Multi-Touch Technology

Multi-Touch Technology : Multi-Touch Technology By April S. Reyna Human Computer Interface

Multi-Touch: History : Multi-Touch: History Multi-touch technology dates back to 1982 The University of Toronto developed the first finger pressure multi-touch display In 1984 Bell Labs engineered a touch screen that could manipulate images In 1991 Pierre Wellner published a paper on his multi-touch “Digital Desk”, which supported multi-finger and pinching motions In 1998 Fingerworks produced a line of multi-touch products including the iGesture Pad Apple Inc. is attempting to trademark the term Multi-Touch

Multi-Touch Technology : Multi-Touch Technology What is Multi-touch: It is a human-computer interaction technique , which includes the hardware devices that implement it. It allows users to compute WITHOUT conventional input devices (e.g., mouse, keyboard). 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 touch screen (i.e. 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, and shadow capture. This is the second level of text.

Multi-Touch Technology : Multi-Touch Technology Multi-Touch Sensing through Frustrated Total Internal Reflection (FTIR)Detecting multiple finger touches on a rear-projection surface.

Multi-Touch Technology : Multi-Touch Technology Perceptive Pixel

Perceptive Pixel : Perceptive Pixel While touch sensing is commonplace for single points of contact, multi-touch sensing enables a user to interact with a system with more than one finger at a time, as in chording and bi-manual operations. Such sensing devices are inherently also able to accommodate multiple users simultaneously, which is especially useful for larger interaction scenarios such as interactive walls and tabletops. These go far beyond the "poking" actions you get with a typical touchscreen, or the gross gesturing found in video-based interactive interfaces. It is a rich area for research, and we are extremely excited by its potential for advances in efficiency, usability, and intuitiveness. It's also just so much fun! Our technique is force-sensitive, and provides unprecedented resolution and scalability, allowing us to create sophisticated multi-point widgets for applications large enough to accommodate both hands and multiple users. Jefferson Han: Project Director

Multi-Touch Technology : Multi-Touch Technology Microsoft Surface

Microsoft Surface : Microsoft Surface 2) Infrared –• Surface’s “machine vision” operates in the near-infrared spectrum, using an 850-nanometer-wavelength LED light source aimed at the screen. When objects touch the tabletop, the light reflects back and is picked up by multiple infrared cameras with a net resolution of 1280 x 960. 3) CPU –• Surface uses many of the same components found in everyday desktop computers — a Core 2 Duo processor, 2GB of RAM and a 256MB graphics card. Wireless communication with devices on the surface is handled using WiFi and Bluetooth antennas (future versions may incorporate RFID or Near Field Communications). The underlying operating system is a modified version of Microsoft Vista. 4) Projector -• Microsoft’s Surface uses the same DLP light engine found in many rear-projection HDTV’s. The footprint of the visible light screen, at 1024 x 768 pixels, is actually smaller than the invisible overlapping infrared projection to allow for better recognition at the edges of the screen. 1) Screen –• There is a diffuser which turns the Surface’s acrylic tabletop into a large horizontal “multitouch” screen, which is capable of processing multiple inputs from multiple users. The Surface is so far advanced than we could imagine that it can recognize objects by their shapes or by reading coded “domino” tags when placed on the table.

Multi-Touch Technology : Multi-Touch Technology Cubit

Multi-Touch Technology : Multi-Touch Technology Apple iPhone

Apple iPhone : Apple iPhone Built-in Sensors: The iPhone incorporates an accelerometer, which detects when a user switches from holding the phone in landscape to portrait mode, and automatically updates the image on screen to fit the mode. The sensors also detect when you put the iPhone near your phone, and automatically shuts off the display screen until you move it away to save on battery power. An ambient light sensor automatically adjusts the screen's brightness to the appropriate level for the current ambient light, which enhances user experience and also saves on battery power. Display: The iPhone features an amazing 3.5 inch widescreen multi-touch display.

Multi-Touch Technology : Multi-Touch Technology MacBook Pro Mac Tablet

Multi-Touch Technology : Multi-Touch Technology Fiducials Reactable Framework

Multi-Touch Technology : Multi-Touch Technology Lemur

The Future of Multi-Touch : The Future of Multi-Touch Enhanced dining experience order food, ask for refills, split check, pay bill, entertainment while dining Concierge service locate landmarks, plan day, uplink info to cellular phone Governmental use Concept mapping An enhanced multimedia experience Gaming The use of multi-touch technology is expected to rapidly become common place. For example, touch screen telephones are expected to increase from 200,000 shipped in 2006, to 21 million in 2012. Developers of the technology have suggested a variety of ways that multi-touch can be used including:

The Future of Multi-Touch : The Future of Multi-Touch New ways of doing business New innovations and ideas Creative art Multi-touch musical instruments Shopping at a new level More jobs Multi-touch Games Entertainment will be affected Medical Purposes

Slide 17 : Interesting New Technology: Multi-Touch Technology http://www.multitouchtechnology.com/ http://cs.nyu.edu/~jhan/ftirtouch/ Perceptive Pixel http://www.perceptivepixel.com/ Microsoft Surface http://www.microsoft.com/surface/press.html http://www.microsoft.com/surface/index.html Microsoft Surface Videos http://www.popularmechanics.com/technology/industry/4217348.html Retractable Videos http://reactable.iua.upf.edu/?media Cubit Website http://nortd.com/cubit/ Photosynth Website and Video http://labs.live.com/photosynth/ http://www.ted.com/index.php/talks/view/id/129 BumpTop Website and Video http://bumptop.com/ http://www.ted.com/index.php/talks/view/id/131 Lemur Information http://www.jazzmutant.com/lemur_overview.php

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