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A-4 A-61124 March 1999
Scaling
Method used to obtain output resolutions other than the base
resolution of the scanner. Can be done only from a higher
resolution to a lower resolution.
Scanner-unique command
Allows the host computer and the scanner to communicate with
each other. Scanner-unique commands must be in the format
described in this manual.
Screening
Creates a pseudo gray-scale image and the electronic equivalent
of the technique newspapers use to print pictures.
Recommended for continuous tone photographic images. Also
referred to as an 'ordered dither.’
Seed
A Sequential ID Number, sent from the host to the scanner, which
will be used as the first number for the document image number.
Small computer-system interface (SCSI)
Evolving industry ANSI standard that facilitates communication
between computers and their (SCSI) intelligent peripherals. The
scanner transmits digitized image data to the appropriate host
subsystem via the SCSI bus. The interface supports two-way
command/data communication between the scanner and the
host. The SCSI-2 command set is supported as well as a set of
scanner-unique commands.
Thresholding
The conversion of a gray scale image into a bi-tonal (1 bit/pixel)
image. Thresholding techniques include fixed, adaptive, screen
and mixed.