A brief overview of how it works, how you would
choose a scanner will be covered here.
A scanner is similar to digital cameras.
A scanner converts an image, printed text, or
handwriting, or an object to a digital image.
A flatbed scanner which is the most common in
offices converts any printed or reasonably flat
material, such as photographs, into digital image.
To the extent that it has a glass plate under a
lid, and a moving light that scans across under
it, the flatbed scanner is very much like a copy
machine.
A document scanner creates digital records of a
range of documents, especially for paper office
documents.
The film scanner allows you scan a film.
In order to operate the scanner, we need to use
software.
Scanners usually come with software, such as
Adobes Photoshop product, that lets you resize
and modify a captured image.
An application such as PhotoShop uses the TWAIN
program that is a software standard that all the
scanner manufacturers agree to use, intended so
that all image programs can operate all scanners
to read in the image.
Functions in Scanners.
Scanner resolution (the sharpness of text and
images on paper) is usually measured in dots per
inch (dpi), whereas cameras are rated in total
pixels.
Most basic scanners provide sufficient resolution
for most purposes.
Basic scanners scan about 3 to 4 sheets per
minute.
But expensive scanners are much faster.
You have to consider the speed of the scanner if
you do much scanning.
Basic scanners come with a small amount of memory
(usually, one megabyte) that can be expanded by
the user.
It is helpful and faster when scanning larger or
more detailed images with having more than one
megabyte of memory.
Consider your budget and the features the scanner
offers before you buy a scanner. | | Author Info: Linda A |
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