tumor in the video of an endoscope,[145] or radiation exposure risks from X-ray imaging devices.[146][147] AR can enhance viewing a fetus inside a mother's womb.[148] Siemens, Karl Storz and IRCAD have developed a system for laparoscopic liver surgery that uses AR to view sub-surface tumors and vessels.[149] AR has been used for cockroach phobia treatment.[150] Patients wearing augmented reality glasses can be reminded to take medications.[151]

Spatial immersion and interaction

Augmented reality applications, running on handheld devices utilized as virtual reality headsets, can also digitalize human presence in space and provide a computer generated model of them, in a virtual space where they can interact and perform various actions. Such capabilities are demonstrated by "Project Anywhere" developed by a postgraduate student at ETH Zurich, which was dubbed as an "out-of-body experience".[152][153][154]

Flight Training

Building on decades of perceptual-motor research in experimental psychology, researchers at the Aviation Research Laboratory of the University of Illinois at Urbana-Champaign used augmented reality in the form of a flight path in the sky to teach flight students how to land a flight simulator. An adaptive augmented schedule in which students were shown the augmentation only when they departed from the flight path proved to be a more effective training intervention than a constant schedule[155][156]. Flight students taught to land in the simulator with the adaptive augmentation learned to land a light aircraft more quickly than students with the same amount of landing training in the simulator but with constant augmentation or without any augmentation[155].

Military

An interesting early application of AR occurred when Rockwell International created video map overlays of satellite and orbital debris tracks to aid in space observations at Air Force Maui Optical System. In their 1993 paper "Debris Correlation Using the Rockwell WorldView System" the authors describe the use of map overlays applied to video from space surveillance telescopes. The map overlays indicated the trajectories of various objects in geographic coordinates. This allowed telescope operators to identify satellites, and also to identify – and catalog – potentially dangerous space debris.[157]

Starting in 2003 the US Army integrated the SmartCam3D augmented reality system into the Shadow Unmanned Aerial System to aid sensor operators using telescopic cameras to locate people or points of interest. The system combined both fixed geographic information including street names, points of interest, airports, and railroads with live video from the camera system. The system offered "picture in picture" mode that allows the system to show a synthetic view of the area surrounding the camera's field of view. This helps solve a problem in which the field of view is so narrow that it excludes important context, as if "looking through a soda straw". The system displays real-time friend/foe/neutral location markers blended with live video, providing the operator with improved situational awareness.

Researchers at USAF Research Lab (Calhoun, Draper et al.) found an approximately two-fold increase in the speed at which UAV sensor operators found points of interest using this technology.[158] This ability to maintain geographic awareness quantitatively enhances mission efficiency. The system is in use on the US Army RQ-7 Shadow and the MQ-1C Gray Eagle Unmanned Aerial Systems.

In combat, AR can serve as a networked communication system that renders useful battlefield data onto a soldier's goggles in real time. From the soldier's viewpoint, people and various objects can be marked with special indicators to warn of potential dangers. Virtual maps and 360° view camera imaging can also be rendered to aid a soldier's navigation and battlefield perspective, and this can be transmitted to military leaders at a remote command center.[159]

LandForm video map overlay marking runways, road, and buildings during 1999 helicopter flight test

The NASA X-38 was flown using a Hybrid Synthetic Vision system that overlaid map data on video to provide enhanced navigation for the spacecraft during flight tests from 1998 to 2002. It used the LandForm software and was useful for times of limited visibility, including an instance when the video camera window frosted over leaving astronauts to rely on the map overlays.[160] The LandForm software was also test flown at the Army Yuma Proving Ground in 1999. In the photo at right one can see the map markers indicating runways, air traffic control tower, taxiways, and hangars overlaid on the video.[161]

AR can augment the effectiveness of navigation devices. Information can be displayed on an automobile's windshield indicating destination directions and meter, weather, terrain, road conditions and traffic information as well as alerts to potential hazards in their path.[162][163][164] Aboard maritime vessels, AR can allow bridge watch-standers to continuously monitor important information such as a ship's heading and speed while moving throughout the bridge or performing other tasks.[165]

Workplace

AR was used to facilitate collaboration among distributed team members via conferences with local and virtual participants. AR tasks included brainstorming and discussion meetings utilizing common visualization via touch screen tables, interactive digital whiteboards, shared design spaces, and distributed control rooms.[166][167][168]

Complex tasks such as assembly, maintenance, and surgery were simplified by inserting additional information into the field of view. For example, labels were displayed on parts of a system to clarify operating instructions for a mechanic performing maintenance on a system.[169][170] Assembly lines benefited from the usage of AR. In addition to Boeing, BMW and Volkswagen were known for incorporating this technology into assembly lines for monitoring process improvements.[171][172][173] Big machines are difficult to maintain because of the multiple layers or structures they have. AR permitted them to look through the machine as if it was with x-ray, pointing them to the problem right away.[174]

Broadcast and Live Events

Weather visualizations were the first application of augmented reality to television. It has now become common in weather casting to display full motion video of images captured in real-time from multiple cameras and other imaging devices. Coupled with 3D graphics symbols and mapped to a common virtual geospace model, these animated visualizations constitute the first true application of AR to TV.

AR has become common in sports telecasting. Sports and entertainment venues are provided with see-through and overlay augmentation through tracked camera feeds for enhanced viewing by the audience. Examples include the yellow "first down" line seen in television broadcasts of American football games showing the line the offensive team must cross to receive a first down. AR is also used in association with football and other sporting events to show commercial advertisements overlaid onto the view of the playing area. Sections of rugby fields and cricket pitches also display sponsored images. Swimming telecasts often add a line across the lanes to indicate the position of the current record holder as a race proceeds to allow viewers to compare the current race to the best performance. Other examples include hockey puck tracking and annotations of racing car performance and snooker ball trajectories.[67][175][176][177]

Augmented reality for Next Generation TV allowed viewers to interact with the programs they were watching. They could place objects into an existing program and interact with them, such as moving them around. Objects included avatars of real persons in real time who were also watching the same program.[178]

AR was used to enhance concert and theater performances. For example, artists allowed listeners to augment their listening experience by adding their performance to that of other bands/groups of users.[179][180][181]

Tourism and sightseeing

Travelers used AR to access real-time informational displays regarding a location, its features, and comments or content provided by previous visitors. Advanced AR applications included simulations of historical events, places, and objects rendered into the landscape.[182][183][184]

AR applications linked to geographic locations presented location information by audio, announcing features of interest at a particular site as they became visible to the user.[185][186][187]

Translation

AR systems such as Word Lens can interpret the foreign text on signs and menus and, in a user's augmented view, re-display the text in the user's language. Spoken words of a foreign language can be translated and displayed in a user's view as printed subtitles.[188][189][190]

Music

It has been suggested that augmented reality may be used in new methods of music production, mixing, control and visualization.[191][192][193][194]

A tool for 3D music creation in clubs that, in addition to regular sound mixing features, allows the DJ to play dozens of sound samples, placed anywhere in 3D space, has been conceptualized.[195]

Leeds College of Music teams have developed an AR app that can be used with Audient desks and allow students to use their smartphone or tablet to put layers of information or interactivity on top of an Audient mixing desk.[196]

ARmony is a software package that makes use of augmented reality to help people to learn an instrument.[197]

In a proof-of-concept project Ian Sterling, interaction design student at California College of the Arts, and software engineer Swaroop Pal demonstrated a HoloLens app whose primary purpose is to provide a 3D spatial UI for cross-platform devices — the Android Music Player app and Arduino-controlled Fan and Light — and also allow interaction using gaze and gesture control.[198][199][200][201]

AR Mixer is an app that allows to select and mix between songs by manipulating objects - such as changing the orientation of a bottle or can.[202]

In a video Uriel Yehezkel, demonstrates using the Leap Motion controller & GECO MIDI to control Ableton Live with hand gestures and states that by this method he was able to control more than 10 parameters simultaneously with both hands and take full control over the construction of the song, emotion and energy.[203][204]

A novel musical instrument that allows novices to play electronic musical compositions, interactively remixing and modulating their elements, by manipulating simple physical objects has been proposed.[205]

A system using explicit gestures and implicit dance moves to control the visual augmentations of a live music performance that enable more dynamic and spontaneous performances and—in combination with indirect augmented reality—leading to a more intense interaction between artist and audience has been suggested.[206]

Research by members of the CRIStAL at the University of Lille makes use of augmented reality in order to enrich musical performance. The ControllAR project allows musicians to augment their MIDI control surfaces with the remixed graphical user interfaces of music software.[207] The Rouages project proposes to augment digital musical instruments in order to reveal their mechanisms to the audience and thus improve the perceived liveness.[208] Reflets is a novel augmented reality display dedicated to musical performances where the audience acts as a 3D display by revealing virtual content on stage, which can also be used for 3D musical interaction and collaboration.[209]

Privacy concerns

The concept of modern augmented reality depends on the ability of the device to record and analyze the environment in real time. Because of this, there are potential legal concerns over privacy. While the First Amendment to the United States Constitution allows for such recording in the name of public interest, the constant recording of an AR device makes it difficult to do so without also recording outside of the public domain. Legal complications would be found in areas where a right to a certain amount of privacy is expected or where copyrighted media are displayed. In terms of individual privacy, there exists the ease of access to information that one should not readily possess about a given person. This is accomplished through facial recognition technology. Assuming that AR automatically passes information about persons that the user sees, there could be anything seen from social media, criminal record, and marital status.[210]

Notable researchers

History

See also

References

  1. ↑ Steuer, Jonathan. Defining Virtual Reality: Dimensions Determining Telepresence Archived 24 May 2016 at the Wayback Machine., Department of Communication, Stanford University. 15 October 1993.
  2. ↑ Introducing Virtual Environments National Center for Supercomputing Applications, University of Illinois.
  3. ↑ Chen, Brian X. If You’re Not Seeing Data, You’re Not Seeing, Wired, 25 August 2009.
  4. ↑ Maxwell, Kerry. Augmented Reality, Macmillan Dictionary Buzzword.
  5. ↑ Augmented reality-Everything about AR Archived 5 April 2012 at the Wayback Machine., Augmented Reality On.
  6. 1 2 Azuma, Ronald. A Survey of Augmented Reality Presence: Teleoperators and Virtual Environments, pp. 355–385, August 1997.
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