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TechTalk: Scanner Hardware
The scanner software will provide several options. What
kind of image are you scanning? The requirements for scanning the car
title are different than scanning the family photos. Notice, selecting a
option (color photo, print, black and white) changes the resolution and the contrast.
Resolution is a measure of
the number of pixels per inch: the more pixels, the better the clarity.
As a rule of thumb 150 dpi is good for a snap shot. A resolution of 300
dpi will work for a line art or an image with a lot of detail.
Adjusting the contrast alters
the difference between black and white. If the contrast is wrong, a
scanned image of a text document is blurred by shadows and moirés. The
text appears shiny and difficult to read. |
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