Xante Assel-a-Writer-8300, Instruction Manual

Page: 229 / 338

____________________________________ Advanced Features 8-5
Halftone Scanning
The halftone scanning resolution is usually lower than that of the
output resolution. Black and white images generally should be
scanned at a resolution of 2 times that of the line screen used, if
printing at 100% size. Use the following formula to determine the
optimum resolution.
desired lpi x 2 x % of original size
For example, if a line screen of 95 is used, the scanner resolution
should be set to 190 dpi (95 x 2). If that resolution cannot be
selected, choose the next higher resolution available. If the previous
example were to be printed at 75% of original size, then the scanner
resolution should be set to 142 dpi (95 x 2 x .75).
Scanning the image at a lower than optimum resolution results in less
detail. Scanning at a higher resolution increases the file size and the
processing time, and it may only slightly increase the amount of
detail.
TIFF, PICT, EPS Formats
After creating or scanning the image, you need to decide the format
in which to save it. The three most common formats are TIFF
(Tagged Image File Format), PICT (from Picture), and EPS
(Encapsulated PostScript) files. If you use a scanning application
such as Photoshop, make sure to choose the appropriate line screen
under Page Setup before saving the image. This is essential for
importing the image into other applications. Some programs do not
allow you to change the line screen of an individual PICT or EPS
image once it is imported.
PageMaker only allows you to change the line screen of a TIFF file by
clicking the image and choosing Image Control under the Elements
menu. For version specific information, see your PageMaker
documentation.