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53
Exercise 3. Match the synonyms.
Verbs
1 2
1. display
2. energize
3. record
4. generate
5. emerge
6. convert
a) appear
b) activate
c) exist
d) produce
e) show
f) transform
g) write down
h) refresh
Nouns
1 2
1. term
2. portion
3. intensity
4. hue
5. dot
a) activity
b) color
c) word
d) sector
e) point
f) beam
g) screen
COMPUTERS GRAPHICS
Computer graphics means the use of computers to produce pictorial images.
The images produced can be printed documents or animated motion pictures, but the
term computer graphics refers particularly to images displayed on a monitor. Monitor
can display graphics as well as alphanumeric data. A computer-graphics system
basically consists of a computer to store and manipulate images, a monitor, various
input and output devices, and a graphics software package - i.e., a program that
enables a computer to process graphic images by means of mathematical language.
A computer displays images on the phosphor-coated surface of a graphics
display screen by means of an electron beam that sweeps the screen many times each
second. Those portions of the screen energized by the beam emit light, and changes
in the intensity of the beam determine their brightness and hue. The brightness of the
resulting image fades quickly, however, and must be continuously "refreshed" by the
beam, typically 85 times per second.
Graphics programs enable a user to draw, color, shade, and manipulate an
image on a display screen with the use of a mouse, a pressure-sensitive tablet, or a
light pen. Preexisting images on paper can be scanned into the computer through the
use of scanners, digitizers, pattern-recognition devices, or digital cameras. Frames of
images on videotape also can be entered into a computer. Various output devices
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