Tangible User Interface

A tangible user interface (TUI) is a user interface in which a person interacts with digital information through the physical environment. The initial name was Graspable User Interface, which no longer is used.

One of the pioneers in tangible user interfaces is Hiroshi Ishii, a professor in the MIT Media Laboratory who heads the [http://tangible.media.mit.edu/|Tangible Media Group] . His particular vision for tangible UIs, called "Tangible Bits", is to give physical form to digital information, making bits directly manipulable and perceptible. Tangible bits pursues seamless coupling between these two very different worlds of bits and atoms.

Characteristics of Tangible User Interfaces

# Physical representations are computationally coupled to underlying digital information.
# Physical representations embody mechanisms for interactive control.
# Physical representations are perceptually coupled to actively mediated digital representations.
# Physical state of tangibles embodies key aspects of the digital state of a system.

Examples

An example of a tangible UI is the "Marble Answering Machine" by Durrell Bishop (1992). A marble represents a single message left on the answering machine. Dropping a marble into a dish plays back the associated message or calls back the caller.

Another example is the "Topobo" system. The blocks in Topobo are like LEGO blocks which can be snapped together, but can also move by themselves using motorized components. A person can push, pull, and twist these blocks, and the blocks can memorize these movements and replay them.

Another implementation allows the user to sketch a picture on the system's table top with a real tangible pen. Using hand gestures, the user can clone the image and stretch it in the X and Y axes just as one would in a paint program. This system would integrate a video camera with a gesture recognition system.

Several approaches have been made to establish a generic middleware for tangible user interfaces (TUI). They target toward the independence of applicationdomains as well as flexibility in terms of the deployed sensor technology. For collaboration support TUIs have to allow the spatial distribution, asynchronous activities, and the dynamic modification of the TUI infrastructure, to name the most prominent ones. This approach presents a framework based on the LINDA tuple space concept to meet these requirements. The implemented TUIpist framework deploys arbitrary sensor technology for any type of application and actuators in distributed environments.

A further example of a type of TUI is a Projection Augmented model.

External links

* [http://portal.acm.org/citation.cfm?id=1339263.1339541&coll=&dl=&CFID=15151515&CFTOKEN=6184618 Proceedings of the 16th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises]
* [http://www.tei-conf.org/ Tangible and Embedded Interaction Conference]
* [http://tangible.media.mit.edu/ MIT Media Lab Tangible Media Group]
*Hiroshi Ishii and Brygg Ullmer, [http://sigchi.org/chi97/proceedings/paper/hi.htm Tangible Bits: Towards Seamless Interfaces between People, Bits and Atoms] . Published in the Proceedings of [http://sigchi.org/chi97/ Human Factors in Computing Systems: CHI 97] , Denver, CO.
* [http://tangint.org Tangint] : Wiki for drawing together content and discussion related to research on tangible interfaces/interaction.
* [http://hci.stanford.edu/research/papier-mache/ Papier-Mâché] : a toolkit for building tangible UIs
* [http://www.percussa.com/ Percussa AudioCubes] : Tangible interface for exploring sound/music
* [http://mtg.upf.es/reactable?software reacTIVision] : a framework for creating tangible UIs
* [http://web.media.mit.edu/~hayes/topobo/ Topobo project]
* [http://www.globis.ethz.ch/research/paper/ Interactive Paper] : Integrating paper and digital information
* [http://web.media.mit.edu/~cati/movingpictures.html Moving Pictures project]
* [http://www.shaderlamps.com Spatial Augmented Reality]
* [http://www.jamespatten.com/audiopad/ Audiopad] : a composition and performance instrument
* [http://www.memodules.ch/ Memodules Project] : Memodules as tangible shortcuts to multimedia information
* [http://www.tangerineproject.org/ TANGerINE Project] : A Tangible Interactive Natural Environment which merges tabletop interfaces and smart objects
* [http://reactable.iua.upf.edu/ reactable] : A collaborative electronic music instrument with a tabletop tangible multi-touch interface.
* [http://wiki.imrc.kist.re.kr/Tangible_Web Tangible Web] : Tangible Web Project