Computer Studies

1
Computer Studies
Digitizer
Irene Leung Hiu Yan F.4A (18) 2040134
2
Digitizing tablet
Digitizing tablets are also called digitizer
An input device that enables you to enter
drawings and sketches into a computer. A
digitizing tablet consists of an electronic
tablet and a cursor or pen. A cursor (also called
a puck) is similar to a mouse, except that it has
a window with cross hairs for pinpoint placement,
and it can have as many as 16 buttons. A pen
(also called a stylus) looks like a simple
ballpoint pen but uses an electronic head instead
of ink. The tablet contains electronics that
enable it to detect movement of the cursor or pen
and translate the movements into digital signals
that it sends to the computer.
3
For digitizing tablets, each point on the tablet
represents a point on the display screen in a
fixed manner. This differs from mice, in which
all movement is relative to the current cursor
position. The static nature of digitizing tablets
makes them particularly effective for tracing
drawings. Most modern digitizing tablets also
support a mouse emulation mode , in which the pen
or cursor acts like a mouse.
To translate into a digital form. For example,
optical scanners digitize images by translating
them into bit maps. It is also possible to
digitize sound, video, and any type of movement.
In all these cases, digitization is performed by
sampling at discrete intervals. To digitize
sound, for example, a device measures a sound
wave's amplitude many times per second. These
numeric values can then be recorded digitally.
4
PenMat Wirless Digitizer
The PenMate Digitizer is a state-of-the-art pen
graphic device that give you a free movement and
natural way to draw or write comfortably around
your screen. The PenMate Digitizer features 512
level pressure sensitivities and a wirless stylus
pen. PenMate Digitizer has all the functions of
a mouse , but is much more powerful. Ideal for
drawing, handwriting, signatures word processing,
photo retouching, creating original artwork,
CAD/CAM, electronic presentations, digital
whiteboard, video con- ference, and much more
applications.
5
DP105 PCI Digitizer Card with Oscilloscope
Characteristics
-1 channel -500 MS/s Sampling Rate -150 MHz
Bandwidth -50 Ohm and 1 MOhm Input Impedance
-128 kpoints Acquisition Memory (1Mpoints
optional)
6
Features
-Precision full 512 levels wirless pressure
sensitive pen table with ultra-high resolution
up to 4064 LPI -Pen Presure pattern
automatically recerded and adjustable
pevsonalized -The only Digitizer by providing
RS-232 and USB (pnp) flexible installation
interface-Excellent compatibility with all
applications and up-to-date operating plate for
ms-Ergonomic design provides best protection of
your wrist and let you naturally draw and write
as you desires
7
Source of information
http//www.whatis.com http//www.webopedia.com htt
p//www.ergotech.com.tw/e_index/e_products/e_pen/p
en_all.htm  
The End