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Image Dimension
controls
3-40
Unit Selection
The unit of measurement for resolution is in dpi (dots per
inch) or lpi (lines per inch). Lpi settings are dimmed if the
ruler unit is in pixels.
To select your option:
Choose dpi if you know precisely the resolution you need for
•
your image. For more details on resolution, see the Basic
Concepts chapter.
Choose lpi Draft to produce resolution that is one times the
•
screen frequency (no higher than 72 pixels per inch). Draft
quality may result in output images that look a little blurred
or indistinct at edges.
Choose lpi Medium to produce resolution that is one and
•
one-half times the screen frequency (no higher than 72 pixels
per inch).
Choose lpi Final to produce resolution that is two times the
•
screen frequency.
These controls allow you to adjust the various factors that
affect the image, including the width and height of your image
when it is first scanned (input), the scaling factor, and the
dimensions of the image when it is finally output.
a
b
This is a mathematical formula expressing the relation of the
a
input dimensions to scaling and how they affect image dimen-
sions when the image is scanned.
Input width and input height refer to the dimensions of the
•
scan frame that you draw. For example, if the image on your
e
d
c
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