3D human–computer interaction: Difference between revisions

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{{short description|Form of human-machine interaction}}

[[File:Virtual-Fixtures-USAF-AR.jpg|thumb|[[Virtual Fixture]]s, a system for 3D human-computer interaction.]]

'''3D interaction''', also known as '''3D human-computerhuman–computer interaction''', is a form of [[human-computerhuman–computer interaction]] where [[User (computing)|users]] are able to move and perform [[Human–computer interaction|interaction]] in [[Three-dimensional space|3D space]]. Both the user and the computer process information where the physical position of elements in 3D space is relevant. It largely encompasses [[virtual reality]] and [[augmented reality]].

The 3D space used for interaction can be the real [[physical space]], a [[virtual space]] representation simulated on the computer, or a combination of both. When the real physical space is used for data input, the human interacts with the machine performing actions using an [[input device]] that [[Positional tracking|detects the 3D position]] of the human interaction, among other things. When it is used for data output, the simulated 3D virtual scene is projected onto the real environment through one [[output device]].

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== 3D user interfaces ==

[[File:3D_User_Interaction.jpg|thumb|528x528pxupright=2|Scheme of 3D user interaction phases]]{{About|both software and hardware 3D input/output devices|uniquely software 3D user interfaces|3D GUI|section=yes}}[[User interface]]s are the means for communication between users and systems. 3D interfaces include media for 3D representation of system state, and media for 3D user input or manipulation. Using 3D representations is not enough to create 3D interaction. The users must have a way of performing actions in 3D as well. To that effect, special input and output devices have been developed to support this type of interaction. Some, such as the 3D mouse, were developed based on existing devices for 2D interaction.

3D user interfaces, are user interfaces where 3D interaction takes place, this means that the user's tasks occur directly within a three-dimensional space. The user must communicate with commands, requests, questions, intent, and goals to the system, and in turn this one has to provide feedback, requests for input, information about their status, and so on.

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This type of device is the most popular. Its goal is to present the information produced by the system through the human visual system in a three-dimensional way. The main features that distinguish these devices are: field of regard and [[field of view]], [[spatial resolution]], screen geometry, light transfer mechanism, [[refresh rate]] and [[ergonomics]].

Another way to characterize these devices is according to the different categories of [[depth perception]] cues used to achieve that the user can understand the three-dimensional information. The main types of displays used in 3D user interfaces are: monitors, surround-screen displays, workbenches, hemispherical displays, head-mounted displays, arm-mounted displays and autostereoscopic displays. [[Virtual reality headset]]s and CAVEs ([[Cave Automatic Virtual Environment]]s (CAVEs) are examples of a fully immersive visual displaydisplays, where the user can see only the virtual world and not the real world. Semi-immersive displays allow users to see both. Monitors and workbenches are examples of semi-immersive displays.

==== 3D audio ====

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=== 3D user interface input hardware ===

These hardware devices are called input devices and their aim is to capture and interpret the actions performed by the user. The [[degrees of freedom]] (DOF) are one of the main features of these systems. Classical interface components (such as mouse and keyboards and arguably touchscreen) are often inappropriate for non 2D interaction needs.<ref name ="BowmanBook" /> These systems are also differentiated according to how much physical interaction is needed to use the device, purely active need to be manipulated to produce information, purely passive do not need to.

The main categories of these devices are standard (desktop) input devices, tracking devices, control devices, navigation equipment, [[gesture interface]]s, [[Mouse (computing)|3D mice]], and [[brain–computerbrain-computer interface]]s.

==== Desktop Input devices ====

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[[File:Wiimote-Safety-First.jpg|thumb|Wiimote device]]

The [[Wii Remote]] device does not offer a technology based on 6-DOF. since againHowever, cannot provide absolute position, in contrast,it is equipped with a multitude of sensors, which convertmake a 2D device init a great tool of interaction in 3D environments. It has gyroscopes to detect rotation of the user, accelerometers ADXL3000, for obtaining speed and movement of the hands, optical sensors for determining orientation and electronic compasses and infra-red devices to capture the position.

This device has gyroscopes to detect rotation of the user, accelerometers ADXL3000, for obtaining speed and movement of the hands, optical sensors for determining orientation and electronic compasses and infra-red devices to capture the position.

This type of device can be affected by external references of [[infra-red]] light bulbs or candles, causing errors in the accuracy of the position.

===== Google Tango Devices =====

[[File:Google ATAP's Project Tango tablet (15387052663).jpg|thumb|Google's Project Tango tablet, 2014]] The [[Tango (platform)|Tango Platform]] is an augmented reality computing platform, developed and authored by the Advanced Technology and Projects (ATAP), a skunkworks division of Google. It uses computer vision and internal sensors (like gyroscopes) to enable mobile devices, such as smartphones and tablets, to detect their position relative to the world around them without using GPS or other external signals. It can therefore be used to provide 6-DOF input which can also be combined with its multi-touch screen.<ref>{{cite journal | last1=Besancon | first1=Lonni | last2=Issartel | first2=Paul | last3=Ammi | first3=Mehdi | last4=Isenberg | first4=Tobias | title=Hybrid Tactile/Tangible Interaction for 3D Data Exploration | journal=IEEE Transactions on Visualization and Computer Graphics | volume=23 | issue=1 | year=2017 | issn=1077-2626 | doi=10.1109/tvcg.2016.2599217 | pmid=27875202 | pages=881–890 | s2cid=16626037 | url = https://hal.inria.fr/hal-01372922/document }}</ref> The Google Tango devices can be seen as more integrated solutions than the early prototypes combining spatially-tracked devices with touch-enabled-screens for 3D environments.<ref>{{cite conference | last1=Fitzmaurice | first1=George W. | last2=Buxton | first2=William | title=Proceedings of the ACM SIGCHI Conference on Human factors in computing systems | chapter=An empirical evaluation of graspable user interfaces | publisher=ACM Press | ___location=New York, New York, USA | year=1997 | pages=43–50 | isbn=0-89791-802-9 | doi=10.1145/258549.258578 | chapter-url = http://www.dgp.toronto.edu/~gf/papers/PhD%20-%20Graspable%20UIs/Thesis.gf.html | doi-access=free }}</ref><ref>{{cite conference | last1=Angus | first1=Ian G. | last2=Sowizral | first2=Henry A. | editor-last=Fisher | editor-first=Scott S. | editor2-last=Merritt | editor2-first=John O. | editor3-last=Bolas | editor3-first=Mark T. | title=Embedding the 2D interaction metaphor in a real 3D virtual environment | series=Stereoscopic Displays and Virtual Reality Systems II | publisher=SPIE | date=1995-03-30 | volume=2409 | pages=282–293 | doi=10.1117/12.205875 }}</ref><ref>{{cite conference | last1=Poupyrev | first1=I. | last2=Tomokazu | first2=N. | last3=Weghorst | first3=S. | title=Proceedings. IEEE 1998 Virtual Reality Annual International Symposium (Cat. No.98CB36180) | chapter=Virtual Notepad: handwriting in immersive VR | year=1998 | pages=126–132 | publisher=IEEE Comput. Soc | isbn=0-8186-8362-7 | doi=10.1109/vrais.1998.658467 | chapter-url = http://www8.cs.umu.se/kurser/TDBD12/HT02/papers/virtual%20notepad.pdf }}</ref>

===== Microsoft Kinect =====

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===== Leap Motion =====

[[File:Leap Motion Controller.JPG|thumb|Leap Motion Controller]]
The [[Leap Motion]] is a new system of tracking of hands, designed for small spaces, allowing a new interaction in 3D environments for desktop applications, so it offers a great fluidity when browsing through three-dimensional environments in a realistic way.

It is a small device that connects via USB to a computer, and used two cameras with infra-red light LED, allowing the analysis of a hemispheric area about 1 meter on its surface, thus recording responses from 300 frames per second, information is sent to the computer to be processed by the specific software company.

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* [[Interaction design]]

* [[Cave Automatic Virtual Environment]] (CAVE)

* [[Fitts's law]]

== References ==

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[[Category:Human–computer interaction]]

[[Category:User interface techniques]]

[[Category:3D human-computer interaction]]