form an important part of essential office equipment in the modern
office environment and are used in conjunction with computers.
They are increasingly being used for newer applications and with
prices becoming more and more competitive, while their cost to
performance ratio is constantly improving.
are used in desktop publishing for creating documents like newsletters,
brochures and technical manuals all of which contain text and
graphics in black and white/color. When used for document imaging,
they scan documents and file them in an electronic format. They
are used for optical character recognition (OCR) in which, by
using a suitable software program with OCR capabilities like FineReader
or Textbridge, the computer is able to 'read' each letter of a
scanned document and convert it into a word processing document.
In web designing, they scan text and images/photographs to create
Photo editing is another field where they contribute unparalleled
service to improve or change the quality of colored or black and
white photographs. They are also able to scan and email documents
and eliminate the need for using a fax machine if and when required.
Different scanners incorporate different features and can be
either colored or black and white scanners. There are flatbed
scanners, sheet fed scanners, film/slide scanners, card scanners,
hand held scanners and drum scanners.
scanner is best for scanning originals of varying
thickness like photographs, books, magazines etc. Automatic page
feeding is also possible by fitting suitable adapters. The scan
area can be anywhere from 8.5 inches by 11 inches to 13 inches
by 18 inches. Optical resolution is usually up to 5000 dpi.
fed scanners are less expensive. The resolution can
be up to 400 dpi and scanning is limited to 'sheets' of paper
up to a specific size. A handheld scanner is a fairly inexpensive
option and is small enough to be carried while being on the move.
It can be dragged over pages of books and other documents to scan
select sections. However, it does not provide a sharp image everytime
as it is hand held, and has a tendency to create a distorted image
if moved slower/faster than necessary.
scanners are very expensive and used for higher applications
requiring resolutions up to 12000 dpi.
scanners are used to keep a record of business cards.