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E-4 A-61122/A-61124 March 1999
Contrast (without ATP)
Contrast determines the ability of the scanner to detect subtle
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: