الوحدة السابعة :: مادة مهارات حاسوب
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Scanning device
Flatbed scanners: like the copy machine.
Portable scanners: hand held device that
slides across the image.
Magnetic card readers: encoded information
is sorted on
RFID: more convenient because they don’t
require the card actually make contact the
reader.
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Character and mark recognition devices
MICR: read those unused number on bottom
of check.
OCR: special printed character that can be
read by a light source changed into machine
readable code.
OMR: used to standardized multiple choice
test.
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Monitors
Resolution: image are formed on monitor by
a series of dots or pixels (picture element).
Dot pitch: is distance between each pixel.
Refresh rate: how often a displayed image is
updated or refreshed.
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End