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Jefferson Y. "Jeff" Han (born 1975) is a computer scientist who worked for New York University's (NYU) Courant Institute of Mathematical Sciences until 2006. He is one of the main developers of " multi-touch sensing ", which, unlike older touch-screen interfaces, is able to recognize multiple points of contact.
The Multi-Touch Collaboration Wall [2] is a large (81 inch width x 48 inch height [3]) monitor invented by Jeff Han that employs multi-touch technology, and is marketed by Han's company, [4] Perceptive Pixel. [2] Han initially developed the technology for military applications. [3]
The company begain in 2006 as Perceptive Pixel, Inc., headquartered in New York City and maintaining offices in Mountain View, Portland, and Washington, D.C. [1] Prior to the company's establishment, founder Jeff Han [2] publicly demonstrated multitouch hardware and software technology at a TED conference in February 2006. [3]
In computing, multi-touch is technology which enables a touchpad or touchscreen to recognize more than one [7] [8] or more than two [9] points of contact with the surface. Apple popularized the term "multi-touch" in 2007 with which it implemented additional functionality, such as pinch to zoom or to activate certain subroutines attached to predefined gestures.
The principal feature that distinguishes the DiamondTouch table from other multi-touch interfaces, such as the Apple iPhone, HP TouchSmart, Microsoft Surface or do-it-yourself systems inspired by the work of Jeff Han, is that the DiamondTouch table can identify who is touching where. [12]
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One example is the work done by Jefferson Han on multi-touch interfaces. In a demonstration at TED in 2006, he showed a variety of means of interacting with on-screen content using both direct manipulations and gestures. For example, to shape an on-screen glutinous mass, Jeff literally 'pinches' and prods and pokes it with his fingers.