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gesture recognition(1) See mouse gestures.
(2) Swiping a touchscreen with a stylus or one or more fingers. Pinching and expanding with two fingers is quite common for resizing images. See swipe and multitouch.
(3) Computer recognition of handwritten check marks, slashes and other shorthand symbols as commands and annotations.
(4) Identifying hand and body movements. In 1998, Toshiba introduced an infrared device that reflected light from a user's hand to sense motion. More than a decade later, this capability was employed in Microsoft's Kinect controller for its Xbox, and motion control products have debuted ever since. See Kinect.
|Pretend It's in Your Hand|
|The Leap Motion controller lets people play games and musical instruments, create objects and explore the world with Windows and Mac gesture-based apps. (Image courtesy of Ultraleap Limited, www.ultraleap.com)|
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