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Chapter IV. The TWAIN Interface
25
An Introduction to TWAIN
T
he TWAIN program is a very important piece
of software that comes with your scanner. This
program acts as an interface between the scanner
hardware and the image-editing software you are using
to view and edit images. The TWAIN program is used
to actually operate the scanner and not only tells the
scanner what type of document or image you are
scanning, but also allows you to adjust a number of
settings to define the quality of the scanned image. The
following chapter describes the TWAIN interface (see
Figure 8) which automatically opens when you click
SCAN, or ACQUIRE from within a TWAIN
compatible scanning program or image-editing
application.
The TWAIN interface allows you to make
important adjustments before scanning. For example,
you can scan in different modes: black and white,
grayscale or color; increase or decrease the resolution
(dots per inch of an image), and adjust the brightness
and/or contrast. The Prescan option allows you to
adjust the borders of the scan area by increasing or
decreasing the size of the dotted box located inside the
Prescan Area. The TWAIN interface also provides
you with statistics such as how large an image will be
after scanning, in terms of both file size and physical
dimensions.