data tablet

data tablet

[′dad·ə ‚tab·lət]
(computer science)

digitizer tablet

A graphics drawing tablet used for sketching new images or tracing old ones. Also called a "graphics tablet," the user contacts the surface of the device with a wired or wireless pen or puck. Often mistakenly called a mouse, the puck is officially the "tablet cursor."

For sketching, either the pen or puck is used. For tracing, the puck is preferred because its crosshairs, visible through a clear glass lens, lets you precisely pinpoint ends and corners of detailed drawings.

Most tablets allow parts of the tablet surface to be customized into buttons that can be tapped to select menus and functions in the application.

Digitizer Mode and Mouse Mode
Tablets typically support two modes of operation. "Digitizer mode" creates a one-for-one correspondence between tablet and screen. Wherever the tablet is touched, the screen is drawn in the exact same location. In contrast, "mouse mode" moves the screen pointer (cursor) relative to any starting position on the tablet surface, just like an ordinary computer mouse.

The Output Is X-Y Coordinates
When drawing or tracing on the tablet, a series of x-y coordinates (vector graphics) are created, either as a continuous stream of coordinates, or as end points. See pen tablet, tablet PC and touchscreen.

Digitizer Tablet
Drawings created or traced on tablets are stored as mathematical line segments. Objects are drawn with a pen or puck, but are traced with the puck.

Digitizing Three Dimensions
The 3DRAW PRO 3D digitizer system from Polhemus records x, y and z coordinates of an object by touching its surfaces with a pen. It measures the tip position in 3D space and outputs directly to popular CAD and graphics programs. (Image courtesy of Polhemus, Inc.)
References in periodicals archive ?
"A laptop cannot go out and place handcuffs on an offender, a data tablet cannot go out and console a vulnerable victim, the latest Nokia phone cannot control the alcoholfuelled crowd on a Saturday night.
It should include traditional input devices such as mouse, trackball, joystick, data tablet, coded or unencoded keyboard, wall/desktop/portable touch panels, microphone, image scanner and CCD television camera; less conventional devices such as foot and headmice, gloves, suits, electromagnetic, acoustic, mechanical or electrostatic 3D trackers, tracking systems based upon video, electro-optical, electro-myographic, electro-encephalographic or electro-oculographic information, eye movement tracking systems from infrared, etc.
Officers are investigating the spate of incidents in the Colwyn Bay area where items including phones, laptops, sat navs and a data tablet were taken overnight between Thursday and Friday.
Police vehicles are also equipped with Mobile Data Tablets (MDTs), enabling officers to file reports and gather information instantly.
``Perhaps the most exciting development is the introduction of mobile data tablets in police vehicles and hand-held computers which allow officers to access crime files.''

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