Multi-touch

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Multi-touch screen
Multi-touch (or multitouch) denotes a set of interaction techniques which allow computer users to control graphical applications with several fingers.
Multi-touch consists of a touch screen (screen, table, wall, etc.) or touchpad, as well as software that recognizes multiple simultaneous touch points, as opposed to the standard touchscreen (e.g. computer touchpad, ATM), which recognizes only one touch point. This effect is achieved through a variety of means, including but not limited to: heat, finger pressure, high capture rate cameras, infrared light, optic capture, tuned electromagnetic induction, ultrasonic receivers, transducer microphones, laser rangefinders, and shadow capture[1].
Many applications for multi-touch interfaces exist and are being proposed. Multi-touch is often associated with Apple Inc's iPhone and iPod Touch but is also used in many other products such as Apple's MacBook and MacBook Pro notebook line. Other products with multi-touch technology include Microsoft Surface, Asus EEE PC, and Meizu M8.
Modern multi touch controllers support Single-Touch and Multi-Touch All-Point touchscreen applications which allow functions such as playing video games on a mobile handset,using GPS to key in multiple locations, etc.
Contents
1 History
1.1 Bell Labs
1.2 Fingerworks
2 Recent developments
2.1 Microsoft Surface
2.2 Windows 7
2.3 Apple products
2.4 NUI Group
2.5 CUBIT and TouchKit
2.6 Perceptive Pixel
2.7 Asus EEE PC 900
2.8 Dell Latitude XT
2.9 Promethean Multi-user Activboard
2.10 MPIS-Multi Point Interaction Surface
2.11 JazzMutant
2.12 MTmini
2.13 SparshUI
2.14 Neonode
3 The future of multi-touch
4 Popular culture references
5 See also
6 References
7 External links
//
History
Multi-touch technology dates back to 1982, when Nimish Mehta at the University of Toronto developed the first finger pressure multi-touch display.[2]
Bell Labs
In 1983, Bell Labs at Murray Hill published a comprehensive discussion of touch-screen based interfaces. [3]
In 1984 Bell Labs engineered a touch screen that could change images with more than one hand. The group at the University of Toronto stopped working on hardware and moved on to software and interfaces, expecting that they would have access to the Bell Labs work.[2]
A breakthrough occurred in 1991, when Pierre Wellner published a paper on his multi-touch 鎻噄gital Desk, which supported multi-finger and pinching motions. [4][5]
Fingerworks
In 1999, Fingerworks, a Newark-based company run by University of Delaware academics John Elias and Wayne Westerman, produced a line of multi-touch products including the iGesture Pad and the TouchStream keyboard.[2] Westerman published a dissertation in 1999 on the subject. In 2005, after years of maintaining a niche line of keyboards and touchpads, Fingerworks was acquired by Apple Inc.
Recent developments
Various companies expanded upon these discoveries in the beginning of the twenty-first century. Mainstream exposure to multi-touch technology occurred in the year 2007, when Apple unveiled the iPhone and Microsoft debuted surface computing. The iPhone in particular has spawned a wave of interest in multi-touch computing, since it permits greatly increased user interaction on a small scale. More robust and customizable multi-touch and gesture-based solutions are beginning to become available, among them TrueTouch, created by Cypress Semiconductor. The following is a compilation of notable uses of multi-touch technology in recent years.
Microsoft Surface

Microsoft Surface.
Main article: Microsoft Surface
In 2001 Steve Bathiche and Andy Wilson of Microsoft began work on an idea for an interactive table that mixes both physical and virtual worlds. Research and Development expanded rapidly in 2004, once the idea caught the attention of Microsoft Chairman Bill Gates. In 2007 Microsoft introduced Microsoft Surface, a functional multi-touch table-top computer based on a standard PC platform including an Intel Core 2 Duo processor, Windows Vista, and 2 GB of RAM.[6]
Essentially, Microsoft Surface is a computer embedded in a table with a large, flat, touch-responsive display on the top. The table uses small cameras (as opposed to finger pressure or heat) that enable it to react to the touch of any object. The unit has eight different modes that allow users to perform an array of activities,ranging from organizing pictures and videos to ordering food at a restaurant. Multiple users have the ability to work on the table at one time. The preliminary launch was on April 17, 2008, when Surface became available for customer use in AT&T stores. The price for one unit is said to range somewhere...(and so on)

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