Scanning Speed - Nikon LS-3510 Software Reference Manual

Using the Windows Scanner Plugin
By Image Size: To produce a 8 x 10 inch image suitable for 150 line screen
output, set the height and width units to Inches and the resolution units to DPI,
type 8 for the width, 10 for the height and 300 for the resolution. The crop will
automatically size itself as you do this and the scan pitch will automatically adjust
to allow for the scan size requested. Check the File Size checkbox to lock in this
file size. You may now move or size the crop to cover any area of the preview that
you wish to scan.
To produce a specific image size (640 x 480 pixels for example) is a similar
procedure, except that the width and height units are set to Pixels.
Experiment with the crop selection to see how you can best make use of it. It
will allow enough flexibility to enable any scan that you may wish to make.

Scanning Speed

The most important factor in achieving the fastest scan is being able to fit the
scan into memory. PhotoStyler will allocate a little extra space for an image to
make the size round out to a size it can work with, so while you may have eight
megabytes of memory available, PhotoStyler may start using temporary files after
seven megabytes. Closing or minimizing (displaying as an icon) other images will
also make memory available for the scan.
Different images will have varying scan times depending on their density.
During autoexposure, the scanner will determine the exposure time for each color.
Darker slides require longer scan times.
There are three factors within the dialog that adversely affect scanning speed:
fractional (non-integer) pitches, checking the Highest Quality checkbox and
checking the Smooth Scaling checkbox. A message under the pitch setting is
continuously updated to indicate which of these is true.
When fractional pitches are used, some scaling must be done. Usually, a line of
the image can be scaled while the scanner is scanning the next line. For large
images, however, the scanner will have the next line available before the scaling of
the previous line is complete and the scan will be slower, overall. For a full
description of fractional pitches, see the section above titled Scan Pitch.
As the scanning stage moves, it will stop and start, and this may cause a slight
jitter in the image. Checking the Highest Quality checkbox will ensure that the
stage has settled before the line is scanned. The difference may only be discernible
at higher pitches (lower resolutions) of three and up.
For fractional pitches, checking the Smooth Scaling checkbox will ensure
that no data is lost during the scaling process. A complete description of scaling is
in the section above titled Scan Pitch.
Software Reference for Scanners
6-7