Kodak Document Scanner 9500 with Image Manager Integrator Manual page 77

Contrast determines the ability of the scanner to detect subtle
Contrast (without ATP)
differences in gray levels. It is defined as a percentage, from
0 to 100%. A high contrast value will produce a scanned output
of mostly blacks and whites (only large changes in gray levels are
detected). A low contrast value will produce a scanned output of
mostly midtones (more subtle change in gray levels are detected).
It is recommended that a relatively high contrast value be used to
optimize the quality of text.
Refer to Chapter 6, Scanner-unique Commands for a description
of the KX/Y/Z command.
This document was scanned using a high contrast value:
This is the same document, scanned using a low contrast value:
E-4 A-61122/A-61124 March 1999