A-61580 November 2007
2-9
Image file storage
locations
This section provides general recommendations regarding the impact
of image file storage locations on the overall throughput of the scanner.
You can receive up to four image files per document. Decisions about
where to write these files when retrieving them from the scanner could
impact the overall throughput of the scanner. In order to prevent
overwriting data the scanner stops feeding paper when the internal
image buffer reaches two-thirds capacity. Scanning will not resume until
buffer memory reaches one-third. In order to minimize the number of
times this condition might occur, it is recommended that image files are
written to a local hard drive in order to avoid the potential overhead of
transferring files across the network to remote drives during scanning.
Bar code recognition
This section provides general information about bar code recognition
and read rates.
The i1800 Series Scanners does not include a bar code accessory. The
host system provides bar code functionality. The main imaging
parameter, which may affect bar code read rates, is
resolution
. Either
black and white, grayscale or color images may be used for bar code
applications. Refer to your software documentation for their
recommendations and/or requirements for image quality to achieve
desired read rates.
Image addressing
Image address information only applies when the scanner is configured
with Image Address enabled via the operator control panel
touchscreen.
The i1800 Series Scanners receive all image address functionality from
the host. This includes index format, starting image address, image
address format and level rules.
Image address format
The image address format can be from one to four fields. Each field
may be up to 9 characters. Total image address length with delimiters is
30 characters. Each field may use level 1, level 2, level 3, and fixed
fields, and must be explicitly defined by the application. See Chapter 3
or 4 (depending on your driver) for more information.
The order of importance for the fields (from highest to lowest) is fixed,
level 3, level 2, level 1. When defining an image address, the field with
the highest importance must always be to the left. For example, F321 is
a valid format. F123 is not a valid format.
You are not required to use all four fields. If you chose to use fewer than
four fields, you must specify a field width of 0 for any unused field. 0
width fields may not be between two non-zero width fields.
When defining fields, you can only have one field assigned to each
individual level. For example, F21 is a valid format. F11 is not a valid
format.
